Method for forming light flux and illumination device

FIELD: lighting technology.

SUBSTANCE: according to the method, an elongated light guide is used, which has in at least one axial section a base and two lateral sides tapering from the base to the top, furthermore, the base of each axial section is positioned on the end face of the light guide. The light flux is sent from at least one directional light source to the end face of the light guide, and the angle between the light flux going from the source and the light guide's elongation is taken from such a range where the light flux undergoes a total internal reflection from the tapering sides at least once in at least one axial section of the light guide, and the light flux must come out of one of the tapering sides after at least one total internal reflection.

EFFECT: transforming light fluxes into one or many light fluxes of greater cross section; more even brightness; high efficiency light input-output.

20 cl, 11 dwg

 

The technical field to which the invention relates.

The present invention relates to lighting technology, in particular to a method for forming a luminous flux and lighting device that allow you to get cost-effective, comfortable to perception, homogeneous light fluxes when using led light sources for lighting residential, technological and technical premises.

The level of technology

Currently, the known lighting devices that use led light sources in which to provide a more uniform light flux is applied diffusion scattering of light. See, for example, patents for utility model №95886 (publ. 10.07.2010) and # 93929 (publ. 10.05.2010), as well as the application for U.S. patent No. 2011/0042700 (publ. 24.02.2011).

The lack of such technical solutions is the presence of scattering particles in the material of the light guide element, which transmits light from the LEDs.

Also known for focusing the light flux with different lenses, as, for example, RF patent for useful model №95181 (publ. 10.06.2010). However, such a focus, although it does not use light-diffusing particles in the material of the light guide element is not able to provide uniform illumination due to inherent to any lens distortions (aberrations).

Disclosure of izaberete the Oia

Thus, the purpose of the present invention is to provide:

- convert light beams from sources in the one or more outgoing light beams of a larger cross-section;

- more uniform brightness of the outgoing beam in the cross section;

- high efficiency input-output light beam; and

a direction (direction) extending beams.

To achieve the above goals in the first object of the present invention, a method for forming a luminous flux, namely, that: is made of the light guide element is elongated, having at least one longitudinal section of the base and two sides, tapering from the base to the apex, with the base of each of the longitudinal sections is located at the end of the light guide element; serves light output from the at least one directional light source in the end face of the light guide element; choose the angle between the direction of light from a directional light source and the direction of elongation of the light guide element in such a range that the light the flow experienced at least one total internal reflection from the converging side walls in at least one longitudinal section of the light guide element and out through one of these tapering side zip pocket wit the parties after at least one total internal reflection.

The feature of the method according to the present invention is that the refractive index of the material of the light guide element, and the limits of the angles between the tapering sides in those of longitudinal sections, in which there is a distribution of the light flux, and the range of angles at which the light flux enters the light guide element can be chosen so that the luminous flux coming out through one of the tapered sides.

Another feature of the method according to the present invention is that the light guide element can perform curved so that at least one of the longitudinal sections, in which there is a distribution of the light flux in the light guide element is formed smoothly tapering shape with a bulge in the side of the light output from the light guide element.

When the light guide element can be performed in the form of a smoothly curved plate, obtained by the parallel transfer smoothly tapering shape in the direction perpendicular to the plane of this figure, and placed on the end face of the light guide element of the set of directional light sources. Either of the light guide element can be performed in the form of a body of rotation obtained by rotating smoothly tapering shape around an axis lying in the plane of this figure, and out of this figure near its pointed end, and once escaut on the end face of the light guide element of the set of directional light sources.

Another feature of the method according to the present invention is that the light guide element can perform curved so that at least one of the longitudinal sections, in which there is a distribution of the light flux in the light guide element is formed multilateral tapering shape, bounded by broken lines, with a bulge in the side of the light output from the light guide element.

When the light guide element can be curved with a fracture plate, obtained by the parallel transfer of multilateral tapering shape in the direction perpendicular to the plane of this figure, and placed on the end face of the light guide element of the set of directional light sources. Either of the light guide element can be performed in the form of a body of rotation obtained by rotating the multilateral tapering shape around an axis lying in the plane of this figure, and out of this figure near its pointed end, and is placed on the end face of the light guide element of the set of directional light sources.

Another feature of the method according to the present invention is that the directed light sources can be placed on the end face of the light guide element evenly.

Finally, another feature of the method according to the present invention is that as the at least one n is the identification of a light source can use the led.

To achieve the same goal in the second object of the present invention proposed a lighting device containing the light guide element made of elongated form and having at least one longitudinal section of the base and two sides, tapering from the base to the apex, with the base of each of the longitudinal sections is located at the end of the light guide element, and a directional light source, located on the end face of the light guide element for guiding the light flux in the end, while the angle between the direction of light from a directional light source and the direction of elongation of the light guide element is selected in such a range that the luminous flux experienced at least one total internal reflection of said tapering side walls in at least one longitudinal section of the light guide element and out through one of these tapering sides after at least one total internal reflection.

