Multi-layered article

FIELD: printed matter of special format.

SUBSTANCE: multi-layered article comprises the layer sensitive to the laser radiation, marking member, e.g., diffraction and/or holographic structure, reflecting layer, and print formed in the second layer and/or in the layer sensitive to the laser radiation. The layer sensitive to the laser radiation has markers that are made by means of laser radiation and precisely positioned with respect to the marking member.

EFFECT: enhanced reliability of protection.

27 cl, 40 dwg

 

Description

The invention relates to a multilayer product, in particular to multilayer films, characterized by the signs of the generic concepts of paragraph 1 of the claims, as well as the way to improve the security layered products from falsification, characterized by the signs of the generic concepts of paragraph 22 of the claims.

From the document DE 3738330 A1 is known a method of laser marking, is used for applying the pigments on the surface, and pigments pigment coating at different temperatures change their molecular structure and are painted in different colours. With the aid of laser radiation locally provided concrete surface temperature, which can be obtained colored laser marking.

In the document DE 4410431 A1 describes a method by which the identity card, by means of laser marking is applied personal data, and identity card, includes applied an automatic element of the copy protection. When laser marking is applied distinguishing mark (marking label) in the form of a sequence of numbers, in this part of the sequence of digits is applied in the element of copy protection, and another part of the sequence of digits in a related field card is for identification. Laser marking is carried out by local removal of the metallization layer of the metal element of the copy protection, or by often treated area of the ID card.

In document EP 0219011 B1 describes a special method for laser marking card for ID. In this way in various transparent layers of the card by means of laser applied black marks. In interacting transparent layers in this way get the parallactic image.

In the document GB 2240948 And described laser marking card for ID. Laser marking is performed in this case by removing the different colored layers. The resulting laser marking labels appear in the form of color coding.

In the document DE 4131964 A1 describes a laser marking multilayer film with a metal layer and a holographic structure. Marking is done by the local often, and delete layers.

From the document EP 0420261 A2 there are various measures to improve the protection against fraud for systems with foil hot stamping holographic structure. Among other things, this document describes that the structure of a hologram or other layers of the lacquer film by laser processing whodats the laser-induced marking label. Also described other methods of individualization films with the structure of the hologram, which can be used as a Supplement or alternative to, which is what is used individualizing creaser, which gives the structure of the hologram individualized outer contour. The disadvantage of the described methods of individualization is that applied on the substrate film without the involvement of the sample for comparison it is impossible to recognize whether a falsification.

Performing multi-color markings in the coating is known from publication WO 96/35585 and WO 94/12352, performing monochrome labels known from documents EP 0327508, EP 0190997 and DE 3738330. In this regard, as described next.

From WO 96/35585 known different versions of plastic products, in particular massive products or coatings that contain a mixture of different pigments. In various embodiments, the implementation of a mixture of pigments consists of three components pigments, namely yellow pigment, Magenta pigment and a cyan pigment. The expense of laser processing is a color marking on the product of plastic. Color marking occurs due to bleaching of the pigments by laser processing. Conditions of laser processing are specifically due to a change in length of the s wave, to get different colors. Appropriate suitable for the application of a specific wavelength is pre-determined by measurements of light absorption in pigment, namely, is determined by the wavelength of the absorption maximum absorption of the pigment. Accordingly pigments are used, which detect only a single maximum absorption. Thus must be guaranteed that when laser processing is obtained a color that matches the color of the laser radiation, and the duration of the laser processing and laser intensity for each color can have the same value. In the described embodiment, using a mixture of pigments, such as a yellow pigment, Magenta pigment and a cyan pigment, for laser processing used purple laser radiation at a wavelength of 430 nm, blue laser radiation at a wavelength of 470 nm yellow laser radiation at a wavelength of 575 nm and referred to as orange laser radiation at a wavelength of 650 nm. This way, in the laser processing by an appropriate installation of the laser wavelength at other equal conditions should be implemented different color marking label on the plastic products. Colors arise through a complex mixing of pigments, while obestsvechivaya is at the respective wavelengths. Methods of obtaining various colors when using a limited number of pigments, are not disclosed.

From the publication WO 94/12352 also known solution, according to which the product is made of plastic, which contains the pigment mixture and which can be made as a solid body or as a coating by laser processing using radiation with different wavelengths creates a color-coded marking. Vetoablechange is due to the fact that the pigments change color in the laser processing due to a change in state of the pigment. Conditions of laser processing are selected each time randomly. If this does not reveal the way to create any color purposeful way. In addition, the number thus obtained colors are very limited.

From the document EP 0327508 known method, which is sensitive to laser radiation pigment and insensitive to laser radiation, the pigment is contained in two separate placed one on another in layers or in the same layer, and the expense of laser processing, the pigment And bleached, while insensitive to laser radiation, the pigment has not been bleached or bleached to a very small extent. In the laser processing receive color coded, but only one color marking, i.e. a maximum of TLDs is a color image. The known method does not change the conditions of laser processing to create various colors.

From the document EP 0190997 B1 is known a technique in which the layer of synthetic material, made in the quality of the coating, a metal plate, or a plate of synthetic material contains an additive that, when laser processing is colored due to the state transition of the pigment from one color to another or due to blackening. You cannot get a color-coded with different colors.

From the document EP 0416664 B1 is known a method of creating a black marking labels by laser marking plastics or film layers. Marking labels occur at the expense caused by the laser blackening contained in the plastic sensitive to laser radiation component - molybdenum sulfite. From the document DE 19522397 A1 is known a method of applying light markings by laser processing of layers of synthetic material containing pigments. This is done through laser whitening contained in the material pigments.

From documents EP 0537668 and DE 8130861 U1 known method in which the layer structure of the transfer film locally remove layers by laser processing so as to receive markings.

In addition to the CSO, for example, from document EP 0741370 B1, DE 4333546 A1 or US 4911302 known method, in which by means of laser processing of multilayer products create marks by laser-induced melting of the material to such markings move then still in the melted state to another product.

The basis of the invention lies in the goal of improving security against falsification layered products, such as media for recording data, such as the ID card or other similar means.

This problem is solved according to the invention in a multi-layer product according to paragraph 1 of the claims, as well as the way to improve security against falsification of the multilayer product according to paragraph 22 of the claims.

