Optical film, method for production thereof and method of controlling optical properties thereof

FIELD: physics.

SUBSTANCE: optical film has a moth-eye relief structure, having multiple protrusions which include multiple slanting protrusions that are inclined relative the primary surface of the film in essentially the same direction when viewing the primary surface of the film from above. The slanting protrusions lie on the periphery of the optical film and are inclined into the film when viewing the primary surface of the optical film from above. The method of making the film includes a step of applying a physical force to the moth-eye structure so as to slant said multiple protrusions. Said step includes a polishing sub-step which involves polishing the moth-eye structure in a predetermined direction.

EFFECT: providing directivity of optical properties of the optical film.

19 cl, 26 dwg

 

The technical FIELD

The present invention relates to an optical film, method of manufacture and method of controlling its optical characteristics. In particular, the present invention relates to an optical film that is used as a coating material for protection from "peeping" (covering material to protect from invasion of privacy) or for decoration, method for manufacturing the above-mentioned film and method of controlling its optical characteristics.

The LEVEL of TECHNOLOGY

A display device, for example, a display device for cathode-ray tubes (CRT), liquid crystal display device (LCD), plasma display panel (PDP) and electroluminescent (EL) display device, need to have various features on their surfaces, for example, protection from scratches, reflection protection of natural light and protection from pollution.

Microrelief structure type "eyes of a butterfly" (the structure of the moth-eye), which can provide high antireflection effect without the interference light, attracts attention as a means to achieve low reflection on the reflecting surfaces of the display devices.

In addition, it is known the use of antireflection film comprising a transparent substrate, a hard coating layer containing, Melsheimer, one layer, and a layer with a low refractive index on the outer layer, as a means to prevent the reflection of daylight; in this antireflection film matte hard coating layer is 40% or above, the surface roughness Ra is 0.10 μm or less and the average value of the reflection coefficients at an angle of 5 degrees is 65% or more from the average value of the integral reflection coefficient in the wavelength range from 450 nm to 650 nm (see, for example, patent document 1).

Patent document 1: JP 2005-187770 A

DISCLOSURE of INVENTIONS

On Fig shows a schematic sectional view representing a liquid crystal display device with a fixed conventional optical film structured like the eye of the butterfly (film moth-eye).

As shown in Fig, the conventional liquid crystal display device includes a liquid crystal panel 150 of the display, the polarizer 160, mounted on the liquid crystal panel 150 of the display, and the film 111 moth-eye attached to the polarizer 160.

The liquid crystal panel 150 of the display comprises a pair of glass substrates 151 and 153 and the liquid crystal layer 156 located between the glass substrate 151 and 153. The layer 152 of control elements containing a layer of thin-film transistors (TFT) and sleuth (oxide of indium and tin), formed on the glass substrate 151. On the glass substrate 153 is formed a layer 154 of color filters (CF) and the layer (155) ITO (indium oxide and tin).

The polarizer 160 contains a film 161 from triacetylcellulose (TAC), slow-wave phase film 163, the polarizer 162 located between the film 161 from triacetylcellulose (TAC) and slow phase film 163, and the adhesive layer 164 to attach the polarizer 160 to the liquid crystal panel 150 of the display. The polarizer 162 is made of polyvinyl alcohol resin containing iodine.

Film 111 moth-eye contains on its surface structure of the moth-eye containing numerous protrusions 112.

However, in the conventional film 111 moth-eye structure of the moth-eye formed so that the protrusions 112 continue isotropic relative to the incident light, in other words, continue vertically relative to the main surface of the film 111, as shown in Fig to reduce reflection from the surface in any direction of observation. Thus, the light from the inside of the panel 150 isotropic passes through the film 111 moth-eye, and the reflection from the surface of daylight isotropic attenuated film 111 moth-eye. Therefore, the creation of the film 111 moth-eye with directional (anisotropic) optical characteristics is a difficult task. The complexity is due to the fact that the protrusions 112 continues vertically considers the flax main surface film 111, and, therefore, the optical characteristics of the structure of the moth-eye show no orientation.

In addition, in the method described in patent document 1, a hard coating layer contains hollow particles of silicon dioxide. However, these particles are placed randomly, and therefore, the layer is not able to control the scattering. In an alternative variant of the mode in which particles of different species sew in the layer of solid coating; however, the ability to control the arrangement of the particles of the respective species is absent.

The present invention was created in connection with the above-described problems, and aims at the creation of the optical film with the structure of the moth-eye optical characteristics, such as reflection and scattering, show direction, the method for forming the above-mentioned film and method of controlling optical characteristics.

The authors of the present invention have performed various studies on the optical film with the structure of the moth-eye optical characteristics, such as reflection and scattering, show direction, and therefore drew attention to the protrusions that form the structure of the moth-eye. In this case, the authors found that the characteristics of light, such as reflection and scattering, can be controlled to vary the direction of drop through about the level structure of the moth-eye containing numerous inclined ledges, which are inclined in the direction located at an angle to the main surface of the film, and which is inclined, essentially in the same direction as in the plan of the main surface of the film. As a result, the authors of the present invention came to the solution to the above problems and have established the present invention.

Thus, the present invention relates to an optical film containing the structure of the moth-eye containing multiple tabs, with the tabs contain numerous sloping ledges, which are tilted relative to the main surface of the film, and oblique projections inclined, essentially in the same direction as in the plan of the main surface of the film.

The expression "essentially the same direction" means in the present description, preferably, the direction, the same to such an extent that the human eye can recognize the orientation of the optical characteristics of the optical film in accordance with the present invention. In particular, changes in the tilt directions numerous inclined ledges, polished in the same direction, are preferably in the range of 45°, more preferably within 30°, more preferably within 20°, and in particular, preferably, the limit is 10°, on view in plan of the main surface of the film. The above preferred ranges of tilt on view in plan of the main surface of the film is set by the calculation range of the tilt directions of the inclined protrusions that can cause the above effects caused by the structure of the moth-eye, and sustainable direction, on the basis of photographs obtained with a scanning electron microscope (SEM) for optical films made of different materials under different conditions.

The configuration of the optical film in accordance with the present invention is not specifically limited other components, provided that the configuration contains the components.

Preferred embodiments of the optical film in accordance with the present invention are described in detail below. The following implementation options can be used in combination.

As mentioned above, in the preferred embodiment, the optical film has optical characteristics which are oriented in a direction inclined relative to the main surface of the film.

In a preferred embodiment, the inclined protrusions formed by the application of physical force to the protrusions. Thereby, it is possible to easily manufacture the optical film in accordance with the present invention.

the Numerical density of inclined protrusions is preferably, at least 0.5 units/mm2more preferably not less than 0.7 units/mm2even more preferably, not less than 0.8 units/mm2and, particularly preferably, not less than 0.85 units/mm2. If the numerical density of less than 0.5 units/mm2then the optical characteristics of the optical film in accordance with the present invention it is impossible to give a direction.

In a preferred embodiment, the structure of the moth-eye contains sticky structure (group structure), and coalescent structure contains a number of tabs, the ends of which are interconnected. Any structure corresponds to the numerical density of, preferably, not more than 0.40 pieces/mm2more preferably, not more than 0.35 units/mm2even more preferably, not more than 0.30 pieces/mm2and, particularly preferably, not more than 0,26 pieces/mm2.

In a preferred embodiment, the tabs contain slanted protrusions on the peripheral area of the optical film, and an angled protrusions on the peripheral area tilted inward films on view in plan of the main surface of the optical film. In this regard, the optical film in accordance with the present invention can be applied as a coating material for protection against spying devices, a display device which is s watch mainly the front.

Numeric density of inclined protrusions can be changed on the main surface of the optical film. Thereby, it is possible to improve the visibility of the optical film in accordance with the present invention for an observer examining the optical film in accordance with the present invention from the front. In addition, the optical film in accordance with the present invention can be used as decoration.

Sloping protrusions may have different angles of inclination on the main surface of the optical film. Thereby, it is possible to further improve the visibility of the optical film in accordance with the present invention for an observer examining the optical film in accordance with the present invention from the front. In addition, the optical film in accordance with the present invention can be used as decoration.

The present invention relates also to a method of manufacturing the optical film with the structure of the moth-eye containing multiple tabs. The method includes a step (physical phase) application of physical force to the structure of the moth-eye. Thereby, it is possible to simplify the manufacture of the optical film in accordance with the present invention.

A method of manufacturing an optical film in accordance with the present invention is not limited in particular, other this is the groups, provided that this method essentially includes the above-mentioned step.