Feature lighting device according to the present invention is that the refractive index of the material of the light guide element, and the limits of the angles between the tapering sides in those of longitudinal sections, in which there is a distribution of the light flux, and the range of angles at which light p is the current enters the light guide element, can be chosen so that the luminous flux coming out through one of the tapered sides.

Another feature of the lighting device according to the present invention is that the light guide element can be made curved so that at least one of the longitudinal sections, in which there is a distribution of the light flux in the light guide element is formed smoothly tapering shape with a bulge in the side of the light output from the light guide element.

When the light guide element can be designed in the form of a smoothly curved plate, obtained by the parallel transfer smoothly tapering shape in the direction perpendicular to the plane of this figure, and on the end face of the light guide element can be placed multiple directional light sources. Either of the light guide element can be designed in the form of a body of rotation obtained by rotating smoothly tapering shape around an axis lying in the plane of this figure, and out of this figure near its pointed end, and the end face of the light guide element can be placed multiple directional light sources.

Another feature of the lighting device according to the present invention is that the light guide element can be made curved so that at least one of the longitudinal sections, in which p is oshodi distribution of the light flux in the light guide element, formed a multilateral tapering shape, bounded by broken lines, with a bulge in the side of the light output from the light guide element.

When the light guide element may be in the form of a curved, with fracture plate, obtained by the parallel transfer of multilateral tapering shape in the direction perpendicular to the plane of this figure, and on the end face of the light guide element can be placed many directional light sources. Either of the light guide element can be designed in the form of a body of rotation obtained by rotating the multilateral tapering shape around an axis lying in the plane of this figure, and out of this figure near its pointed end, and the end face of the light guide element can be placed multiple directional light sources.

Another feature of the lighting device according to the present invention is that the directed light sources can be placed on the end face of the light guide element evenly.

Finally, another feature of the lighting device according to the present invention is that as the at least one directional light source can be used led.

Brief description of drawings

The invention is illustrated in the accompanying drawings.

Figure 1 is a view in pop the river cross-section of the light guide element in accordance with one embodiment of the present invention.

Figure 2 shows the distribution of rays in the ellipse with the ratio of the lengths of axes a/b=2.

Figure 3 illustrates the initial distribution of the luminous flux from a point source.

Figure 4 shows the fraction η of the radiation coming out of the ellipse depending on the angle φ of inclination of the light beam with respect to an axis connecting the foci of the ellipse; specified points 1-4, corresponding to the angles at which comes out 15% of the total power of the source.

Figure 5 shows plots of A1B1and A2B2the surface of the elliptical lenses of glass, through which comes out 0,15 power source in focus 1.

6 is a diagram of the construction site of A2B2the lower (inner) surface of the light guide element with the total internal reflection; tricks 1 large and small ellipses coincide.

Fig.7 shows the angles of incidence of rays of the beam on the surface of A2B2on Fig.6.

Fig illustrates the angular distribution of the light beam in the light guide element 6.

Fig.9 gives the conditional view of the light guide element with a fixed capacity (15% of the total)that go with each reflection of the light beam from the upper (working) surface, if not the output radiation through the bottom surface (angular correlation saved exactly) according to the present invention.

Figure 10 shows the AET source (0) and the angular distribution function after each 1-11 reflection in the light guide element in figure 9.

11 shows a light guide element according to a possible variant of implementation of the present invention.

Detailed description of embodiments of the invention

Lighting device according to the present invention includes the light guide element and at least one directional light source. First, consider the light guide element tapering from the base of the lateral sides (11) in cross-section, which is conventionally shown in figure 1. This may be wedge-shaped or cone-shaped light guide element, that is made elongated and having at least one longitudinal section of the base and two sides, tapering from the base to the apex, with the base of each of these longitudinal sections is located at the end of the light guide element.

In the light guide element with a cross-section of figure 1, the beam from the light source (12)located on the end face of the light guide element for guiding the light flux in the butt and having the angle θ relative to the longitudinal axis of the light guide element, undergoes a first reflection angle φ1=π/2-θ-α/2, from the left of the working surface of the fiber and passes on. After the second reflection (reflection from the right of the working surface) φ2=π/2-θ-3α/2, after the k-th reflection angle is equal to φk=π/2-θ-α(k-1/2), i.e. the kdecreases with each reflection. Thus, when a reflection k*(θ) (1 k*(θ)=2) prove thatwhere φ*- the angle of total internal reflection for the material of the optical fiber with a refractive index n. When the reflection k*and the next light will begin to emerge from the light guide to the outside. Thus, at the initial stage of propagation of light, when k<k*(θ) is the translation along the direction of elongation of the fiber without going outside, and then if k≥k*(θ) and transfer and output radiation to the outside. Rays source with a large angle θ relative to the longitudinal axis of the fiber will be released closer to the input end of the fiber, and the rays with a smaller θ - more from this end.