Under the layered product can be understood multilayer film, for example, transfer film, for example, foil hot stamping, or a layered film (the laminate), and the product is coated, preferably the product of synthetic material covered with a film. The surface of the substrate may be a layer. By positioning accurate wiring, and also the exact landing and/or the exact coordinates of the marks created in sensitive to laser radiation layer by laser irradiation, the so-called Indus the focused laser marking, creates high-precision composite individualized mark regarding existing before laser processing in the layer structure of the element marking labels, which, for example, can be obtained as diffractive and/or holographic structure, if necessary, with the effect of motion, or as a printout, or as a reflective element, i.e. the region with high light reflection and/or with a high refractive index, and which is composed of already existing item marking labels and laser-induced marking. The latter preferably is in the form of an image saturated color. Exact register in the preparation can be controlled immediately, preferably by simple observation from the outside, without the use of expensive devices to establish the stability (reliability, durability). This means that this special interaction induced by laser marking with the corresponding marking element is achieved by the combinatorial effect, which is quasienergies effect. Special combinatorial visual effects that can arise due to the overlap of diffraction and laser-induced color images.

Positioning exact eyeliner induced by laser marking mo is should be performed by the respective control without the weight of the laser beam. Preferably can be operated electronically, namely, depending on the determination of the actual location existing in the layer structure of the element marking label on which is ultimately coordinate.

The laser can be controlled by defining the parameters of the background layer, preferably define print (format printing) or diffraction pattern, and/or by determining the parameters sensitive to laser radiation layer or a part of a laser-induced image, in particular, through image processing. The preferred way to control position (position), the direction of incidence of the laser beam, the laser wavelength, duration of exposure, number of pulses and/or the intensity of the laser radiation.

Colour markings can be of various colors. Colored marking may also be more or less continuous color transitions. In particular embodiments, the execution of each color code has a certain hue, which in a specific area or throughout the marking is permanent.

Particularly high protection against falsification can be obtained in the case when induced by the laser marks the transportation is performed as the color code namely, when the marking is in the form of multicolor labeling. Of particular advantage in this regard is provided in the case, when induced by the laser marking is performed by laser-induced bleaching of the dye substances present in sensitive to laser radiation layer.

To get the image saturated color, in one of the embodiments is provided that is sensitive to laser radiation material is in the form of a mixture of various sensitive to laser radiation components, preferably at least three different components of the dyes. Each of these components, preferably each component of the mixture, has the ability whitening by laser at a particular corresponding component in the conditions of laser processing, preferably using cyan dye, which is made as a dye, bleach red laser radiation; Magenta (Magenta) dye, which is made as a dye, bleach green laser radiation; and a yellow dye, which is made as a dye, bleach blue laser radiation. Alternatively, instead of such bleach dyes can also be used dyes with laser at specific the La component conditions of laser processing can change the color, preferably by changing the state of the pigment.

In particularly preferred embodiments, the implementation of the marking element marks that already exist in the multi-layer structure that runs as a diffractive or holographic structure, preferably as a diffractive or holographic structure with a characteristic limited by the external circuit. A preferred way, the structure can be performed according to the type of the guilloche (mechanical engraving interlocking wavy lines) or this engraving can be contained in a diffraction or holographic structure. Additionally, there are ways to run, in which the marking element marks already present in the multilayer structure, an alternative or in addition to a diffraction or holographic structure is made by printing.

Especially light stability control (strength) is shown in the variants perform, when induced by laser marking and correlated with available prior to laser processing in the multi-layer structure of the marking element marks are adjacent to each other in projection on the plane of the layers with high accuracy, preferably placed directly one on top of another adjacent next to each other. Alternatively, or in certain other areas teleoperation can be made in this way, that induced by laser marking and other marking element marks completely or in areas overlap with high accuracy, preferably placed on the same line one above the other.

Particularly preferred embodiments of that induced by laser marking and other marking element is made accordingly in the form of lines in the projection plane of the optical layers are recognized as finely-tuned, compound, preferably passing a continuous image of a line, i.e. both the line segment optically detected as a continuation of each other. Additionally, there are options for implementation, which is induced by laser marking and other marking element positioned relative to one fictitious or specifically available total vertical lines, especially when induced by laser marking with other marking element is designed as a common sequence of letters or numbers by type words marking or multi-digit number marking. To increase resistance against falsification is possible, in particular induced by laser marking, in addition to perform as the microlettering. Such variants are more resistant to falsification, because the microlettering can be implemented by printing technology only with high technical is low-cost, and when personalization can be repeated for specific document information (e.g., owner name, ID etc). Induced by laser micro-font can be performed multicolor, preferably with the corresponding smooth transition of tones.

A particularly high resistance against falsification is manifested in the nature of the execution, when induced by laser marking and correlated with different element marks are engraved. The preferred way these engraving adjusted to each other with high accuracy, so that the projection on the plane of the layers is optically detected composite structure engraving, adjusted with high precision.

In other embodiments, the implementation provides that induced by laser marking and existing in the layer structure of the marking element is made accordingly in the form of a flat field. As induced by laser marking, and the other element of the marking can be performed respectively as a striped border with one other flat fields. Adjacent field preferred are optically identifiable as different, for example, by different colors or different patterns, preferably as a flat reflective area or as diffraction and/or as the goal of the graphical structure. Flat fields already present in the multilayer structure before laser processing can be performed in the reflective layer, for example, alternating as the flat reflecting layer and as a diffraction structure. The preferred way, when considered from the outside, they are positioned above the laser induced flat fields. The reverse arrangement is also possible in the variants of implementation. Induced by the laser in the flat field preferably performed with alternating different colors. Under different viewing angles appear different optical effects that, when applied only labelling elements or only induced by the laser marking may not be reached.

Provide options for implementation, which are induced by the laser part of the image by accurate color-matched to the corresponding part of the image, which, for example, formed in a background layer or covering layer or through these layers. The preferred way may provide that next to each other are placed through the exact register a large number of laser-induced component parts of the image, and thus, many of these exactly fitted to each other component parts of the image is composed of a multilayer image.

Special optionselect achieved in variants of implementation, which provides that induced by the laser part of the image is colorless transparent or tinted transparent color, and associated with it an integral part of the image is located in the layer above or below in the direction perpendicular to the plane of the layers, on one line or offset in the lateral direction. Under the layer below or above the mean background layer or covering layer which, for example, runs as a reflective layer, preferably with a diffractive structure, is placed in a limited area.