Detailed description of preferred embodiments of the method of manufacturing the optical film in accordance with the present invention are given below. The following implementation options can be used in combination.

In a preferred embodiment, step (physical phase) contains step polishing, which consists in polishing the structure of the moth-eye in a preset direction. Thus, one can further simplify the manufacture of the optical film in accordance with the present invention.

In a preferred embodiment, step of polishing includes an additional step mechanical polishing structure of the moth-eye. Thus, an optical film in accordance with the present invention, which has a pre-defined optical characteristics can be produced with a high degree of reproducibility.

Step polishing is carried out by prijemnom pressure, preferably 50 kPa (0.5 kgf/cm2or higher, more preferably 200 kPa (2.0 kgf/cm2or higher and, more preferably, 290 kPa (3.0 kgf/cm2or higher.

The clamping pressure of 50 kPa or above able to give direction to the structure of the moth-eye, which is formed from a material having a transition temperature is in a glassy state (Tg) not higher than 48°C, and protrusions which are formed with a pitch of not more than 200 nm, each with a height of not less than 255 nm.

Pressures of 200 kPa or above able to give direction to the structure of the moth-eye, which is formed from a material having a Tg not higher than 65°C, and protrusions which are formed with a pitch of not more than 200 nm, each with a height of not less than 255 nm.

The clamping pressure of 290 kPa kPa or above able to give direction to the structure of the moth-eye, which is formed from a material having a Tg of no higher than 84°C, and protrusions which are formed with a pitch of not more than 200 nm, each with a height of not less than 255 nm.

The present invention relates also to a method of controlling an optical characteristic of the optical film with the structure of the moth-eye containing multiple tabs. The method comprises a step of application of physical force to the structure of the moth-eye. Thus, you can simply give the orientation of the optical characteristics, such as reflection and scattering, optical film with the structure of the moth-eye.

The control method of the optical film in accordance with the present invention is not limited in particular, the other phases, provided that this method essentially includes the above-mentioned step.

Detailed description of preferred embodiments of a control method of an optical film in accordance with the present invention privedennyu. The following implementation options can be used in combination.

In the above-mentioned method of controlling the structure of the moth-eye is polished, preferably in a pre-specified direction. Thereby, it is possible to further simplify the task of message orientation of the optical characteristics of the optical film with the structure of the moth-eye.

In the above-described method of controlling the structure of the moth-eye, preferably, mechanically polished. Thus, a preset direction you can give the optical characteristic of the optical film with the structure of the moth-eye with a high degree of reproducibility.

In the above-described method of controlling the structure of the moth-eye is polished, preferably, when the structure of the moth-eye exert a pressure of 50 kPa (0.5 kgf/cm2or higher; the structure of the moth-eye polished, more preferably, when the structure of the moth-eye exert a pressure of 200 kPa (2.0 kgf/cm2or higher; and the structure of the moth-eye polished, even more preferably, when the structure of the moth-eye makes the pressure of 290 kPa (3.0 kgf/cm2or higher.

A pressure of 50 kPa or above able to give direction to the structure of the moth-eye, which is formed from a material having a Tg of no higher than 48°C, and protrusions which are formed with a pitch of not more than 200 nm, each with a height of not less than 255 nm.

Pressure 200 kPa or above capable of reliable is to give direction to the structure of the moth-eye which is formed from a material having a Tg not higher than 65°C, and protrusions which are formed with a pitch of not more than 200 nm, each with a height of not less than 255 nm.

The pressure of 290 kPa kPa or above able to give direction to the structure of the moth-eye, which is formed from a material having a Tg of no higher than 84°C, and protrusions which are formed with a pitch of not more than 200 nm, each with a height of not less than 255 nm.

The present invention can provide an optical film which contains the structure of the moth-eye, and optical characteristics, such as reflection and scattering, are the focus.

BRIEF DESCRIPTION of DRAWINGS

Figure 1(a) and 1(b) are schematic views representing the optical film in accordance with option 1 of the implement; Fig 1(a) is a cross-section, and Figure 1(b) is a view in plan (top view).

Figure 2(a) and 2(b) are schematic views in perspective, representing the optical film in accordance with option 1 of the implementation.

Figure 3 is a photograph obtained with a scanning electron microscope (SEM), (top view) film moth-eye on which occurs the phenomenon of adhesion.

Figure 4 is another picture scanning electron microscope (SEM), (top view) film moth-eye on which occurs the phenomenon of adhesion.

5 is a photograph obtained with a scanning electron microscope (SEM), (top view) normal film moth-eye.

F. the 6 - the picture scanning electron microscope (SEM), (top view) of the optical film in example 1.

7 is a photograph obtained with a scanning electron microscope (SEM), (cross-section) of the optical film in example 1.

Fig - range scattering of the optical film in example 1.

Fig.9 is a diagram representing a test system for measuring the scattering spectrum.

Figure 10 - the reflectance of the optical film in example 1.

11 is a photograph obtained with a scanning electron microscope (SEM), (top view) of the optical film in example 1.

Fig - picture scanning electron microscope (SEM), (top view) of the optical film in example 2.

Fig - picture scanning electron microscope (SEM), (top view) of the optical film in example 3.

Fig diagram for describing the dependencies between the pressing direction (inclined protrusions and the height of the protrusions.

Fig diagram for describing the dependencies between the pressing direction (inclined ledges and step ledges.

Fig(a)-16(c) are schematic views representing the optical film in accordance with option 2 implementation; Fig(a) is a view in plan, Fig(b) is an enlarged cross-section area, circled A on Fig(a), and Fig(c) is an enlarged cross-section area, circled VNA Fig (a).

Fig(a)-17(b) are schematic views representing the optical film in accordance with option 2 implementation; Fig(a) is a view in plan, and Fig(b) is an enlarged section of the area marked by a circle C in Fig(a).

Fig is a schematic cross section representing the optical film in accordance with option 2 implementation.

Fig is a schematic cross section representing the optical film in accordance with option 2 implementation.

Fig is a schematic sectional view representing a liquid crystal display device with a conventional film moth-eye, which has fixed on it the structure of the moth-eye.

Fig(a)-21(b) are schematic views representing the typical film moth-eye; Fig(a) is a cross-section, and Fig(b) is a view in plan (top view).

The IMPLEMENTATION of the INVENTION

The expression "numerical density of inclined ledges or sticky structures" in this application means the number of inclined ledges or sticky structures μm2.

The expression "angle of inclination of the inclined ledge" in this application means the angle formed by the Central line and a line normal to the main surface of the optical film (substrate).

The term "middle line" in this application means a straight line connecting the centre of the base (which may be the center of gravity of the base) made the a and the end of the ledge.

The term "any structure" in this application means a group of tabs, in which the ends of the projections are curved and connected. Specific examples of fused structures contain sticky structures in which not only the ends but also the projections as a whole, including end sections, merged into a single entity, and coalescent structures in which only the ends are connected, and the interior is hollow. The number of protrusions constituting the fused structure is not specifically limited. Examples of forms of stuck patterns on the form in terms of the optical film include a circle, ellipse, polygon, star, flower and any indefinite form. When each protrusion has a normal form, any structure, in all probability, must be in the form of a star, pumpkin, flower or indefinite form.

The term "transition temperature in the glassy state (Tg)" in this application means the temperature, which ensures maximum tgδ (loss tangent) in the measurement of the temperature dependence (temperature fluctuation) in the following mode: the frequency of the dynamic vibration sample (excitation frequency) is equal to 1 Hz, in stretch mode, the distance from the clamp of the clamping device is 5 mm, and the rate of temperature rise is 2°C/min in accordance with JIS K-7244 Tg was measured using a device for measuring dynamic viscoelasticity (DMS 6100, Seiko Instruments Inc.).

The present invention is explained below with reference to drawings in the following embodiments, but is not limited to these options for implementation.

(Option 1 implementation)

As shown in figure 1(a), the optical film (film moth-eye) 11 in accordance with the present embodiment has a structure 14 moth-eye formed on the surface of the film 11, and a supporting layer (bearing area) 13. Structure 14 moth-eye contains numerous tiny protrusions (protruding parts) 12. Each protrusion 12 is tapered towards the end. The pitch (distance) between vertices (upper plots) adjacent protrusions 12 is not greater than the wavelength of visible light. In other words, the protrusions 12 are periodically arranged on the surface of the film 11 with the frequency at which the spatial period of not more than the wavelength of visible light, without any gap. In addition, under ledges 12 (on the side of the substrate) is supporting layer 13.