That is, the angle between the direction of light from a directional light source and the direction of elongation of the light guide element is selected in such a range that the luminous flux experienced at least one total internal reflection of said tapering side walls in said at least one longitudinal section of the light guide element and out through one of these tapering sides after at least one of the mentioned total internal reflections. Thus, ensure the uniformity of the output radiation from the side surfaces of the light guide.

If the W refractive index of the material of the light guide element, as well as the limits of the angles between the tapering sides (11) in the longitudinal sections, where the distribution of the light flux, and the range of angles at which the light flux enters the light guide element, to choose so that the luminous flux coming out through one of the tapered sides of (11)will light guide element with radiation from one side only. Specified selection of the refractive index and corresponding angles is a fairly complex task, which in each case is solved using mathematical modeling.

Shown in figure 1 of the light guide element can be curved so that at least one of the longitudinal sections, where the distribution of the light flux in the light guide element is formed smoothly tapering shape with a bulge in the side of the light output from the light guide element.

Now consider the case when the curved lines in longitudinal section of such a light guide element represent segments of ellipses. For simplicity, we will first refer to Figure 2, where point source (12) of light, giving the luminous flux at an angle of 2θ0placed in one of the foci of the ellipse. The ellipse is made from a material with a refractive index of n1outside is a material with a refractive index of n2<n1 . The direction of the beam source (12) relative to the surface of the ellipse is determined by the angle φ of inclination of the right edge of the beam relative to the horizontal axis, connecting the foci of the ellipse.

Some beam from the beam has an angle φ+θ relative to the horizontal axis. Corresponding to this beam, the reflected beam has an angle φ'+θ', where φ' is the angle of inclination relative to the horizontal axis at the beam to the left of the reflected beam, and θ' is calculated from the beam. Since the angles ϕ are the same, the angle of incidence of the selected beam.

To determine the relationship between the angles θ and θ', we use the equation of an ellipse in polar coordinates [1]

.

As can be seen from Figure 2, for each ray in the beam source is the ratio ρcos(φ+θ)+ρ'cos(φ'+θ')=2ae. Then, substituting this value of the expression (1), we find the

,

where, as follows from Figure 2,

cos(φ')=F(φ+2θ0).

The expression (2) establishes a relation between θ and θ'.

For definiteness, assume that the light guide element (and the ellipse in figure 2) is made of glass n1≡n=1.55, around which is located the air with n2=1. Source (12) creates a luminous flux at an angle of 2θ0=30°, with a Gaussian angular distribution of radiated power

dispersion Δθ=θ0/3=5°,(see figure 3).

The relative fraction of the power of the radiation source (12), published in environment 2, is determined by the formula:

where the angle of incidence α=α(θ, φ) is determined by (0) taking into account expression (2). Reflectance (intensity) unpolarized radiation

R(θ)=1, θ>θ*θ*- the angle of total internal reflection,,

well - known Fresnel reflection coefficients for the amplitude of the field

.

Figure 4 shows the share of η(φ) radiation coming out from an ellipse with aspect ratio a/b=2.

Areas with η(φ)=0 corresponds to total internal reflection. Specified angles φ1=73.2° and φ2=357.6° (corresponding to points 1 and 2 on the graph), which comes out η=0.15 power source. Points 4 and 3 correspond to the angles 2π-(φ1+2θ0)=256.8° and a 4π(φ2+2θ0)=332.4° for beam, symmetrical beams & Phi;1,2on the horizontal axis. The surface of the ellipsoid, through which 0,15 power source indicated on Figure 5.

It should be noted that a relatively small change of the angles leads to a noticeable change of energy coming out of Elah the dog. For example, if φ1reduce to φ1=71.8°, i.e. by 1.4°, that is η=0.1, and if φ1be increased to φ1=74.2°, 1°, η=0.2. This is because the reflection coefficient (5) essentially depends on the angle of incidence θ only for angles close to θ*. Thus, with a strict requirement on a given power (with an error of less than 5%) of the output radiation surface shape of the light guide elements (as well as the position of the light source and the angular distribution of its capacity) must be maintained and known quite accurately.