In preferred embodiments, implementation, especially if layered product sold in the conversion film, for example, in the foil hot stamp or laminate or coating consisting of this film, it is preferably provided that, when laser processing is changed extremely sensitive to laser radiation layer, namely, preferably only by selective bleaching or selective color change when changing the state of the dye. The preferred way available to other layers such as protective layers, for example, one or more upper protective layers remain unchanged, i.e. there is no damage to these layers by laser impacts is provided. In the variants of implementation, which has a reflecting layer, this reflecting layer is preferably designed so that at the proper pointing of the laser beam, the latter can pass through this layer and, if necessary, can affect placed under him sensitive to laser radiation layer. Particularly high protection against tampering can be obtained in the case when sensitive to laser radiation layer or induced by laser marking is located, seen in the direction of the layered product or film-coated substrate under diffractive and/or holographic structure, and/or a reflective layer, and particularly preferred is when induced by laser marking is placed directly adjacent to these above structure or layer.

Under the reflective layer or reflective field refers to a layer or an area that has a high light reflection and/or high refractive index. When it comes to the layer or region, which may be made of metal or a metallic compound, for example, aluminum, chromium, silver, zinc sulfide, titanium oxide, etc. are also possible composition of other materials, for example, compounds of Germany, to connect the clusters of silicon, etc. We can talk about flat, preferably by sputtering layer or regions. Such a layer or region can be performed interconnected or separated from other areas. Also possible implementation in which the property of reflection are due to the use of the respective particles or the like, for example, metal pigments. Below, preferred embodiments of described with reference to the drawings showing the following:

Figure 1-5 - types in the context of various films, hot stamping, respectively sensitive to laser radiation layer

6-10 - types in the context of various multilayer films respectively sensitive to laser radiation layer

Fig. 11a-d spatial representation (a and C) and in section (b and d) of the first variant implementation of layered images obtained by laser processing, and figa and b illustrates the design in areas sensitive to laser radiation layer and the second layer before laser processing, and figs and d is the same after laser treatment,

Figa-d and 13a-d spatial representation and in section, respectively figa-d, for the second and third embodiments,

Figa-d spatial representation and in section, respectively figa-d, for the fourth vari the NTA execution

Figa-b - type horizontal projection of the example running on figa-d,

Figa-b - spatial representation, respectively figa-d, for a fifth variant of the run,

Fig and 18 species in the horizontal projection of the sixth and seventh embodiments,

Fig - view in horizontal projection eighth variant execution. In the following, first of all with reference to figure 1-10 describes the film hot stamping and multilayer films, in the structure of layers which can be formed by laser induced individualizing label with the aim of increasing protection from fraud and create a combinatorial visual effects. In conjunction with these drawings also describes the main stages of the method of laser processing, through which the processed film, i.e. sensitive to laser radiation layer, to create the corresponding individualizing the label. Instead of films, hot stamping can also be used and other transferable film.

First of all, variety is shown in the drawings, the film is described in terms of their layer structure and material composition of the individual layers.

In the case shown in figure 1-5 films, talking about films, hot stamping. Foil hot stamping, shown in figure 1, includes a carrier film 1, the removed layer 2, protective layer 3, the sensitivity is output to the laser radiation layer 4, the background layer 5 and an adhesive layer 6.

In the case of the carrier film 1, it is mainly about the film from a polyester of a thickness of from 6 to 100 μm, preferably a thickness of from 19 to 38 μm. This carrier film 1, one above the other, are layers 2-6. They are applied in the manufacture of film hot stamping in a known manner.

Remove the layer 2 is a separating layer. It is formed mainly as a layer that become soft when exposed to heat, which makes the coating film hot stamping on a substrate removing other layers from the carrier film 1. Remove the layer 2 has, in General, the thickness is significantly greater than 1 μm.

The protective layer 3 is formed as a protective layer of lacquer. While we are talking about a transparent layer of varnish, whose task is to protect the open surface of the object, decorated foil hot stamping, mechanical damage and chemical damage. The thickness of the layer is preferably in the range from 1 to 2 microns.

Sensitive to laser radiation layer 4 is formed as a so-called layer of colored lacquer (farblich). In this case we are talking about colored pigments and/or provided with other coloring systems or dye layer of varnish thickness, preferably from 3 to 10 μm. Pigments or other coloring or dyes of this layer of colored lacquer with p the power of the laser radiation, wavelengths which preferably lie in the visible range, have the possibility of selective bleaching and/or changes in a different color. Preferably the concentration of the pigments of this layer 4 of varnish is in the range from 3 to 15% relative to the solid body. The binder system of this layer 4 of varnish cannot optical change under the influence of the laser, so that the irradiated areas occurs only color contrasting markings without damaging the film. The film is not significantly damaged either on the surface or inside.

The background layer 5 made in the form of so-called second layer of colored lacquer. This layer is colored differently than sensitive to laser radiation layer 4. Layer 5 is, for example, white or ivory, if sensitive to laser radiation layer 4 is black or gray. Layer 5 serves primarily as a light auxiliary layer for the colors produced by laser radiation in sensitive to laser radiation layer 4. The thickness of the layer 5 is preferably in the range from 15 to 20 microns.

There is a possibility not to provide the background layer 5 as sensitive to laser radiation layer 4 on the entire surface of the foil hot stamping and thereby throughout the decorated surface in the same colour. On the contrary, the layers 4 and 5 can be accounted for the Lena separately, and also differently colored sections.

In the case of an adhesive layer 6, we are talking about conventional and known adhesive layer on the conversion film or film hot embossing, the thickness of which is approximately 1 to 10 μm, and the adhesive layer to the film hot stamping is made so that it is glued only with the corresponding heat effect.

Layers 2-6 can be made according to the following recipes:
Remove the layer 2 (separation layer):
Toluene99.5 parts
The of ester wax (dropping point 90°)0.5 parts
The protective layer 3 (protective layer of varnish):
Methyl ethyl ketone61,0
Diablosport9.0 parts
Methylmethacrylat (Tg=122°)18.0 parts
Dispersion of polyethylene (23% in xylene)

(softening point 140°)
7.5 parts
High-molecular dispersant additive

(40%, amine number 20)
0.5 parts
The plasticizer (aluminosilicate)4,0 part
Sensitive to l is sername radiation layer 4

(the first layer of colored lacquer):
Methyl ethyl ketone34,0 part
Toluene26.0 parts

The ethyl acetate13.0 parts
Nitrate cellulose (low viscosity, 65% in alcohol)20.0 parts
Linear polyurethane