The substrate in this case is the element, which must be attached film 11. In a preferred embodiment, the substrate is an element forming at the outer surface of the display device (in the preferred embodiment, the liquid crystal display device). Specific examples of these elements include polarizers, the protective plate, the imp is United of such material, as the acrylic layers of the hard coating deposited on the surface of the polarizers, and optical elements such as lenses.

Assuming that the peak of each protrusion 12 is designated as t, pitch p between adjacent protrusions t represents the distance between adjacent vertices of t form in terms of the main surface of the film 11, as shown in figure 1(b). In addition, the assumption that the point at which the projections 12 are in contact with each other, is the point b of the base, the height h of each projection 12 is the distance (shortest distance) from the top of the t to the plane in which the point b of the base.

Step p is not limited specifically, provided that this step is not more than the wavelength of visible light. Step p, preferably not more than 400 nm, which is the lower limit of the normal range of the wavelengths of visible light, more preferably, not more than 300 nm, and more preferably, not more than 200 nm, which is 1/2 of the lower limit of the wavelength of visible light. If the pitch p is larger than 400 nm, the light reflected or missed film 11 may be a red light (for example, light with a wavelength of 700 nm). Step p is not more than 300 nm enables to sufficiently weaken this effect, and the step p is not more than 200 nm allows almost perfectly to prevent this effect.

The height h of the special is the super is not limited to, provided that provides an enlightening effect. For example, the height h may be in the range from 100 to 400 nm. To mitigate the effects of adhesion and to prevent blue shift of light reflected or transmitted by the film 11, the height is preferably not greater than 300 nm. On the other hand, to prevent the red shift of light reflected or transmitted by the film 11, the height is preferably not less than 150 nm and, more preferably, not less than 200 nm.

In the drawings of this variant implementation, the protrusions 12 are depicted as circular conical or oblique circular conical protrusions. In this case, the individual structure (form) of each protrusion 12 is not specifically limited, provided that formed the top and dot the grounds, and the step is set not larger than the wavelength of visible light. For example, the protrusion 12 can have a shape in which the inclination from the top to the point of the substrate becomes gentle (for example, bell-shaped form and a dome-shaped form), the form in which the inclination of the ledge from the top to the point of the substrate becomes steep (for example, needle form); or the form in which the slope of the cone has steps similar to the steps.

In the present embodiment, the protrusions 12 are projections, inclined to the direction inclined to the main surface of the film 11 (Nuclon the e tabs, the tabs orientation). In other words, each of the protrusions 12 (sloping ledges) has an oblique circular cone shape, and these projections inclined relative to the same or essentially the same direction as in the plan of the main surface of the film 11.

As mentioned in the present description, the direction of the protrusions 12 are set in a direction different from the direction vertical relative to the main surface of the film 11 and the protrusions 12 is inclined relative to the desired directions.

As a result, light incident in a direction essentially parallel to the protrusions 12, enlightening experiences the action patterns 14 moth-eye. In other words, the reflection from the surface can effectively be reduced when the film 11 is observed from this location.

In contrast, the light incident in a direction essentially vertical relative to the protrusions 12, falls on parts of the back of the lugs 12 and, therefore, dissipates. In other words, when the film 11 see under this direction, there are the reflection of fluorescent light whitish image (blurry white light), unfocused image, flare, and similar problems.

As a result, it is possible to control the characteristics of the reflection and scattering of light, depending on the direction of his fall, and you can tell the orientation (anisotrop the Yu) such optical characteristics, as reflection and scattering film 11.

The mechanism through which the optical characteristics of the film 11 show the orientation can be described as follows.

As shown in figure 2, the light 31 (component parallel to the incident)incident on the film 11 in a direction essentially parallel to a straight line (the middle line 33)connecting the center with the base of the ledge 12 (in this case, base oblique circular cone and the top t of this ledge is the structure 14 moth-eye in which the refractive index continuously changes. However, it is considered that the refractive index at the interface between air and the film 11 is continuously and gradually increases from essentially of 1.0 in the air layer to the refractive index of the material forming the structure 14 moth-eye (in the case of a resin, for example, essentially of 1.5). Thus, the light 31 does not consider the interface between air and the film 11 as resistance, and the boundary of the section, which should be reflected light 31 can (essentially) to eliminate pseudorealism way. This effect is due to the fact that the amount of reflected light depends on the difference between the refractive indices of adjacent environments. As a result, most of the light 31 passes through the film 11, and the reflection coefficient at the surface of the film 11 is significantly reduced. In other words, the reflection from the ETA 31 weakened bolt action patterns 14 moth-eye and the film 11 serves as an antireflection film, such conventional film moth-eye for light 31.

In contrast, the light 32 (vertically falling component)incident on the film 11 in a direction essentially vertical to the center line 33, is in the area of the backrest of an oblique circular cone. In other words, we can assume that the light 32 enters the normal surface (the surface which is flat and has a refractive index different from the refractive index of the air layer), and the refractive index film 11 can be considered essentially constant in this direction. As a result, the film 11 has a weak antireflection effect against light 32, in this case, the light 32 is characterized by a higher dispersion.

It is believed that, in an ordinary film moth-eye, in which the projections continue vertically relative to the film surface, the light almost does not penetrate into areas of the backs of the lugs. This behavior is explained by the fact that each section of the backrest is located near the adjacent ledge. Therefore, it is considered that, in an ordinary film moth-eye optical characteristics affects only the light in a direction essentially normal to the main surface of the film.

On the contrary, in the film 11, the protrusions 12 are directed closer to the horizontal direction, and parts of the back of the protrusions 12 is configured to uverennoj the received light. Thus, optical characteristics given direction, for example, characteristics of reflectance and scattering.

As mentioned above, the protrusions 12 (sloping ledges), inclined to the main surface of the film 11, the function causing the scattering factors in relation to the scattering of light falling on the film 11. The amount of light scattered causing scattering factors (the amount of scattered light depends on the size of each inclined ledge, corner 34 of the slope (angle formed by the middle line 33 and a line normal to the main surface of the film 11 (substrate)of each inclined ledge and the number of inclined protrusions per unit area.

In addition, the inclined protrusions have a significant impact on the reflection of the light falling on the film 11, as mentioned above. In the case when the structure 14 moth-eye made of resin with a refractive index of 1.5, and the light is applied to this structure, for example, in the direction vertical relative to the protrusions 12, there is a normal reflection (reflection with the reflection coefficient is essentially equal to 4%, which is calculated taking into account the refractive index of 1.0 air and a refractive index of 1.5 resin). Thus, the reflectance is changed depending on the direction of the angle, though, the light could hardly penetrate into recess 12 with just the slight pressure from the beginning of the trend in real circumstances.

The angle of each protrusion 12 can be suitably set depending on the intensity characteristics of the scattering direction of the manifestations of the characteristics of the scattering film 11, etc. in Addition, the greater the angle of inclination of each protrusion 12 is a major focus of the optical characteristics of the film 11 and the greater the deviation direction of the optical characteristics of the film 11. As mentioned in the present description, the angle, in the preferred embodiment, is of greater importance for applications in which the film 11 for devices that require more precise control of the angle.

To make visible the direction of the optical characteristics, the angle of each projection 12 is preferably not less than 20°, more preferably not less than 30° and, more preferably, not less than 45°. However, if the tilt angle is not less than 45°, more adjacent protrusions can connect to (close to) each other (this phenomenon is called the phenomenon of adhesion), as shown in figure 3 and 4. In this case, the structure of the moth-eye is like a big step, and characterization of light scattering 31 (parallel to the incident components) may be adversely high.

As mentioned above, the inclined projections do not include protrusions, forming a sticky structure (structure, education the percent binding of the ends of the multiple tabs). In addition, each of the inclined protrusions leans in a certain direction.

The use of film 11 is not specifically limited. Because the optical characteristics of the film 11 are oriented, the film is suitable for use as a coating material for protection against spying (coating material to protect privacy) devices, display devices, which look mostly with a certain direction, for example, for mobile phones, PDA (PDA), ATM (ATMs), personal computers and car navigation systems.

Method of manufacturing film 11 is illustrated in the following examples, which actually made the film the moth-eye.