The light guide element 6 includes a source 1 and plot A1B1the working surface with the shown orientation relative to each other. After reflection from the site of A1B1part-way out, the beam focus and will be distributed towards the focus 2 of the ellipse. To re-DeviceService beam and to direct it along the light guide element, a portion of its surface that will produce a second reflected beam must be defocusing (i.e. concave relative to the direction of propagation of the beam) elliptical lens. When the angles of incidence of rays of the beam on the surface of this lens must be greater than the angle of total internal reflection, then the radiation will not get out of the light guide element. It is obvious that the second paragraph is the surface in the form of an ellipse with the same eccentricity e, as for the first surface is not suitable, because the angles of incidence of rays on it will be the same as the first, i.e. less than the angle of total internal reflection, and part of the radiation will exit the light guide element to the outside (i.e. the inside of the ellipse). Thus, you must either change (increase) the aspect ratio of the ellipse corresponding to the second surface, or rotate the ellipse about its focus so that when the rays fall on the surface they all felt total internal reflection. Obviously, if the second surface to take part of an ellipse with a length greater semiaxis 3.3 and the aspect ratio of 2.2, as Fig.6 (aspect ratio for larger ellipse figure 6 is 2, and the length of its greater axis - 4), each beam of the beam will experience on this surface total internal reflection, and the light will not come out. Indeed, let us define, as can be seen from Fig.6, the angles φ1' and φ1" according to (2)and

The angle of incidence of the beam on the site of A2B2the surface is the same, for a beam incident on the area outside or inside of a smaller ellipse figure 6 is determined by the expression similar to (0),where φ varies from & Phi;1' to φ1". The dependence of α2(φ), φ1'<φ< & Phi;1" are shown in Fig.7. Ka is seen from Fig.7, α2(φ)>θ*, i.e. the radiation is not out of the light guide member through the plot of A2B2. Moreover, we note that the minimum aspect ratio at which α2(φ)>θ*as well 2,16. For the inner ellipse of figure 6, you can take the aspect ratio a/b>2.16, you can also change the size of the ellipse, keeping the aspect ratio, which will help to optimize the mutual arrangement of surface patches.

For the third reflected beam from the borders of the light guide element, i.e. from the site of A3B3at 6, went out would be given part of the full power of the radiation source (for example, the same 15%as and when the reflection from the site of A1B1) the shape of the surface area of A3B3must be different from the shape of the large surface area of the ellipse. But even if, by coincidence, will be that of area A3B3larger ellipse is about 15% of the total power of the source, then after the third reflection, in this case, the course of the rays will be difficult to describe, because the beam reflected from A3B3comes from point 2 to 6, which is not a big focus of the ellipse. Thus, the shape of the surface area of A3B3should be changed so that it corresponded to a certain ellipse with focus at point 2 (the focus of the small ellipse figure 6). The geometry of the definition parameters of this third ellipse must ensure that the output out of a given proportion (15%) power light.

It should also be noted that the angular distribution of the power source when moving from him to the site of A3B3is changed, as by entering the part of the radiation through the site of A1B1out, and due to focusing and defocusing of the beam upon reflection from the surfaces of the light guide element.

Find the distribution function after the first reflection. Before focusing

where α(θ, φ1) is determined by (0) taking into account expression (2). After focusing power in a small interval of angles

where θ and θ' are related by the expression (2). From equation (7) yields the distribution function after the first reflection

Dene θ(θ'). Because the expression (2) symmetrically with respect to φ'+θ' and φ+θ, i.e. cos(φ+θ)=F(φ'+θ'), then

θ' varies from 0 to φ1"- Φ1'and φ1", & Phi;1' are determined from the expressions (5A). On Fig shows the angular distribution function: primary source - curve 1, after the first reflection to focus curve 2, after the first reflection and focusing of the curve 3, for comparison, curve 4, corresponding to the focus at 100% reflection.

Likewise is determined by the angular distribution function f2(θ') after the second (full interior) accounted for the con - she presented on Fig curve 5,

In the calculations it is necessary to take the small eccentricity of the ellipse at 6. The angle θ' is changing from 0 to 2θ22"- Φ2'=29.1°, where φ2"=arcos[F(φ1')], φ2'=arcos[F(φ1")], θ(θ')=arccos[F(φ2"+θ')]-φ1'. As can be seen from Fig.6, after the second reflection there was a slight focusing of the beam in comparison with the original beam. You can make sure that selected elements of the boundary of the light guide element beam after the second reflection contains 85% of the energy of the primary beam:

To determine the next part of the surface of the light guide element, it is necessary to solve an equation analogous to (4)

where

and φ22'+θ, φ3=arccos[F(φ2)]. As a variable in the expression (2) for F will choose the eccentricity e, and the size of the larger axis of the third ellipse can be chosen so as to geometrically matching the third portion of the surface of the light guide member with the first. Thus, it is required to solve equation (11) η(e)=0.15 relative to e, which is included in the expression for φ3. Solving the last equation gives e=e3=0.723, which determines the aspect ratio of. For the third part of the surface with Lovozero item, you can choose the ellipse with a length greater semiaxis a=3.911, smaller semi-axis b=2.7, and left the focus of the third ellipse coincides with the left focus of the second.