(Fp (softening point)>200°C
3.5 parts
High-molecular dispersant additive

(50%, amine number 20)
2.0 part
For example: pigment blue 15:40.5 parts
pigment red 57:10.5 parts
pigment yellow 1550.5 parts
The background layer 5 (second layer of colored lacquer):
Methyl ethyl ketone40.0 parts
Toluene22,0 part
The ethylene-vinyl acetate-tripolymer (Fg.=60°C)2.5 parts
Polyvinyl chloride (Tg:89°)5.5 parts
Polyvinyl chloride (Tg:40°)to 3.0 parts
Dispersing additive (50%, acid number 51)1.0
Titanium dioxide (d-3,8-4,2 g/cm3)26.0 parts
The adhesive layer 6:
Methyl ethyl ketone55,0 parts
Toluene12.5 parts
Ethanol3.5 parts
The polyvinyl acetate (softening point 80°)6.0 parts
Butyl/methyl methacrylate (Tg:80°)8.0 parts
Utilitarian resin (Tg:63°)to 3.0 parts
Methacrylonitrile (Tg:80°)5.0 parts
Unsaturated polyester resin

(softening point 103°)
3.5 parts
Silicon dioxide3.5 parts

Transfer film, in this particular case, the film hot stamping, is applied in the usual way mainly to the substrate and so that the adhesive layer 6 facing the surface of the substrate. The adhesive layer 6 forms then, when the hot embossing, adhesive bonding with the surface of the substrate. Then the carrier film 1 after softening by heat during hot embossing deleted layer - stiraetsa. In this film, hot stamping, deposited on the surface of the substrate, the protective layer 3 forms then converted from the substrate upper surface of the embossed film.

Film hot stamping, depicted on the Phi is.2-4, in contrast to the film, shown in figure 1, are differently formed the background layer. In the example of figure 2 the background layer formed as the reflection layer 5r. In the special case of the reflective layer is made as a metal reflecting layer. A reflective layer may be transparent or partially transparent for certain spectral ranges. He may have a higher refractive index than the other layers, and therefore has a high fluorescence. In the example in figure 3 layer 5C is provided as an additional layer of varnish, which preferably is transparent. In addition, a reflective layer 5, which has a zonal diffractive or holographic structure 5b. In the exemplary embodiment according to figure 3 this structure 5b is executed as a component layer 5C varnish and adhesive layer 6 and the intervening layer. Alternative or additional diffractive structure may also be formed as a component layer 5C of varnish and/or sensitive to laser radiation layer 4, and/or the adhesive layer 6. In these cases, the diffractive structure can be formed, as shown, to separate sections or as a continuous layer.

In the example in figure 4 in the background layer 5C, in a limited area, placed the imprint of the 5d, and sensitive to laser radiation layer is shifted in the lateral direction relative this is the imprint of the limited sensitive to laser radiation region 4A.

Figure 5 shows the film hot stamping with a modified structure of the layers. The structure of layers similar to those shown in figure 3, however, it changed the sequence of layers, namely, so that is sensitive to laser radiation layer 4 placed on the side of the reflection layer 5r, facing to the substrate. The layers are placed one on another in the following sequence: carrier film 1, the removed layer 2, protective layer 3, intermediate layer 5C, the reflection layer 5r, sensitive to laser radiation layer 4, the background layer 7 and the adhesive layer 6. In adjacent to each other areas sensitive to laser radiation layer 4, a reflective layer 5 and the intermediate layer 5C formed diffractive structure 5b. It can be formed as a diffraction grating. An alternative structure 5b may also be formed as a holographic structure. In figure 5 presents the example of the implementation of the diffractive structure 5b is formed in the manufacture of the film, whereby it is embossed diffraction patterns in the intermediate layer 5C, and then applied to the reflection layer 5r, for example, by spraying. The reflection layer 5r in areas outside of the diffractive structure is designed as a flat reflecting layer 5r. It preferably has a thickness of <1 μm. It is transparent or partially transparent under the definition the military angles at least for certain spectral ranges. After applying the reflection layer 5r is applied sensitive to laser radiation layer 4. Made so diffractive structure 5b formed directly adjacent to each other areas of the layers 5C and 4. When observing the diffraction patterns appear, depending on the angle of illumination and observation, changing optical effects.

In the case of the film figa layers are ordered in the following sequence: supporting layer 1, delete the layer 2, protective layer 3, which are sensitive to laser radiation layer 4, a reflective layer 5r, sensitive to laser radiation layer 4, an additional lacquer layer 7 and the adhesive layer 6. Sensitive to laser radiation layers 4 formed on both sides of the reflection layer 5r, can be made identical, that is, a reflective layer in this case is in General sensitive to laser radiation layer. However, sensitive to laser radiation layers can be performed in different ways. In adjacent to each other areas sensitive to laser radiation layer 4 and the reflecting layer 5 is formed diffractive structure 5b. Alternatively, the structure 5b can be formed and as a holographic structure. Increased protection against fraud in this example implementation is ensured by the fact that two-sensitive laser is th emission layer, which may be formed identically or differently, are adjacent to the diffractive or holographic structure. The lacquer layer 7, which is optional, is formed as a transparent layer or as a light auxiliary layer. Alternatively, the varnish layer 7 and the adhesive layer 6 can be omitted, and the second is sensitive to laser radiation layer 4 shown on figa under the reflecting layer 5 may be made as sensitive to laser radiation of the adhesive layer.

In the film fig.5b layers are ordered in the following sequence: carrier film 1, the removed layer 2 that is sensitive to laser radiation layer 4, an additional layer 5C of varnish, the reflection layer 5r, the adhesive layer 6. Layers 5 and 6 can be formed from identical or different materials. Under sensitive to laser radiation layer 4 in this embodiment refers to a protective layer of varnish, which is formed sensitive to laser radiation due to the fact that it contains the appropriate comparable pigments. In adjacent to each other areas additional layer 5C lacquer reflective layer 5 and the adhesive layer 6 formed diffractive structure. It can be done as a diffraction grating. An alternative structure 5b can be performed as a holographic structure.

After carrying captive the and, in this case, foil stamping, deposited on a substrate, carry out laser processing to create transparent or colored marks are sensitive to laser radiation layer 4. To a specific position within sensitive to laser radiation layer 4 to form a specific marking, preferably color coded, this site is irradiated with laser radiation.

In the case of laser processing film with the structure of the layers according to figure 5, the laser irradiation is performed via a reflective layer, through the diffractive structure 5b, inclusive. The laser beam is directed preferably perpendicular to the top plane of the film. The reflection layer 5r is transparent for laser radiation, in particular, when the perpendicular irradiation. Grating or holographic structure 5b layer, forming in the rest of the area of the reflection layer 5r, also permeable to laser radiation, and radiation, however, may also partially reflected from the diffraction patterns to a greater or lesser extent. Sensitive to laser radiation layer 4 placed under the layer forming the rest of the area of the reflection layer 5r, even within the diffraction patterns 5b and under it, is changed by laser irradiation so that a lot is changing color due from the Livonia or selective color change.