(Example 1)

First, have produced a 10-cm square glass substrate, and aluminum (Al), the material of the mold, laid siege to a thickness of 1.0 μm on a glass substrate by sputtering. Then, the aluminum is anodized and, immediately thereafter, was subjected to etching. These operations are repeated, and thereby created the anodized layer with a large number of tiny holes. In particular, the mold is produced using a process comprising, in the following order, the first anodizing, the first etching, the second anodizing, the second etching, the third anodizing, third Tr is the pressure, fourth anodizing, the fourth etching and fifth anodizing (5 anodizing operations and four operations etching). This process recurring transactions anodizing and etching gives each formed of tiny holes form, tapering the inside of the mold. In addition, the distance between the points of the base adjacent holes is not greater than the wavelength of visible light.

Relevant operations anodization was performed as follows: a solution of oxalic acid and 0.6% of the mass at a temperature of 5°C, and applied voltage of 80 C. the Size of each hole to be forming, can be controlled by controlling the duration of the anodization. With increasing duration of anodizing increases the depth of each hole, and increases the size of each hole. In this example, the duration of the anodization was 25 seconds.

Relevant operations of etching was performed as follows: a solution of phosphoric acid 1 mol/l, at 30°C, and 25 minutes.

Liquid photopolymerizable (2P) resin was applied dropwise on the mold is formed with the holes, and a TAC film (from triacetylcellulose) was applied to photopolymerizable (2P) resin so that between the resin and the film did not contain air bubbles. A TAC film (from which triacetylcellulose) serves as a supporting layer 13 (film substrate). Then, photopolymerizing (2P) resin was irradiated with ultraviolet (UV) radiation with an energy of 2 j/cm2and photopolymerized (2P) resin was aterials. Then, a laminate of solid photopolymerizable (2P) resin and a TAC film (from triacetylcellulose) was detached from the mold. Thus, photopolymerizable (2P) the resin was carried out relief copy of conical protrusions.

As mentioned above, the material for forming the structure of the moth-eye film 11 is, preferably, a resin, curing the energy of electromagnetic waves containing, for example, ultraviolet radiation and visible light. In this example, the applied resin, cured by UV radiation to reduce the effect of heat on the production process. Examples of the influence of heat include changes in the characteristics of embossed copy due to thermal expansion of the resin and the damage of the mold exposed to heat. On the other hand, the structure of the moth-eye can be generated using the heat from termotorgmash resin.

If you apply inorganic resin as the material structure of the moth-eye, the resin can not be separated from the mold after bump up the ledges. In addition, inorganic resin is harder than the organic resin and, generally, have low mechanical properties. For example, the film 1, made from inorganic resins, in all probability, must have a low resistance to abrasion fingers or steel wool on the surface. Therefore, the organic resin suitable for the present case for containing the stage abrasion.

And finally polishing the surface of the conical protrusions in a direction of attaching to them a uniform pressure, and ruled the direction of conical protrusions. Thus produced film 11. This stage polishing gave conical projections of the slope in the state of oblique circular cones, and shaped protrusions 12. The optical characteristics of the film 11 has been oriented in a preset direction. Polishing processing performed polishing device, usually used for polishing orienting layers for liquid crystal display panels, and the clamping pressure while polishing (polishing pressure roller on the structure of the moth-eye film 11) was set equal to 290 kPa (3.0 kgf/cm2).

Figure 5 shows a photograph obtained with a scanning electron microscope (SEM), (top view) normal film moth-eye, and on 6 and 7 presents pictures taken with a scanning electron microscope (SEM), (top view and cross section) of the optical film in example 1.

As shown in Figure 5, the majority of protrusions formed what about in the upward direction from the main surface of the film in a conventional film moth-eye.

On the contrary, as shown in Fig.6, the protrusions 12 is tilted, essentially in the same direction through the polishing processing of the optical film 11 in example 1. Thus, given the orientation characteristic of the reflection coefficient and the scattering film 11.

Change the tilt directions of the projections 12 were within 20° on view in plan of the main surface of the film 11. In addition, as shown in Fig.7, the angles of inclination of the projections 12 was essentially 17° in example 1. In addition, the step p of the projections 12 was 180 nm, and the height h of the protrusions 12 amounted to 373 nm.

On Fig presents the results of measurement of the scattering of the optical film 11 in example 1. Figure 9 shows a diagram representing a test system for measuring the scattering spectrum.

As shown in Fig.9, the object 23 is a layered material of the transparent glass plate 21 and the film moth-eye (film 11), located on the transparent glass plate 21. In the measurement, the light source 24 was placed with the front side of the film 11 (the side with the tabs)to make a 30° angle with the main surface of the film 11, and the light directed to the front surface of the film 11 under the direction of 30°.

When the main surface of the film see under the direction of, essentially, 30°, in the light of the incandescent lamp, the intensity of the scattering optical captivity and is the maximum, that is, the main surface of the film is the most whitish. The measuring system shown in Fig.9, this reflects the experimental result. Thereby, it is possible to obtain the result, the direction in which the intensity of the scattering is the most reflective.

The angle measurement of the film 11 is not limited to 30° and can be set accordingly, in addition to 45°. Experiments show that if the light is fed to the surface of the film 11 in the direction at an angle of 45°, ecometro 25 are accepted component of specular reflection of light from the light source, and characteristics of the scattering is not measured.

In place in the direction of forward travel of light in front of the light source 24 relative to the film 11, placed absolute absorber 26 facing against the direction of travel of light. In addition, ercomer 25 and absorber 27 is placed in the direction orthogonal to the direction between the light source 24 and the absolute absorber 26, i.e. in the direction at an angle of 60° to the main surface of the film 11 and the direction orthogonal to the direction of light propagation. In other words, ercomer 25 and absorber 27 placed opposite one another relative to the film 11, and the measurement direction of alkometra 25 and absorber 27 located opposite one another. Ercomer 25 placed on the front side the us from the film 11, and the absorber 27 placed on the reverse side of the film 11.

The absorber 26 absorbs the components of the light (transmitted light)passed through the film 11, which are part of the light falling on the film 11, with the exception of scattered components. Absorbers 26 and 27 additionally absorb components scattered from the back side of the film 11 moth-eye from light scattered on the surface of the film 11, in addition to the components scattered from the front side of the film 11.

In this experiment, was used arcomet 25 type SR-ULl (TOPCON TECHNOHOUSE CORPORATION). The measurements were performed in the following modes: angle when the measurement was 2.0°, and the distance to the object 23 was 40 see as absorbers 26 and 27 absorb the light, heading for the opposite side of the film 11, the presented measurement system can measure the amount of light (amount of reflected and scattered light)scattered on the surface of the film 11 and directed to the front side of the film 11.

As the light source 24 used a xenon lamp (MC-961C, Otsuka Electronics Co., Ltd.). Illumination of the surface of the film 11 was 3000 Lux, and the distance between the light source 24 and the object 23 was 15 cm

Schedule for parallel fall on Fig shows the measurement result in the case when the object 23 is placed so that the tabs 12 facing the light source 24. E.g. the motif, the schedule for the vertical drop on Fig shows the measurement result in the case when the object 23 is placed so that the protrusions 12 is directed to the side opposite to the light source 24.

Examples of how to assign the tilt directions of the protrusions 12 contain the way of observation of the cross section of the film 11 by using a scanning electron microscope (SEM), and a method of measuring characteristics of reflectance and scattering under different azimuthal angles and, thus, measurement of the azimuthal dependence of the characteristics of the reflectance and scattering,

As can be seen from Fig, the measurement showed that, when the protrusions 12 facing the light source 24, the amount of scattered light was small in the range of short wavelengths, and the light from the light source 24 dissipated weaker (characteristic scattering was low). In other words, the measurement showed that the reflection of light on the surface of the film 11 in this state was weakened, and the characteristic light scattering was low; thus, the film 11 has functioned as a weakly reflecting film, such conventional film moth-eye.

On the one hand, the measurement showed that when the protrusions 12 is turned in the direction opposite to the light source 24, the scattering intensity was high in the range of short wavelengths, and the light from the light source 24 Russ is also (characteristic scattering was high). This result is likely to be due to the fact that in this condition the light from the source 24 and the light fell on parts of the back of the lugs 12, and, therefore, the antireflection effect of the structure of the moth-eye with continuously varying refractive index was not shown.

Then, figure 10 shows the result of measurement of the reflectance of the optical film in example 1. The reflection coefficient R was measured using a spectrophotometer operating in the ultraviolet and visible light (JASCO Corporation, V-560) in the state in which the film 11 is fixed on a black acrylic plate. In this spectrophotometer, an entrance angular aperture of the light-receiving unit was installed 5°, and the components of the mirror reflection was measured only within 5°.

As a result, as shown in Figure 10, the measurement showed that the reflectance of the light falling on the film 11 in a direction essentially parallel to the middle line 33, (light, for which figure 10 is indicated parallel fall) effectively weakened in the whole range of visible light.