Similarly can be completed (in different ways) the following elements of the surface of the light guide element. Figure 9 shows, for example, the light guide element, the surface of which is obtained by determining the respective eccentricities of the ellipses and (or) by tilting the axes of the ellipse relative to horizontal. Such a light guide element is designed so that its cross section is formed multilateral tapering shape, bounded by broken lines, with a bulge in the side of the light output from the light guide element. The radiation source is placed on the end face (the widest part of the cross-section) mentioned light guide element.

Figure 9 of the light guide element is made of seven side faces which form a convex ellipsoidal surface for the radiation of said radiation source, and seven side faces which form a concave ellipsoidal surface to reflect radiation from the radiation source, respectively. Through the surface areas marked on the convex side of the light guide element, leaves 15% of the total power of radiation and reflection of light from areas marked on the concave part Svetova the th element, there is no release of radiation to the outside.

Figure 10 presents the source and the angular distribution of the radiation after each reflection.

All of the above consideration was made for the case of flat cross-section. Real light guide element can be manufactured in different ways. For example, the light guide element having in cross section tapering shape of figure 1, 6 or 9, may be made in the form of a plate, obtained by the parallel transfer of this tapered shape in the direction perpendicular to the plane of this figure. At the end of this light guide element placed many of directional light sources such as LEDs.

Another example of the light guide element is shown figure 11. Such a light guide element is designed in the form of a body of rotation obtained by rotating tapering shape of figure 1, 6 or 9 around an axis lying in the plane of this figure, and out of this figure near its pointed end. At the end of the light guide element also place multiple directional light sources such as LEDs.

You can also run the light guide element in such a manner that at least one of the longitudinal sections, in which there is a distribution of the light flux in the light guide element is formed multilateral tapering the shape of a broken line and, having a bulge in the side of the light output from the light guide element. Moreover, the light guide element can be designed as curved with fracture plate, obtained by the parallel transfer of the mentioned multilateral tapering shape in the direction perpendicular to the plane of this figure, and in the form of a body of rotation obtained by rotating mentioned multilateral tapering shape around an axis lying in the plane of this figure, and out of this figure near its pointed end.

The arrangement of LEDs or other directional light sources at the end of any of the light guide element according to the present invention, it is expedient to produce evenly, if you want to get a full luminous flux with a uniformly distributed density. Then the generated luminous flux in the case of performing the light guide element in the form of a bent plate will be directed to one side, and in the case of performing the light guide element in the form of a body of rotation in all directions.

It is clear that, in another implementation of the light guide element, for example in the form of a convex body, such as that shown at 11, but not spherical, and ellipsoidal in cross-section, perpendicular to the vertical axis, - luminous flux may have a different density in different directions.

The present invention can be used in the dem is estrazioni signs, the pointers of different information, light commercials, lighting devices for medical applications and other light devices.

Thus, the present invention provides for the achievement of this goal by converting light beams from sources in the one or more outgoing light beams of larger cross section, which gives more uniform brightness of the outgoing beam in the cross section with high efficiency input-output light emission in a given direction extending beams.

1. Method of forming light flux, namely, that
made of the light guide element is elongated, having at least one longitudinal section of the base and two sides, tapering from the base to the apex, with the base of each of these longitudinal sections is located at the end of the light guide element;
serves light output from the at least one directional light source in the above-mentioned end face of the light guide element;
while choosing the angle between the direction of light from a directional light source and the direction of elongation of the light guide element in such a range that the luminous flux experienced at least one total internal reflection of said tapering sides in the above-mentioned, at the ore, one longitudinal section of the light guide element and out through one of these tapering sides after at least one of the mentioned total internal reflection.

2. The method according to claim 1, in which you choose the refractive index of the material of the light guide element, and the limits of the angles between the said tapered lateral sides in those of the above-mentioned longitudinal sections, in which there is a distribution of the light flux, and the above-mentioned range of angles at which the light flux enters the light guide element, so that the luminous flux coming out through one of the tapered sides.

3. The method according to claim 2, in which the light guide element performs a curved so that at least one of these longitudinal sections, in which there is a distribution of the light flux in the light guide element is formed smoothly tapering shape with a bulge in the side of the light output from the light guide element.

4. The method according to claim 3, in which the light guide element are in the form smoothly curved plate, obtained by the parallel transfer referred to smoothly tapering shape in the direction perpendicular to the plane of this figure, and placed on the end face of the light guide element of the set of directional light sources.

5. The method according to claim 3, in which the light guide element is performed in the ideal body of rotation, obtained by rotating mentioned gradually tapering shape around an axis lying in the plane of this figure, and out of this figure near its pointed end, and is placed on the end face of the light guide element of the set of directional light sources.

6. The method according to claim 2, in which the light guide element performs a curved so that at least one of these longitudinal sections, in which there is a distribution of the light flux in the light guide element is formed multilateral tapering shape, bounded by broken lines, with a bulge in the side of the light output from the light guide element.