Further describes the bleaching process, as it is shown in the drawings, the examples of implementation in the respective sensitive to laser radiation layer.

When bleaching at the first stage is formed blue, or green, or red color marking due to the fact that this area is exposed to a specific wavelength of the laser, whereby bleached specific pigment component. To create the blue color should otmelivatsja yellow pigment component. To do this, use a blue laser beam. For whitening requires a certain minimum intensity. In addition, should not be exceeded a certain pulse width. So the first step is to get the green color-coded, must otmelivatsja Magenta pigment component. To do this, use the green laser beam. So the first step is to get the red color-coded, must otmelivatsja cyan pigment component. It uses the red laser beam.

To obtain this plot color-coded in color cyan or Magenta or yellow, this section on the second stage is processed by the laser, namely the laser wavelength, whereby bleached pigment component, not yet bleached in this place. If the first stage is formed blue color which I marking, the plot is not ambelin cyan pigment component and a Magenta pigment component. To use the color cyan in this area, at this second stage should otmelivatsja Magenta pigment component. It is a green laser beam. Thus, in this place turns out cyanic color marking. If the second stage instead of the cyan color-marking must be received purple colour coded, blue color code, obtained in the first stage must be processed red laser beam. Thus in this place bleached cyan pigment, so in this area remains unbleached Magenta pigment. Thus in this area turns purple colour coded.

Accordingly obtained from the first stage green color marking, which is formed from the remaining unbleached cyan pigment and a yellow pigment, to obtain a cyan color-coded or yellow color-coded, namely, by processing a blue laser beam or the red laser beam.

Accordingly, the red color marking obtained at the first stage, the second stage can be converted into yellow or Magenta color-coded, namely, through the laser is first processed in the second stage, the green laser beam or a blue laser beam.

To get on the site, treated on the first and second stage, the transparent area, that is to get a white area, if the background layer 5 white, need to be processed in the third stage this section of the laser beam, the wavelength of which is installed so as to bleach the pigment component remaining on this site unbleached after the second stage, i.e. yellow color marking must otmelivatsja blue laser beam, a Magenta color-coded - green beam, and a cyanic color coded - red laser beam.

Similarly handled then sensitive to laser radiation layer 4 other adjacent areas to get different color marks in layer 4 embossed film. Thus, you can create a full color image.

Laser treatment can also be used to create the dye or dyes sensitive to laser radiation layer by changing the color of a color marking or full color image. Laser treatment can be performed appropriately consecutive stages of the method. As dyes, that is, coloring substances, accepted pigments. They are often not soluble and, as a rule, we are talking about inorganic substances. But as dyes taking the are also and in most cases, soluble organic matter. The color change is carried out every time when special conditions of laser radiation, which is then used in the laser processing on a separate stages.

Laser processing conversion or embossed film to create a color markings alternative can be carried out before application of the film, namely, first of all, when the protective layer 3 and/or intermediate layer 5C is made as a layer that is opaque to laser radiation, or a layer that is opaque to laser radiation in a certain wavelength range, or an additional absorbing ultraviolet rays protective layer. Laser processing is carried out then before applying the film, and the laser beam is directed on the reverse side of the film, i.e. on the background layer 5 or the adhesive layer 6, and thereby sensitive to laser radiation layer 4 is processed with the other hand to create a color-coded the same way. The background layer 5 and the adhesive layer 6 is transparent or at least partially transparent when used for the appropriate laser radiation.

Accordingly, you can create a color-marking and laminate. This laminate is shown in Fig.6-10. Laminate figure 6 contains the so-called covering film 30, an optional intermediate layer 31, sensitive to l is sername emission layer 40, the intermediate layer 50, forming the background layer, which is also optional, and the adhesive layer 60, which is also optional. In the process of laminating the laminate with an adhesive layer 60 facing the surface of the substrate, is applied to the substrate. Under the adhesive layer 60 is formed by adhesive bonding with the surface of the substrate. Covering film 30 then forms the upper protective layer, the surface of which, facing away from the substrate to form the outer surface of the film. Covering film 30 and remains there after the application of the laminate. It corresponds to the protective layer 3 embossed film of figure 1. Sensitive to laser radiation layer 40 corresponds sensitive to laser radiation layer 4, that is, the first layer 4 of the embossed lacquer film of figure 1. The intermediate layer 50 corresponds to the background layer 5, that is, the second layer 5 of the embossed lacquer film of figure 1. The adhesive layer 60 corresponds to the adhesive layer 6 embossed film of figure 1. The laminate shown in Fig.7 and 8, corresponds to the variation of the laminate in Fig.6, the background layer which is changed accordingly, as the background layer in the film hot stamping of figure 2 and 3.

The laminate shown in figure 9, has a structure of layers with different relative to 6-8 sequence located one on top of another layer. The sequence of layers corresponds to the structure of plank the hot stamping, shown in figure 5. This layer 70 is an optional background layer.

Figa illustrates an example implementation that is different from the embodiment in figure 9, with the sequence of layers corresponding to the structure of the film hot stamping shown in figa.

The laminate is presented on figure 10, illustrates a variant of the laminate in figure 9. In this example implementation is provided by covering film 30 with a deposited film hot stamping. This caused the film hot stamping replaces layers 31, 50 or 50r, 40, 70 and 60 provided in the laminate in figure 9, the respective layers of film hot stamping. In the film hot stamping used for the production of a laminate, in contrast to the embossed film on figure 5, the reflection layer 5r and sensitive to laser radiation layer 4 are arranged in reverse order, so that the laminate in figure 10, respectively laminate in figure 9, the reflection layer 5r is turned on from the substrate side is sensitive to laser radiation layer 4. Accordingly, the way in the other depicted embodiments, the laminate in figure 10 adjacent to each other areas of the layers 4 and 5 are also made of the diffraction structure 5b. The lacquer layer 5 is made as a transparent layer.