On the contrary, the measurement showed that the reflectance of the light falling on the film 11 in a direction essentially vertical to the center line 33, (light, for which figure 10 indicates the horizontal and vertical drop) was increased in the range of short wavelengths. This behavior is probably due to the influence of light scattering is in the region of short wavelengths.

Then the above method of controlling the orientation of the optical characteristics of examples 2 and 3 and comparative example 1.

(Comparative example 1)

Except that the clamping pressure when polishing was changed to 50 kPa (0.5 kgf/cm2), an optical film in comparative example 1 was produced in the same manner as in example 1.

(Example 2)

Except that the clamping pressure when polishing was changed to 100 kPa (1.0 kgf/cm2), the optical film of example 2 was produced in the same manner as in example 1.

(Example 3)

Except that the clamping pressure when polishing was changed to 150 kPa (1.5 kgf/cm2), the optical film of example 3 was produced in the same manner as in example 1.

The numerical density of inclined protrusions was measured using pictures taken with a scanning electron microscope (SEM), (top view)submitted on 11-13, respectively, in comparative example 1 and examples 2 and 3. In particular, the number of inclined protrusions considered within the area of 20 μm2dimension scanning electron microscope (image magnification SEM, with dimensions of approximately 4 μm × 5 μm), and this number was divided by the area of measurement. The measurement was performed using a field of a scanning electron microscope FE-SEM (S4700, Hitachi High-Technologies Corporation).

In financial p is Tata, in comparative example 1, the numerical density of inclined protrusions was 0.05 units/mm2; sloping ledges almost not observed, and the optical characteristics of the film did not show orientation.

On the other hand, in example 2, the numerical density of inclined protrusions was 0.87 pieces/mm2and, in example 3, the numerical density of inclined protrusions was 2.45 pieces/mm2. In addition, in examples 2 and 3, the optical characteristics of the film showed the orientation.

As mentioned above, not all the tabs 12 must be sloped. Part of the protrusions 12 can be inclined, and the rest of the tabs 12 may be essentially vertical to the main surface of the film 11.

For reliable message oriented optical characteristics of the film 11, the numerical density of inclined protrusions is preferably not less than 0.5 units/mm2more preferably not less than 0.7 units/mm2even more preferably, not less than 0.8 units/mm2and, particularly preferably, not less than 0.85 units/mm2based on the results in comparative example 1 and examples 2 and 3.

In addition, the measured numerical density sticky structures on pictures taken with a scanning electron microscope (SEM) (top view)submitted on 11-13, respectively, in sravnitel the nome example 1 and examples 2 and 3. The measurement was performed in the same manner as in the method of measuring the numerical density of inclined ledges.

As a result, in comparative example 1, the numerical density sticky structures 0.41 pieces/mm2; in example 2, the numerical density of the fused structures was 0.26 pieces/mm2; in example 3, the numerical density of the fused structures was 0.20 units/mm2.

As mentioned above, the application of the clamping pressure that can provide direction, reduces the number of coalescent structures. This result is probably due to the fact that stuck patterns are separated in a state of stress caused by the clamping pressure.

In order to reliably inform the direction of the optical characteristics of the film 11, the numerical density of the fused structures, preferably not more than 0.40 pieces/mm2more preferably, not more than 0.35 units/mm2even more preferably, not more than 0.30 pieces/mm2and, particularly preferably, not more than 0,26 pieces/mm2based on the results in comparative example 1 and examples 2 and 3. If the numerical density sticky structures exceeds 0.40 pieces/mm2then the optical characteristics of the optical film in accordance with the present invention it is impossible to give a direction.

If the numerical density stuck to the Minister of the tour is, 2.1 units/mm2or more, the optical characteristics do not show orientation, and the film may be whitish, when observed from any direction.

Each of the fused structures have the form of stars, which radially extends from the center gourd shape or flower, which consists of circles or ellipses, superposed one upon the other, or unspecified irregular shape on view in plan of the main surface of the film 11.

Change the directions of inclination of inclined ledges were in the range of 30° in example 2 and in the range of 30° in example 3 in terms of the main surface of the film 11.

The following is a description of the dependencies between the pressing direction (inclined protrusions) and the structure of the moth-eye.

Assuming that the step of tiny holes formed on the mold, in other words, the step p of the protrusions has a fixed value (for example, step = 180 nm), the height h of the protrusions corresponds to the following dependence shown in Fig; that is, the greater the height h, the lower clamping pressure while polishing to make the oblique orientation of the tabs.

Assuming that the depth of tiny holes formed on the mold, has a fixed value (for example, depth = 400 nm), the step p of the projections corresponds to the following dependence shown in Fig; that is, the larger the step p, in the above clamping pressure while polishing to make the oblique orientation of the tabs.

The coefficient relief up tiny holes on the resin material is essentially 60%. If the depth of petite holes equal to 400 nm, the height h of the protrusions is equal to, essentially, 240 nm.

Below is a description of the results of the study dependencies between software orientation (inclined protrusions) and the structure of the moth-eye actually made films.

(Example 4)

In addition, the step of conical protrusions was 100 nm, the height of the conical protrusions was 200 nm, and the clamping pressure when polishing has changed, the optical film of example 4 was produced in the same manner as in example 1.

(Example 5)

In addition, the step p of the projections was 200 nm, the height h of the protrusions to the polishing was 200 nm, and the clamping pressure when polishing has changed, the optical film of example 5 was produced in the same manner as in example 1.

(Example 6)

In addition, the step p of the projections was 200 nm, the height h of the protrusions to the polishing was 200 nm, and the clamping pressure when polishing has changed, the optical film of example 6 was produced in the same manner as in example 1.

(Example 7)

In addition, the step p of the projections was 200 nm, the height h of the protrusions to the polishing was 300 nm, and the clamping pressure when polishing has changed, the optical film of example 7 was produced in the same manner as in example 1.

(Example 8)

p> In addition, the step p of the projections was 200 nm, the height h of the protrusions to the polishing was 300 nm, and the clamping pressure when polishing has changed, the optical film of example 8 was produced in the same manner as in example 1.

(Example 9)

In addition, the step p of the projections was 200 nm, the height h of the protrusions to the polishing was 400 nm, and the clamping pressure when polishing has changed, the optical film of example 9 was produced in the same manner as in example 1.

(Example 10)

In addition, the step p of the projections was 200 nm, the height h of the protrusions to the polishing was 400 nm, and the clamping pressure when polishing has changed, the optical film of example 10 was produced in the same way as in example 1.

Table 1 shows the results of estimation of dependence between the clamping pressure when polishing and pitch p and the height h of the protrusions. Each of the clamping pressure in table 1 is the lower limit clamping pressure to give an oblique orientation of the protrusions, and the units of pressure kgf/cm2.

Table 1
Step p (nm)
100200400
The height h (nm) 100---
2001,01,0not less than 3,0
300-1,0not less than 3,0
400-0,52,5

In the range in which the height h does not exceed 100 nm, and in which the step p is greater than 400 nm, the structure of the moth-eye has weak anti-glare effect and useless. Thus, the evaluation is not performed.

The results show that the clamping pressure is required to increase as the step p becomes larger, and the clamping pressure can be reduced as the height h increases, in order to give focus to the tabs.

The following is a description of the results of the estimation of the dependence between the clamping pressure when polishing and temperature of transition to the glassy state (Tg) of the resin material, actually made films having different Tg values.

(Example 11)

Besides the fact that the structure of the moth-eye made using molds and material (resin A), featuring the, for example by transferring them from used in example 1, and clamping pressure when polishing has changed, the optical film of example 11 was produced in the same manner as in example 1.

(Example 12)

Besides the fact that the structure of the moth-eye made using molds and material (resin B), different from the used in example 1, and the clamping pressure when polishing has changed, the optical film of example 12 was produced in the same manner as in example 1.

(Examples 13)

Besides the fact that the structure of the moth-eye made using molds and material (resin C), different from that used in example 1, and the clamping pressure when polishing has changed, the optical film of example 13 was produced in the same manner as in example 1.

(Example 14)

Besides the fact that the structure of the moth-eye made using molds and material (resin D), different from that used in example 1, and the clamping pressure when polishing has changed, the optical film of example 14 was produced in the same manner as in example 1.

Resin A-D are similar in that each of them is a UV-curable acrylate monomer or oligomer (KAYARAD Series, Nippon Kayaku Co., Ltd.), but these resins have different physical properties such as Tg. Resin A has a certain value Tg. The value of Tg of the resin B was 48°C, the Tg value of the resin was 65°C, and the Tg value of the resin D was 84°C.