7. The method according to claim 6, in which the light guide element are in the form with curved bends in the plate, obtained by the parallel transfer of the mentioned multilateral tapering shape in the direction perpendicular to the plane of this figure, and placed on the end face of the light guide element of the set of directional light sources.

8. The method according to claim 6, in which the light guide element are in the form of a body of rotation obtained by rotating mentioned multilateral tapering shape around an axis lying in the plane of this figure, and out of this figure near its pointed end, and is placed on the end face of the light guide element of the set of directional light sources.

9. The method according to any of the preceding paragraphs, in which the EO directed light sources are placed on the end face of the light guide element evenly.

10. The method according to claim 9, in which the at least one directional light source using the led.

11. Lighting device containing the light guide element made of elongated form and having at least one longitudinal section of the base and two sides, tapering from the base to the apex, with the base of each of these longitudinal sections is located at the end of the light guide element, and a directional light source, located on the end face of the light guide element for guiding the light flux in the end, while the angle between the direction of light from a directional light source and the direction of elongation of the light guide element is selected in such a range that the luminous flux experienced at least one total internal reflection from mentioned tapering sides in the above-mentioned at least one longitudinal section of the light guide element and out through one of these tapering sides after at least one of the mentioned total internal reflection.

12. The device according to claim 11, in which the refractive index of the material of the light guide element, and the limits of the angles between the said tapered lateral sides in those of the above-mentioned longitudinal sections, in which the distribution of lights is on thread and the above-mentioned range of angles at which the light flux enters the light guide element is selected so that the luminous flux coming out through one of the tapered sides.

13. The device indicated in paragraph 12, in which the light guide element is made curved so that at least one of these longitudinal sections, in which there is a distribution of the light flux in the light guide element is formed smoothly tapering shape with a bulge in the side of the light output from the light guide element.

14. The device according to item 13, in which the light guide element is designed in the form of a smoothly curved plate, obtained by the parallel transfer referred to smoothly tapering shape in the direction perpendicular to the plane of this figure, and on the end face of the light guide element placed many directional light sources.

15. The device according to item 13, in which the light guide element is designed in the form of a body of rotation obtained by rotating mentioned gradually tapering shape around an axis lying in the plane of this figure, and out of this figure near its pointed end, and the end face of the light guide element placed many directional light sources.

16. The device indicated in paragraph 12, in which the light guide element is made curved so that at least one of these longitudinal sections, in which the distribution is gotovogo flux in the light guide element, formed a multilateral tapering shape, bounded by broken lines, with a bulge in the side of the light output from the light guide element.

17. The device according to clause 16, in which the light guide element is designed as a curved, with fracture plate, obtained by the parallel transfer of the mentioned multilateral tapering shape in the direction perpendicular to the plane of this figure, and on the end face of the light guide element placed many directional light sources.

18. The device according to clause 16, in which the light guide element is designed in the form of a body of rotation obtained by rotating mentioned multilateral tapering shape around an axis lying in the plane of this figure, and out of this figure near its pointed end, and the end face of the light guide element placed many directional light sources.

19. Device according to any one of § § 11-18, in which the directed light sources placed on the end face of the light guide element evenly.

20. The device according to claim 19, in which the at least one directional light source used led.



 

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13 cl, 21 dwg

FIELD: physics.

SUBSTANCE: optical device has at least a first separate part (10) in form of a solid waveguide and an additional separate part (10") for connecting with the light-emitting diode (LED) light source. The first separate optical part (10) narrows in the direction z in a Cartesian coordinate system from the x-y plane, has longitudinal length in the direction y which is less than or equal to its longitudinal length in the directions z and x, and has first and second flat outer surfaces (14), lying oppositely in the x-z plane, third and fourth outer surfaces (16, 20) essentially lying opposite in the x-y plane, and fifth and sixth oppositely lying outer surfaces (7), arched and rounded relative the y-z plane. The third outer surface (16) has a rectangular shape. The fifth and sixth outer surfaces (7) are arched such that the fourth outer surface has size in the direction x less than the size of the third outer surface. The third (16), fifth and sixth (7) outer surfaces are primary surfaces for light output, and the light source (6) is entirely placed in the optical device opposite the light output surface (3, 23).

EFFECT: emission of focused light, having a given intensity distribution curve.

9 cl, 4 dwg

Dental illuminator // 2403494

FIELD: physics.

SUBSTANCE: illuminator has a housing in which there is a base in whose socket of which parabolic-shaped reflectors are screwed in. Powerful light-emitting diodes are fitted at the focus of the reflectors. The housing is closed by a transparent cover made from polycarbonate. There are light filters between the base and the cover. The light-emitting diodes are placed on the base symmetrically about the axis of the illuminator. Light-emitting diodes placed nearby have different spatial orientation based on the condition for obtaining a uniformly illuminated elliptical light spot, and the light-emitting diodes lying opposite each other have a reflection symmetric spatial orientation. There is a switch on the housing. The housing of the illuminator is joined to a suspension on which a unit for controlling brightness of the illuminator is mounted.