Laminate on figa is structured similarly to the laminate in figure 10. However, the example implementation figa provided covering film 30 with a deposited film hot stamping, which is structured similar to film hot stamping in the example implementation figa. This tape hot stamping, printed on the covering film 30, replaces the layers 31, 40, 50 or 50r, 40, 70 and 60 provided in the laminate on figa, by means of respective layers of film hot stamping. Laminate on figa has a number of layers in the following sequence: covering film 30, the adhesive layer 6, an optional layer 5 of varnish, sensitive to laser radiation layer 4, a reflective layer 5r, sensitive to laser radiation layer 4, an additional layer 5C varnish and protective layer 3. Sensitive to laser radiation layers 4 formed on both sides of the reflection layer 5r, can be made identical, that is, the reflection layer 5r in this case is this sensitive to laser radiation of a shared layer. However, sensitive to laser radiation layers 4 can also be formed differently. While the lacquer layer 5 is performed as a transparent layer or as a light auxiliary layer.

Laminate on fig.10b illustrates an example implementation in which the covering film is also deposited film hot stamping. This caused the film hot stamping formed similarly to the film 5. It replaces the layers 31, 40, 50 or 50r, 40, 70 and 60 provided in the laminate on figa, the film layers of gorjachekatannyj. Laminate on fig.10b has a number of layers in the following sequence: covering film 30, the adhesive layer 6, an optional layer 7 of varnish, sensitive to laser radiation layer 4, a reflective layer 5, an additional layer 5C varnish and protective layer 3. When this varnish layer 7 is performed as a transparent layer or as a light auxiliary layer.

Laser processing of the laminate is carried out appropriately, as described for the embossed film, that is, through an appropriate serial whitening or sensitive to laser radiation color change contained in the sensitive to laser radiation layer 4 dyes, i.e. pigment components or other sensitive to laser radiation dyes.

Below with reference to 11-16 described preferred embodiments. In the embodiments represented mainly transferable film with the structure according to figure 1-5 or laminates with the structure according to Fig.6-10. Fig. 11 and 12 show a layered structure very schematically and shown, respectively, only the top layer and the bottom layer. They represent sensitive to laser radiation layer 4 and located parallel to another layer, which is formed as a reflective layer 5r and has on the areas of the diffraction structure. In the layers adjacent to the lattice the structure, formed diffractive structure 5b.

In the example implementation depicted in FIGU-11d, proceed from the film, which is sensitive to laser radiation layer 4 formed more or less covered with green or other color in area 4A. The background layer 5 is in the field below it, a reflective layer with a diffraction structure 5b. The background layer 5 may be made as a metal layer, which may be formed directly under sensitive to laser radiation layer, mainly by spraying on it. By means of laser radiation in sensitive to laser radiation layer 4A are formed accurately positioned separate marks in the form of alternating, spaced from each other, a square field 10x and 10y. By an appropriate laser treatment under various conditions is achieved in that field 10x formed blue, preferably cyan, and field 10y - yellow. The area around the field 10x, u not processed by the laser and retains its original color, that is still, for example, green. Due to the precise positioning of the laser beam ensures that the field 10x, u formed accurately positioned relative to the diffraction areas. Field 10x, a more or less transparent, so that on the basis of light diffraction on the diffraction structure 5b is Snicket game color depending on the overlapping colors and dependent on the wavelength of reflection of the incident rays. Due to the fact that the background layer 5 has a striped placed with an exact fit to the laser-induced fields 10x, a, the diffraction field 5b and metal, seemingly mirror region, in conjunction with colored laser radiation surfaces are obtained picture image, changing depending on the irradiation angle and the angle of observation.

In the particular embodiment depicted in FIGU-d may be provided that the metal layer is formed only in the individual separated from other areas 5r as a reflective layer, and the rest region is formed as a lattice structure. Sensitive to laser radiation layer 4 can be irradiated by laser irradiation so that the alternating field 10x, u will otmelivatsja different, then there will be painted in different colors. These fields 10x, u, forming a laser-induced color-marking may be placed in such a way that they are when observed in the direction perpendicular to the plane of the layers, are located on the same line above the reflective fields 5A. Depending on the irradiation angle and the angle thus obtained changing optical effects.

Another example is sushestvennee, depicted on figa-d, sensitive to laser radiation layer 4 through sensitive to laser radiation whitening are circular field 10x, u in different color in alternating sequence. They are placed with precise positioning, when observed in the direction perpendicular to the plane of the layers above the diffraction fields 5b, which in the top view also have a circular contour. Diffraction field is formed in the reflective layer 5, which is located under sensitive to laser radiation layer 4, preferably directly beneath it.

On figa-d shows an example implementation that is different from those shown in figa-d the fact that the diffraction structure 5b is formed in a circular flat reflecting field 5r, and a circular laser-induced field 10x, u placed with exact positioning on a circular flat reflective fields 5r.

In the example implementation depicted in FIGU-14d, proceed from the film, in which the partially transparent reflective layer is located over sensitive to the laser layer 4. Sensitive to the laser layer 4 formed more or less covered, for example, green or other color, in region 4A. A reflective layer 5 has on the areas of the diffraction structure 5b, and a reflective layer 5 are separated from each other separate fields 5r form the Rowan as a flat layer without diffraction patterns. A reflective layer 5 applied by spraying directly onto sensitive to laser radiation layer 4. The diffraction structure 5b formed in the reflective layer sensitive to laser radiation layer 4 and extends into sensitive to laser radiation layer 4.

Laser treatment through the reflecting layer 5 through, exclusively in the field of flat reflective fields 5r, exact positioning of the laser head, located under him sensitive to laser radiation layer 4 are formed with high precision on the position of the individual marks in the form of alternating spaced from each other a square field 10x and u. These laser-induced marking in the form of a square field 10x and u in the example implementation figa-d, are located exactly on one line and with exact register, in respect of their size and position, under a flat reflective fields 5r reflecting layer 5. The corresponding laser processing under various conditions is achieved in that field 10x and u are different colors, for example, field 10x - cyanide and field a yellow. The area around the field 10x, u not subjected to laser processing and retains its original color, e.g. green.

Based on light diffraction in the diffraction structure 5b in conjunction with various colors field 10x, u arises games the color, which depends on the type of lighting and angle of illumination and observation, depending on the light source L. thus respectively obtained changing the picture image. A diffraction pattern or induced by laser color picture alternately observed, for example, the tilt of the film, so that the angle of illumination and/or viewing angle changes, as schematically shown in figa and 15b. In the position shown in fig.15b, surface 5r are presented in color, and the diffraction structure is not valid. In the position shown in figa contrast, the observed diffraction pattern and colour surfaces with superimposed, at least partially.

Figa-d illustrates an example implementation, the modified compared with the options on figa-d and 15a-b so that in the reflective layer 5 are rectangular in horizontal projection of the diffraction field 5b, for which high accuracy is positioned induced by the laser field 10x, u.