The step of tiny holes formed on the mold, used in examples 11-14, was 200 nm, and the depth of the mentioned holes was 520 nm. In other words, the step p of the projections in examples 11-14 also was 200 nm. In addition, the height h of the protrusions to polishing in examples 11-14 was 255 nm.

As mentioned above, the holes on the mold used in this case were deep, and boldly copied the projections 12 was high. Therefore, on ledges, in all probability, should influence the clamping pressure, and, in the case of solid material, the ability to create direction is reduced.

The results are presented in table 2. Each of the clamping pressure in table 2 indicates the lower limit clamping pressure to give an oblique orientation of the tabs, the unit pressure is kgf/cm2.

Table 2
Resin AResin BResin CResin D
Tg (°C)Uncertain Tg456584
Clamping pressure (kgf/cm2)neither the e 3,0 0,52not below 3.0

Table 2 shows that the lower Tg of the resin, the easier it is attached to the oblique orientation of the protrusions, and the higher the Tg, the higher, usually, should be clamping pressure while polishing to make the oblique orientation of the tabs.

Table 2 additionally shows that the clamping pressure is not below 0.5 kgf/cm2(50 kPa) is able to give direction to the structure of the moth-eye, which is made from a material having a Tg of no higher than 48°C, and the tabs which have a pitch p of not more than 200 nm and the height h to polishing at least 255 nm.

In addition, table 2 shows that the clamping pressure is not lower than 2.0 kgf/cm2(200 kPa) is able to give direction to the structure of the moth-eye, which is made from a material having a Tg not higher than 65°C, and the tabs which have a pitch p of not more than 200 nm and the height h to polishing at least 255 nm.

Table 2 additionally shows that the clamping pressure is not lower than 3.0 kgf/cm2(290 kPa) is able to give direction to the structure of the moth-eye, which is made from a material having a Tg of no higher than 84°C, and the tabs which have a pitch p of not more than 200 nm and the height h to polishing at least 255 nm.

If applied solid resin, in particular, the applied resin A or resin D, the tabs were bent in some cases the medium of the multiple polishing processing.

In General, the UV-curable resin containing more of the active sites of polymerization, typically, has a higher density of crosslinking after polymerization and, consequently, has a higher Tg and provides a more solid product after curing.

(Option 2 implementation)

The optical film in accordance with the present embodiment has the same structure as the optical film in accordance with option 1 of the implementation, except that the tabs patterns moth-eye are different. Therefore, the following detailed description concerning only those features that differ from the features of option 1 implementation. In addition, the description of the elements that lead to the same results as in option 1 implementation shown using similar positions.

As shown in Fig(a), the main surface of the optical film 11 in accordance with the present embodiment is divided into two areas 15 and 16, as the number (seven-segment) "8". The protrusions 12 in the region 15 and the tabs at the region 16 are tilted in different directions. As shown in Fig(a) and 16(b), the tabs 12 tabs 12L) in the left pane 15 is tilted to the right, in other words, to the axial line 35, which is the dividing line between the regions 15 and 16, on the front view of the film 11. On the contrary, as shown in Fig(a) and 16(c), the tabs 12 tabs 12R) in the right pane 16 is tilted to the left, in other words, to the centerline 35, on the front view of the film 11. As mentioned above, the protrusions 12L and 12R tilted inward film 11 on view in plan of the main surface of the film 11.

Thus, ribs 12L and 12R is tilted towards the observer, considering the film 11 from the front. As a result, the film 11 serves as an antireflection film for an observer, considering the film 11 from the front. On the other hand, the observer, considering the film 11 to the left or to the right, sees lots of back projections 12L and 12R. As a result, in this case, the characteristic of the light scattering on the surface of the film 11 is high.

In the present embodiment, the protrusions 12 on the peripheral area of the film 11 (preferably, the peripheral area of the display device) tilted inward film 11 on view in plan of the main surface of the film 11. In other words, the apex of each protrusion 12 is on the domestic portion of the film 11 (preferably, a display device), in comparison with the center of the base of the ledge. Thus, the optical film 11 in accordance with the present invention is suitable as a coating material for protection against spying devices, display devices, which look mostly at the front. Examples of these devices include portable the disorder, for example, mobile phones, and PDAs (personal digital secretaries), ATMs, personal computers, and portable computers. This version of the implementation is also suitable as a coating material for protection against spying for desktop computers, representing on the display device secret information.

As shown in Fig(a), the main surface of the optical film 11 in accordance with the present embodiment can be divided into three areas 15, 16 and 17 like tricolor (as the national flag of France). The protrusions 12 in the left pane 15 and the tabs in the right pane 16 is tilted in opposite directions (both inside film 11) in the same manner as in the case shown in Fig. On the other hand, the protrusions 12 in the Central region 17 are vertical to the main surface of the film 11, as shown in Fig(b).

Thus, this version of the implementation can be used as a coating material for protection against spying for the device, observed mainly in the front.

For slope of the protrusions 12 in different directions on the same main surface as shown in Fig and 17, the main surface of the film 11 is polished in several directions.

Each of the divided areas may be separately provided with a display device and PL is ncoi 11. Thus, this version of the implementation can be applied to large-scale display device composed of multiple display devices, for example, the information display device. In addition, this version of the implementation can improve the characteristic of the angle of the large-sized display device from the front.

As mentioned above, the optical film 11 in accordance with options 1 and 2 implementation may have optical characteristics, such as reflection and scattering direction, if the structure of the moth-eye.

In addition, in embodiments 1 and 2 of implementation, the characteristic scattering film 11 can be controlled in accordance with the representation of the image. As mentioned in the present description, options 1 and 2 implementation, the film 11 give a characterization is not random scattering, and the tabs patterns moth-eye feature with high accuracy (line) in the direction of polishing. As a result, the direction of scattering can be controlled.

Options 1 and 2 implementation, the angles of inclination of inclined protrusions need not be the same on the main surface of the film 11, and may be different on the main surface of the film 11. As shown in Fig, for example, the angles of inclination of the projections 12 can be decreased gradually from the peripheral area 41 to centralmemorytest 42 film 11.

In this case, the inclined protrusions safer tilted relative to the observer, considering the film 11 from the front. Therefore, the visibility of the film 11, that is, the subject observed through the film 11 (for example, a display device)can be improved when the film 11 see the front.

In addition, in embodiments 1 and 2 of implementation, the numerical density of inclined protrusions on the main surface of the film is not necessarily constant 11 and can be changed on the main surface of the film 11. As shown in Fig, for example, the numerical density of the protrusions 12 may be gradually reduced from the peripheral area 41 to the Central section 42 of the film 11.

In this case, the film 11 may be safer to provide antireflection effect for the observer, considering the film 11 from the front. Therefore, the visibility of the film 11, that is, the subject observed through the film 11 (for example, a display device)can be improved when the film 11 see the front.

To give different angles of inclination of the inclined protrusions and/or to change the numerical density of inclined protrusions on the main surface of the film 11, the clamping pressure change when the polishing film 11.

In addition, the film 11 can be provided to the figure, due to the difference of refractive indices, by appropriately changing the direction and/or is a lot of pressure polishing film 11. For example, a polished section of the film 11 can be done whitish, and the degree of Berezoutski can be changed depending on the intensity of polishing (clamping pressure). Thus, the film 11 can be represented image. As mentioned in this application, control of the refractive index film 11 allows you to apply options 1 and 2 implementation for internal and external decorations. The film 11 with a represented image can be fixed on a transparent glass.

Options 1 and 2 implementation, the size of the area which formed sloping ledges, are not specifically limited, provided that it is possible to observe the orientation of the optical characteristics of the film.

In a preferred embodiment, the method of forming the inclined ledges is the way in which the tabs exert physical effort. In addition to the above method of mechanical polishing film with use of the device, for example, a polishing device, a valid application of the method by which man polishes a film of soft fibrous material such as cloth or tissue paper.

Alternatively, the inclined protrusions can be formed using the mold with miniature holes obliquely formed in the mold by laser.

The present application claims the priority of p is patent application No. 2009-175703, filed in Japan on 28 July 2009 in accordance with the Paris Convention and the national legislation of the countries mentioned, the contents of which are entirely incorporated herein by reference.