EFFECT: provision for a light spot which meets ISO 9680 requirements with simplification of the design and miniaturisation.

2 cl, 4 dwg

Illumination device // 2398996

FIELD: physics.

SUBSTANCE: illumination device has at least one light source and at least one diffuser. The diffuser consists of at least one scattering polymer element in whose transparent polymer mass there are transparent scattering bodies. The diffuser covers at least one or more light sources and is made in form an external housing component of the illumination device. The scattering bodies have a narrow Gaussian multimodal distribution.

EFFECT: simple design, fewer light sources required, more uniform illumination.

14 cl, 5 dwg

Searchlight // 2302585

FIELD: lighting engineering.

SUBSTANCE: searchlight comprises Fresnel lens, reflector, lamp, and at least one additional Fresnel lens. The additional Fresnel lens is made of a lens with negative focus distance and, hence, is a dispersing lens having virtual focus point. The distance (a) between the Fresnel lens and reflector can be changed in correlation with the distance (b) between the lamp and reflector on the basis of the aperture angle determined for the light beam. The virtual focusing point of the dispersing lens is positioned out of the unit of the Fresnel lens, and it can be in coincidence with the focusing point of the reflector that is located far from the reflector. The Fresnel lens is made of a double-concave dispersing lens and has double lens with chromatically corrected characteristics of imaginary. The searchlight has Fresnel lens with integrated diffusion round window that is positioned at the Fresnel lens center and defines the system for mixing light which changes the ratio of the scattered light to the reflected light. The distance (b) can be controlled by moving the lamp with respect to the top of the reflector. The reflector is made of metallic or transparent dielectric material, preferably glass or/and plastic, and represents an ellipsoidal reflector. The Fresnel lens is coated with the dielectric interference layers that change the light spectrum passing through them. The auxiliary reflector is interposed between the Fresnel lens and reflector.

EFFECT: reduced sizes and efficiency.

20 cl, 8 dwg

FIELD: optics.

SUBSTANCE: proposed Fresnel-lens searchlight whose light beam is radiated at adjustable aperture angle has reflector, lamp, and at least one Fresnel lens. The latter is essentially negative focal length lens and, hence, it is negative lens with virtual focal point. Searchlight is designed for superposing focal point distant from reflector onto virtual focal point of Fresnel lens. Mentioned point of reflector is superposed on virtual focal point of Fresnel lens in searchlight position forming quasi-parallel path of beam. It is concave-concave negative lens incorporating duplex lens with chromatically corrected display characteristics. Searchlight Fresnel lens has circular integrated dissipating glass disposed at center of Fresnel lens thereby forming light mixing system that varies some fraction of dissipated light relative to fraction of diametrically and optically reflected light, that is, light mixing is function of Fresnel-lens searchlight position. Searchlight ellipsoidal reflector is made of metal or transparent, preferably dielectric, material in the form of glass and/or plastic. Fresnel lens is covered with a number of dielectric interference layers which function to vary spectrum of light passed through lens. Auxiliary reflector is disposed between Fresnel lens and main reflector.

EFFECT: reduced space requirement and mass compared with prior-art searchlights of this type.

19 cl, 6 dwg

FIELD: optics.

SUBSTANCE: micro-lens array includes micro-lens array of Fresnel lenses, provided with grooves, divided on reflecting and deflecting parts. Reflecting surface is engineering so that angle of light fall onto it exceeds angle of full inner reflection, and limit angle is computed from formula , and functional dependence between input and output beams and micro-lens parameters is described by formula , where α - input angle; β - output angle; γ - angle of inclination of reflecting surface; δ - maximal falling angle of light; ε - angle of inclination of deflecting surface; n1 - air deflection coefficient; n2 - lens material deflection coefficient. Output beam is formed in such a way, that central groove forms wide-angle zone, and next grooves from center to edge form a zone from edge to center.

EFFECT: increased beam divergence angle after micro-structured optics up to 170-180° (depending on source used) with efficiency of 80-90% and with fully controlled shape of output beam.

14 dwg

Illuminating device // 2295667

FIELD: illumination.

SUBSTANCE: device comprises light source and light scattering screen made of a colored plastic. The light source is composed of one or several light-emitting diodes. The screen transmits at least 35% and reflects 15% when the wavelength of radiation emitted by the diode reaches a maximum.

EFFECT: reduced sizes and power consumption.

17 cl, 2 dwg

FIELD: the invention refers to searchlights.