In the example implementation depicted in Fig sensitive to laser radiation material layer 4 is located in the area bounded by a rectangular contour. Layer 4 outside the region 4A is transparent, so there is an imprint 5d formed in this area in the background layer. Imprint 5d can be formed in a separate background layer megol Inoi film or directly on the surface of the substrate. In the case of fingerprint 5d, we are talking about verbal image Bank von Island" and the verbal image "Pass-Nr.", the latter is located between the two parallel also printed or fictitious, that is implied, lines 5df alignment.

Thanks to the precise positioning without the weight of the laser beam, you can continue marking with precision in the micron region, relative to the imprint 5d sensitive to laser radiation region 4A by selective bleaching or selective color change. When this is done marking, which continue both lines 5df alignment of the imprint, which are arranged on both sides of the sensitive to laser radiation field 4A or there are fictitiously as imaginary line alignment, field 4A as induced laser line 10f alignment. Between the lines 10f with accurate wiring is the corresponding induced by laser marking 10x, u, in the depicted embodiment, the sequence of digits "5764937". While individual figures 10x, u can be formed in different colors or have the appropriate character changes color, for example, due to different bleaching in different parts numbers, or different color change, or on the basis of the relevant clearance beneath them or translucent the Osia imprint. Separate figures 10x, u can also be formed in the microlettering. This ensures high protection against tampering.

An example implementation Fig is a variant shown in Fig example implementation, and to improve protection against fraud over sensitive to laser radiation layer 4A is located diffraction structure 5b. It can be formed directly adjacent to sensitive to laser radiation layer, for example, in the reflecting layer, which napalan in this limited area, or in the reflective layer that covers the entire shown in Fig surface in this example implementation. This reflecting layer formed in the depicted embodiment only in the field, covering sensitive to laser radiation field 4A as a diffraction structure, which is also transparent. Laser processing is carried out by laser irradiation through a reflective layer or through the diffraction structure 5b. Thus, as in the example implementation Fig, are generated exactly fitted induced by laser marking. Due to the fact that induced by laser marking in the example implementation Fig is a diffractive structure, and it is directly connected with the corresponding SL is eat, which has a marking, provides increased protection from fraud.

In the example implementation Fig also implemented high-precision mapping of the diffraction fields induced by laser color surfaces, and in this example provides the laser-induced saturated color image of the portrait as a laser-induced image u. Induced by the laser, the image formed is sensitive to laser radiation layer 4. Provides diffractive elements 5b, performed as engraving and supplemented by accurate register respectively adjacent laser induced coloured engravings. This structure, consisting of a adjacent to each other arcuate regions that are performed by the rotation of the diffraction engraving 5b and induced color laser engraving 10x, is in the form of a closed circle around the image a portrait. In marginal areas of laser-induced color images formed additional wave diffraction engraving 5b, which plots covers the laser-induced image u.

The structure of layers in the example implementation Fig similar to that used in the example implementation Fig. Under sensitive to laser the mu radiation layer 4, which is induced by the laser image u and induced by laser engraving 10x, are elements 5b diffraction patterns. They are preferably in the layer in a remaining area of the reflection layer 5r, but can be formed solely and directly sensitive to laser radiation layer 4A.

Laser processing for obtaining laser-induced saturated color image W and coloured engraving 10x is carried out appropriately, as in the earlier described embodiments.

1. A multilayer product, in particular multi-layer film, sensitive to laser radiation layer (4, 40) and a marking element such as a diffraction and/or hologram structure (5b, 5c, 50b), a reflective layer (5r, 50r), imprint (5d) or the like, which is formed in the second layer (5, 50) and/or sensitive to laser radiation layer (4, 40), characterized in that sensitive to laser radiation layer (4, 40) is performed by exposure to laser radiation markings (10, 10, 10U)trainer, hereinafter referred to as laser-induced marking (10, 10, 10U)trainer, which is positioned relatively accurate wiring marking element (5r, 5b, 5C, 5d).

2. The multilayer product according to claim 1, characterized in that the induced laser mark the bottom (10, 10x, 10U) trainer and a marking element (5r, 5b, 5c, 5d) is preferably optically distinguishable from the outside and are made so that mutually complement and relate to each other through the exact register.

3. The multilayer product according to claim 1, characterized in that the induced laser marking (10, 10, 10U) trainer and a marking element (5r, 5b, 5c, 5d) in the horizontal projection on the plane of the layers are placed with precise fitting to each other, preferably adjacent to each other, being in direct contact.

4. The multilayer product according to claim 1, characterized in that the induced laser marking (10, 10, 10U) trainer and a marking element (5r, 5b, 5c, 5d) is made fully or partially overlapping with the exact fitting.

5. The multilayer product according to claim 1, characterized in that the induced laser marking (10, 10x, 10U) trainer is located in the plane of the layers above or below the marking element (5r, 5b, 5c, 5d) and/or in the same plane layers, and a marking element.

6. The multilayer product according to claim 1, characterized in that the marking element is designed as a limited characteristic of the outer contour of the diffractive or holographic structure (5b, 5c), and/or as a limited characteristic of the outer contour of the reflecting field (5r), and/or as restricted characteristic of the outer contour of the imprint (5d).

7. The multilayer product according to claim 1, characterized in that datirovannaja laser marking (10, 10x, 10U) trainer and/or marking element (5b, 5c, 5d) made(s) in the form of a line.

8. The multilayer product according to claim 7, characterized in that the induced laser marking (10, 10x, 10U) trainer in the form of a line and a marking element (5b, 5c, 5d) in the form of a line in a horizontal projection on the plane of the layers is optically detected as accurately costacabana, preferably continuously passing the line.

9. The multilayer product according to claim 1, characterized in that the induced laser marking (10, 10x, 10U) trainer and/or marking element are aligned, respectively, are aligned relative to sham or real visible existing line alignment, preferably provided that induced by laser marking (10, 10x, 10U) trainer and/or marking element (5d) is a sequence of letters, numbers or the like.

10. The multilayer product according to claim 9, characterized in that induced by laser marking (10, 10x, 10U)trainer aligned relative to the alignment, and a marking element (5b, 5c, 5d), aligned to the line of alignment, aligned in the horizontal projection relative to the total line alignment, fictitious or real visible, which consists of parts of line alignment induced by laser marking and line alignment marking element.

11. Multilayer izdelie to claim 1, characterized in that induced by laser marking (10, 10x, 10U) trainer and/or marking element (5b, 5c, 5d) are made accordingly made as engraving.