EXPLANATION of SYMBOLIC NOTATION

11: optical film

12, 12L, 12R: projections

13: bearing layer

14: embossed type structure "eyes of a butterfly" (the structure of the moth-eye)

15, 16, 17: region

21: a transparent glass plate

23: object

24: the light source

25: ercomer

26, 27: the absorber

31, 32: light

33: average line

34: slope angle

35: centerline

41: peripheral area

42: the Central plot.

1. Optical film containing
the relief-type structure of the eyes of a butterfly" (the structure of the moth-eye)containing multiple tabs,
while the protrusions include numerous sloping ledges, which are tilted relative to the main surface of the film,
moreover, the inclined protrusions inclined, essentially in the same direction as in the plan of the main surface of the film;
this sloping ledges are located on the peripheral area of the optical film, and
sloping protrusions on the peripheral area tilted inward films on view in plan of the main surface of the optical film.

2. The optical film according to claim 1, in which the optical whom she has an optical characteristic, which shows the directivity in a direction inclined relative to the main surface of the film.

3. The optical film according to claim 1 or 2, in which the slanting ledges formed by the application of physical force to the tabs.

4. The optical film according to claim 1 or 2, in which the sloping protrusions correspond to the numerical density of 0.5 units/mm2or more.

5. The optical film according to claim 1 or 2, in which the numerical density of inclined ledges changes on the main surface of the optical film.

6. The optical film according to claim 1 or 2, in which the sloping protrusions have different angles on the main surface of the optical film.

7. The optical film according to claim 1 or 2, in which
the structure of the moth-eye contains sticky structure,
when this sticky structure contains a number of tabs, the ends of which are interconnected, and
any structure corresponds to the numerical density of 0.40 pieces/mm2or less.

8. A method of manufacturing an optical film with a relief-type structure of the eyes of a butterfly" (the structure of the moth-eye), which includes numerous protrusions, the method includes a step consisting in the fact that apply physical force to the structure of the moth-eye in order to tilt mentioned numerous protrusions,
this oblique projections inclined relative to the main surface of p is Enki and tilted, essentially, in the same direction as in the plan of the main surface of the film;
this sloping ledges are located on the peripheral area of the optical film, and
sloping protrusions on the peripheral area tilted inward films on view in plan of the main surface of the optical film.

9. A method of manufacturing the optical film of claim 8 in which the said step contains a step of polishing, namely, that polished the structure of the moth-eye in the pre-specified direction.

10. A method of manufacturing the optical film according to claim 9, in which the aforementioned step of polishing includes an additional step, namely, that mechanically polished the structure of the moth-eye.

11. A method of manufacturing the optical film according to claim 9 or 10, in which the aforementioned step of polishing performed with prijemnom pressure of 50 kPa or higher.

12. A method of manufacturing the optical film according to claim 11, in which the aforementioned step of polishing performed with prijemnom pressure of 200 kPa or higher.

13. A method of manufacturing the optical film according to item 12, in which the aforementioned step of polishing performed with prijemnom pressure of 290 kPa or higher.

14. The method of controlling an optical characteristic of the optical film with a relief-type structure of the eyes of a butterfly" (the structure of the moth-eye), which includes numerous protrusions, the method with the holding step, namely, that
apply physical force to the structure of the moth-eye in order to tilt mentioned numerous protrusions,
this oblique projections inclined relative to the main surface of the film and tilted essentially in the same direction as in the plan of the main surface of the film;
this sloping ledges are located on the peripheral area of the optical film, and
sloping protrusions on the peripheral area tilted inward films on view in plan of the main surface of the optical film.

15. The method of controlling an optical characteristic of the optical film 14, in which the structure of the moth-eye polished in a pre-specified direction.

16. The method of controlling an optical characteristic of the optical film 14 or 15, in which the structure of the moth-eye mechanically polished.

17. The method of controlling an optical characteristic of the optical film 14 or 15, in which the structure of the moth-eye polished with the clamping pressure of 50 kPa or higher.

18. The method of controlling an optical characteristic of the optical film 17, in which the structure of the moth-eye polished with the clamping pressure of 200 kPa or higher.

19. The method of controlling an optical characteristic of the optical film p, in which the structure of the moth-eye polished with the clamping pressure of 290 kPa or higher.



 

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30 cl, 93 dwg

FIELD: physics.

SUBSTANCE: optical film has a base with convex structural components which are two-dimensionally and orderly formed directly on its surface, and a solid coating layer on the surface of the base, having said structural components. The surface of the solid coating layer has a continuous wavelike shape which matches the shape of structural components of the surface of the base. The maximum amplitude (A) and minimum wavelength (λ) of the continuous wavelike surface are essentially constant, and the ratio (A/λ) of the maximum amplitude (A) to the minimum wavelength (λ) is greater than 0.002 but not greater than 0.011. The film has full light transmission factor of 92% or higher, dullness of 1.5% or less, internal dullness of 0.5% or less and opacity of 0.7% or less.

EFFECT: improved anti-glare properties and contrast.

18 cl, 22 dwg

FIELD: electricity.

SUBSTANCE: method for manufacture of the element produced by way of micro-treatment includes the following stages: generation of a resist layer on the stamping mould, exposure and development of the layer generated on the stamping mould for formation of a structure within the resist layer, placement of the stamping mould with a structure created in the resist layer onto an electrode and the stamp mould etching for an uneven shape formation on the stamping mould surface to obtain an element produced by way of micro-treatment. An uneven shape is formed on the electrode surface so that at the etching stage anisotropic etching is performed in a direction slanted relative to the stamping mould surface. The etching device contains a reservoir for the etching reaction and the first and the second electrodes positioned on opposite sides in the reservoir. The first electrode has an accommodation surface for accommodation of the substrate having an uneven surface shape so that anisotropic etching is performed in a direction slanted relative to the substrate surface.

EFFECT: provision for manufacture of an element having uneven structures slanted relative to the normal and the substrate surface at least in two different directions or having multiple areas wherein the structures slanting direction may be varied.

9 cl, 59 dwg

Optical element // 2451311

FIELD: physics.

SUBSTANCE: optical element has a base and primary and secondary structures lying on the surface of the base and representing a protrusion or depression. The primary structures are arranged in form of a plurality of rows of tracks on the surface of the base with spacing equal to or less than the wavelength of visible light. The secondary structures are smaller than the primary structures. Other versions of the optical element are possible. The secondary structures can be made between the primary structures and on adjacent areas, and the primary structures are connected to each other by the secondary structures. The spatial frequency of the secondary structures is higher than the frequency obtained based on the period of arrangement of the primary structures. The primary structures are made periodically in the configuration a hexagonal or quasi-hexagonal array or a tetragonal or quasi-tetragonal array and lie along the orientation of the corresponding symmetry. The secondary structures can be arranged on surfaces of the primary structures. The lower parts of adjacent structures can overlap each other.

EFFECT: improved antireflection characteristic and high technological effectiveness.

21 cl, 56 dwg, 1 tbl

FIELD: physics.

SUBSTANCE: liquid reservoir has a transparent wall and a microrelief layer, having a microrelief structure and lying on the outer surface of the wall, and a protective layer covering the microrelief structure, arranged in order from the wall. The protective layer has refraction index which is essentially equal to that of the liquid to be stored in the reservoir.

EFFECT: reduced reflection from the surface of the reservoir and longevity.

22 cl, 19 dwg

FIELD: physics.

SUBSTANCE: relief microstructure of the surface has protrusions and depressions, where in the first cross direction of an area of the surface there is an average of at least one transition from a protrusion to a depression or vice versa in every 20 mcm, and in the second cross direction of a pattern which is perpendicular to the first direction, there is an average of at least one transition from a first zone to a second zone or vice versa in every 200 mcm. The microstructure is characterised by that in the first direction the lateral arrangement of transitions is non-periodic and that protrusions mainly lie in the same top relief plateau and the depressions mainly lie in the same bottom relief plateau. Due to scattering effects, the surface relief microstructures are suitable for displaying images with a sharp transition between negative and positive images.

EFFECT: well distinguished and saturated image colours and absence of rainbow colours.

18 cl, 39 dwg

FIELD: physics.

SUBSTANCE: method according to the invention includes the following steps: providing a mould for making a soft contact lens, the mould having a first mould half which forms a first moulding surface, which forms the front surface of the contact lens, and a second mould half which forms a second moulding surface, which forms the rear surface of the contact lens, said first and second mould halves configured to be connected to each other such that a cavity forms between said first and second moulding surfaces; feeding a mixture of monomers of lens forming materials into the cavity, where said mixture of monomers includes at least one hydrophilic amide-type vinyl monomer, at least one siloxane-containing (meth)acryalide monomer, at least one polysiloxane vinyl monomer or macromer and about 0.05 to about 1.5 wt % photoinitiator, where the lens forming material is characterised by the capacity to be cured by UV radiation having intensity of about 4.1 mW/cm2, in about 100 s; and irradiating the lens forming material in the mould for 120 s or less with spatially confined actinic radiation in order to cross-link the lens forming material to form a silicone hydrogel contact lens, where the contact lens made has a front surface, formed by the first moulding surface, opposite the rear surface formed by the second moulding surface, and a lens edge formed in accordance with spatial confinement of the actinic radiation.

EFFECT: making silicon hydrogel contact lenses whose edges are defined not by touching moulding surfaces, but by spatial confinement of radiation, which enables to reuse the mould to make high-quality contact lenses with good reproducibility.

18 cl

FIELD: physics.

SUBSTANCE: method involves local laser deposition of a layer of transparent or opaque material on the surface. Laser deposition is carried out on mirror reflecting adjacent surfaces or coatings of plates already mounted in an interferometer in the gap between surfaces. The gap is filled with a medium which forms a film upon laser irradiation, and the surface is locally irradiated with laser radiation. Thickness of the deposited layer of material can be controlled during deposition by interference measurement of deviation of the length of the optical path of the light beam between the mirror reflecting surfaces of the interferometer plates from the resonance length for the interferometer. The laser beam can scan the surface, wherein its intensity can be modulated with the length of the optical path between the mirror reflecting surfaces.

EFFECT: correcting the shape of surfaces of optical components already mounted in an optical device.

3 cl, 1 dwg

FIELD: physics.

SUBSTANCE: laser radiation focused on the surface of a photosensitive layer is modified on depth in proportion to the power density of the radiation propagating in the photosensitive layer. Before entering a focusing lens, the laser radiation is collimated into a parallel beam whose diameter is smaller than the entrance aperture of said lens and is shifted in parallel to the optical axis by a value where one of the edges of the longitudinal section of the exposing radiation cone in the photoresist layer becomes parallel to the optical axis of the focusing lens. In the second version, an immersion liquid is further placed in the interval between the output lens of the focusing lens and the surface of the photosensitive layer.

EFFECT: high diffraction efficiency of kinoform lenses by reducing loss on counter slopes of zones by increasing the gradient of the slopes formed directly during direct laser writing.

2 cl, 4 dwg, 1 tbl

FIELD: physics.

SUBSTANCE: method according to the invention involves adding to a reaction mixture an effective amount of a compound which reduces protein absorption, hardening said mixture in a mould to form a contact lens and removing the lens from the mould with at least one aqueous solution.

EFFECT: making silicone-hydrogel contact lenses with low protein adsorption, which are comfortable and safe to use, and do not require high production expenses.

23 cl

Optical monocrystal // 2495459

FIELD: physics.

SUBSTANCE: monocrystals are designed for infrared equipment and for making, by extrusion, single- and multi-mode infrared light guides for the spectral range from 2 mcm to 50 mcm, wherein a nanocrystalline structure of infrared light guides with grain size from 30 nm to 100 nm is formed, which determines their functional properties. The monocrystal is made from silver bromide and a solid solution of a bromide and iodide of univalent thallium (TIBr0.46I0.54), with the following ratio of components in wt %: silver bromide 99.5-65.0; solid solution TIBr0.46I0.54 0.5-35.0.

EFFECT: reproducibility and predictability of properties, avoiding cleavage effect, resistance to radioactive, ultraviolet, visible and infrared radiation.

FIELD: measurement equipment.

SUBSTANCE: method involves shaping of a reflector based on organic plastic material and non-organic substance with reflection coefficient of not less than 0.9 by preparing a mixture of initial components under pressure. As organic plastic material there used is a mixture of fluorine and polycarbonate; as non-organic substance - titanium dioxide, at the following component ratio, wt %: polycarbonate 100; fluorine 3.5-5.0; titanium dioxide 0.5-1.0. Forming can be performed by pressing at pressure of 800 to 1500 atm and at temperature of 240-270°C to thickness of not less than 2 mm or by casting at pressure of 750 to 1500 atm and at temperature of 280-290°C to thickness of at least 2 mm. Polycarbonate with melt flow-behaviour index of 2-60 g/10 min can be used as polymer material.

EFFECT: enlarging processing methods, temperature interval of processing, reducing cost and material consumption.

4 cl, 1 dwg

FIELD: physics.

SUBSTANCE: antireflection film has on its surface a moth eye structure which includes a plurality of convex portions, wherein the width between the peaks of adjacent convex portions does not exceed the wavelength of visible light. The moth eye structure includes a sticky structure formed by connecting top ends of the convex portions to each other and the diameter of the sticky structure is smaller than 0.3 mcm. The aspect ratio of each of the plurality of convex portions is less than 1.0, and the height of each of the plurality of convex portions is shorter than 200 nm.

EFFECT: reduced light scattering.

29 cl, 69 dwg

FIELD: chemistry.

SUBSTANCE: germanium monocrystals are grown in crystallographic direction [111] after holding at melting point for 1-2 hours, with temperature gradient at the crystallisation front in the range of (10.0÷18.0) K/cm, which provides dislocation density on the level of (2·104-5·105) per cm2.

EFFECT: invention enables to obtain germanium monocrystals with considerable increase in signal reception area due to directed introduction of a given concentration of dislocations into the grown crystal and conversion of said dislocations from standard crystal defects to active elements of infrared optical devices.

3 dwg, 1 tbl

FIELD: physics.

SUBSTANCE: antireflection film has, on its surface, a moth-eye structure including a plurality of convex portions such that a width between vertices of adjacent convex portions is not greater than a wavelength of visible light, wherein the moth-eye structure includes a sticking structure formed when tip end portions of the convex portions are joined to each other. The diameter of the sticking structure is greater than or equal to 0.3 mcm and density of the number of sticking structures per unit area of the plane of the antireflection film is lower than 2.1 units/mcm2.

EFFECT: reduced light scattering.

29 cl, 69 dwg

Contact lenses // 2486920

FIELD: medicine.

SUBSTANCE: invention refers to an ophthalmic product represented by a sealed and sterilised package comprising a packaging solution and a soft hydrogel contact lens immersed in the packaging solution. The soft hydrogel contact lens comprises a polymer matrix, a first leaching polymeric lubricant and a second leaching polymeric lubricant, wherein the second leaching polymeric lubricant has an average molecular weight at least 3 times greater than the average molecular weight of the first leaching polymeric lubricant. The packaging solution contains approximately 0.1 wt % to approximately 1 wt % of a hydroxyl-containing polymer increasing the viscosity and specified in the group consisting of hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methylcellulose, and mixtures thereof, polyethylene glycol having a molecular weight of 400 or less, α-oxo-polyatomic acid or a salt thereof in an amount sufficient to provide a reduced oxidative degradability of polyethylene glycol in the packaging solution with the viscosity from approximately 2.0 to approximately 8.0 cps at 25°C, one or more buffer agents in an amount sufficient to provide a pH of the solution equal to 6.0 to 8.0, and wherein the packaging solution has an osmolality from approximately 200 to approximately 450 mOsm/kg. What is also described is a method for producing the soft contact lens.

EFFECT: helping with the initial discomfort of an individual who wears the contact lenses and comforting the above individual for a period of time longer than 6 h.

15 cl, 6 ex

FIELD: polymer materials.

SUBSTANCE: invention provides composition containing from about 50 to about 80% of component selected from group consisting of di(meth)acylate of ethoxylated bisphenol A, di(meth)acylate of non-ethoxylated bisphenol A, di(meth)acylate of propoxylated bisphenol A, epoxy(meth)acrylates of bisphenol A, and mixtures thereof; from more than 0 to about 30% of component selected from group consisting of tetrahydeofuryl (meth)acrylate, isobornyl (meth)acrylate, cyclohexyl (meth)acrylate, and mixtures thereof; from more than 0 to about 15% of component selected from group consisting of dipentaerythritol penta(meth)acrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, tri(meth)acrylate of ethoxylated or propoxylated trimethylolpropane, tri(meth)acrylate of ethoxylated or propoxylated glycerol, pentaerythritol tetra(meth)acrylate, bis-trimethylolpropane tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, and combinations thereof. Such composition is suited to manufacture eyeglass lenses.

EFFECT: expanded possibilities in manufacture of polymer-based lenses, including multifocal ones.

21 cl, 3 tbl, 18 ex

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