12. The multilayer product according to claim 11, characterized in that the induced laser marking (10, 10x, 10U)trainer made as engraving, and marking element (5b, 5c, 5d), the engraving, in the horizontal projection plane of the optical layers are recognized as made precise fitting a single engraving.

13. The multilayer product according to claim 1, characterized in that the induced laser marking (10, 10x, 10U) trainer and/or marking element (5r, 5b) are performed, respectively, is made as an element of the surface, mainly as a sequence of interlaced fields the surface.

14. The multilayer product according to item 13, wherein the induced laser marking (10, 10x, 10U)trainer, made preferably as alternating field surface, and a marking element (5r, 5b), preferably made as alternating field surface, in a horizontal projection on the plane of the layers located one above the other, preferably the alternating fields of the surface of the laser-induced marking (10, 10x, 10U) trainer placed on one line or with a constant offset relative to the preferably alternating fields surface (5r, 5b) marcinowice what about the item.

15. The multilayer product according to item 13 or 14, characterized in that the induced laser marking (10, 10x, 10U)trainer, made preferably as alternating field surface, and a marking element (5r, 5b), preferably made as alternating field surface at observation interact for forming combinatorial image, preferably at different angles to form different images.

16. The multilayer product according to claim 1, characterized in that the induced laser marking (10, 10x, 10U) trainer designed as a colour marking.

17. The multilayer product according to claim 1, characterized in that sensitive to laser radiation sensitive material to laser radiation layer (4, 40) is made as a mixture of various sensitive to laser radiation components.

18. The multilayer product according to 17, characterized in that the mixture consists of at least three different dye components, preferably pigment components, and each of these components, preferably each component of the mixture, has the ability whitening under the action of laser under appropriate conditions of laser radiation that is specific to the component and/or a mixture composed of at least three different color-forming components, preferably color-forming dye is her moreover, each of the components, preferably each component of the mixture has the ability to change color under the influence of the laser under appropriate conditions of laser radiation, specific for the component, preferably has the ability to change color due to a change in state of the dye.

19. Multilayer product according p, characterized in that each of the three components is true that under the conditions of laser radiation, specific for a particular component, all other components of non-bleached or essentially non-bleached and therefore do not change color.

20. Multilayer product according p or 19, characterized in that sensitive to laser radiation material contains a cyan dye, preferably cyan pigment, and/or Magenta dye, preferably a Magenta pigment, and/or yellow dye, preferably yellow pigment.

21. The multilayer product according to claim 20, wherein the cyan dye is designed as a dye, bleach red laser beam, and/or purple dye made as a dye, bleach green laser beam, and/or yellow dye is made as a dye, bleach blue laser beam.

22. The way to improve the security against falsification layered products, preferably multilayer captivity and, which is sensitive to laser radiation layer and the marking element, which is located in the second layer and/or sensitive to laser radiation layer, wherein the laminated product is irradiated by laser in such a way that is sensitive to laser radiation the layer is induced by laser marking, positioned with high accuracy relative to the location of the marking element.

23. The method according to item 22, characterized in that during the laser processing of electronically controlling the position of the laser beam relative to the film depending on the location of the marking element, it is preferable that at or before the time of laser processing to determine electronically the actual location of the marking element, for example, in the image processing.

24. The method according to item 23, wherein the control means control the movement of the laser head.

25. The method according to item 22, wherein the laser treatment is carried out at least one layer of a multilayer product, preferably through diffractive and/or holographic structure located over sensitive to laser radiation layer, and/or preferably through the reflective layer.

26. The method according to the .22, characterized in that the laser-induced marking is realized by means of induced laser whitening and/or induced by the laser changes the color of the dye, which is sensitive to laser radiation layer.

27. The method according to item 22, wherein the laser-induced marking carried out preferably by removal in some areas sensitive to laser radiation layer.

Priorities for items:

04.11.2000 - claim 2, 3, 6-10, 13-21, 26, 27, and all signs claim 4, in addition to alternatives to "completely", and all signs claim 5, in addition to alternatives "under the protecting element;

13.08.2001 - claims 1, 11, 12, 22-25, and all signs claim 4, in addition to alternatives "partially", and all signs claim 5, in addition to alternatives over the marking element.



 

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32 cl, 16 dwg

FIELD: machine building.

SUBSTANCE: invention refers to method of laser labelling surface of metal or its alloy and can be implemented in machine building, jewellery industry and medicine. The method consists in preliminary plotting a calibration curve of dependence of depth of marking surface of a sample of specified metal or its alloy by means of effect of specific power of radiation incoming on surface. By means of a computer there is generated a protective digital code, where specific depth of marking and specific power of laser radiation correspond to each digit. A mark visible by a naked eye is applied on the marked surface of metal or its alloy by means of laser radiation transferred along marked surface; this mark corresponds to alpha-numeric or graphical information. A protective digital code in form of sequence of recesses invisible to a naked eye is applied on the produced surface visible to a naked eye; this code is marked by laser radiation of specific power chosen from the said calibrating curve.

EFFECT: high level of protection and simplified process.

8 cl, 5 dwg, 1 tbl, 1 ex

FIELD: physics, optics.

SUBSTANCE: device for transferring an image onto a wooden base has apparatus for receiving and/or creating an image. At least one source of a laser beam. Apparatus for moving the laser beam with rotation and/or translational movement of the laser beam relative the said wooden base or vice versa - for moving the wooden base relative the laser beam, as well as for focusing the laser beam onto the said base. At least one module for regulating radiation power of the laser beam. At least one module for controlling the said movement and focusing apparatus. Apparatus for converting information of the said image into an instruction for the said at least one regulation module and the said at least one control module. The said at least one regulation module regulates radiation power of the laser beam by directly changing pumping of the active substance and/or changing operation of the modulator located in the resonator of the source of the laser beam.

EFFECT: solution enables reproduction of images on a wooden base with an irregular shape with high accuracy and speed of processing, as well as high depth of transfer within the base.

22 cl, 2 dwg

FIELD: process engineering.

SUBSTANCE: proposed method may be used for making inscriptions and symbols on various materials, for examples, on light guides, light boards operated at high levels of illumination. Prior to applying coat of background material, contrast coat is applied that features minimum light reflection factor. Processed surface is divided along two coordinates into elementary sites to displace laser beam over said sites. All area of said sites is divided into area of sign outline and sign body area. On evaporating coats by laser radiation, the number of elementary sites is reduced to zero to form multistage sign profile comprising, at least, one step produced in contrast coat. Body sign area is kept unchanged.

EFFECT: higher readability and accuracy of signs, preservation of initial colours of materials.

3 cl, 3 dwg

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