SUBSTANCE: the searchlight with Frenel's lens with a regulated angle of aperture of coming out beam of light has preferably an elliptical reflector, a lamp and at least one Frenel's lens. The Frenel's lens has a diffuser, at that the diffuser is fulfilled of round form and is located only in the center of the Frenel's lens or the diffuser is fulfilled with changing degree of dispersion in such a way, that more powerfully dispersed fields are located in the middle of the diffuser and fields dispersed in a less degree are located along its edge. The Frenel's lens with the diffuser form a system of light displacement which changes the share of dispersed light in relation to the share of geometrically and optically projected light and thus changes correlation of light displacement as a function of installing a searchlight with Frenel's lens and also has a real point of focusing of a reflector removed from the reflector. The Frenel's lens is a flat-convex lens with chromatic corrected properties of projection. The covering of the Frenel's lens has a system of dielectric interference layers that changes the spectrum of light passing through it. An auxiliary reflector is installed between the Frenel's lens and the reflector.

EFFECT: provides high degree of effectiveness of obtaining of even coming out of light.

17 cl, 5 dwg

FIELD: light engineering.

SUBSTANCE: searchlight comprises Fresnel lens with controlled aperture of output beam, elliptical reflector, lamp, and at least one Fresnel lens. The distance between the Fresnel lens and reflector can be changed depending on the distance between the lamp and reflector according to the controlled angle of the aperture of the searchlight beam. The Fresnel lens has circular diffusion screen mounted at the center of the lens. The Fresnel lens and the screen define a system for shifting light, which allows the fraction of the diffused light to be changed, and the Fresnel lens has real point of focusing that can be set in coincidence with the focusing point of the reflector. The reflector focusing point is located far from the reflector. The Fresnel lens represents a flat-convex collecting lens and has double lens with chromatic-corrected projection properties. The coating of the Fresnel lens has a system of dielectric interference layer that changes the spectrum of the light passing through it. The auxiliary reflector is interposed between the Fresnel lens and reflector.

EFFECT: enhanced efficiency.

19 cl, 6 dwg

FIELD: the invention refers to searchlights.

SUBSTANCE: the searchlight with Frenel's lens with a regulated angle of aperture of coming out beam of light has preferably an elliptical reflector, a lamp and at least one Frenel's lens. The Frenel's lens has a diffuser, at that the diffuser is fulfilled of round form and is located only in the center of the Frenel's lens or the diffuser is fulfilled with changing degree of dispersion in such a way, that more powerfully dispersed fields are located in the middle of the diffuser and fields dispersed in a less degree are located along its edge. The Frenel's lens with the diffuser form a system of light displacement which changes the share of dispersed light in relation to the share of geometrically and optically projected light and thus changes correlation of light displacement as a function of installing a searchlight with Frenel's lens and also has a real point of focusing of a reflector removed from the reflector. The Frenel's lens is a flat-convex lens with chromatic corrected properties of projection. The covering of the Frenel's lens has a system of dielectric interference layers that changes the spectrum of light passing through it. An auxiliary reflector is installed between the Frenel's lens and the reflector.

EFFECT: provides high degree of effectiveness of obtaining of even coming out of light.

17 cl, 5 dwg

Illuminating device // 2295667

FIELD: illumination.

SUBSTANCE: device comprises light source and light scattering screen made of a colored plastic. The light source is composed of one or several light-emitting diodes. The screen transmits at least 35% and reflects 15% when the wavelength of radiation emitted by the diode reaches a maximum.

EFFECT: reduced sizes and power consumption.

17 cl, 2 dwg

FIELD: optics.

SUBSTANCE: micro-lens array includes micro-lens array of Fresnel lenses, provided with grooves, divided on reflecting and deflecting parts. Reflecting surface is engineering so that angle of light fall onto it exceeds angle of full inner reflection, and limit angle is computed from formula , and functional dependence between input and output beams and micro-lens parameters is described by formula , where α - input angle; β - output angle; γ - angle of inclination of reflecting surface; δ - maximal falling angle of light; ε - angle of inclination of deflecting surface; n1 - air deflection coefficient; n2 - lens material deflection coefficient. Output beam is formed in such a way, that central groove forms wide-angle zone, and next grooves from center to edge form a zone from edge to center.

EFFECT: increased beam divergence angle after micro-structured optics up to 170-180° (depending on source used) with efficiency of 80-90% and with fully controlled shape of output beam.

14 dwg

FIELD: optics.

SUBSTANCE: proposed Fresnel-lens searchlight whose light beam is radiated at adjustable aperture angle has reflector, lamp, and at least one Fresnel lens. The latter is essentially negative focal length lens and, hence, it is negative lens with virtual focal point. Searchlight is designed for superposing focal point distant from reflector onto virtual focal point of Fresnel lens. Mentioned point of reflector is superposed on virtual focal point of Fresnel lens in searchlight position forming quasi-parallel path of beam. It is concave-concave negative lens incorporating duplex lens with chromatically corrected display characteristics. Searchlight Fresnel lens has circular integrated dissipating glass disposed at center of Fresnel lens thereby forming light mixing system that varies some fraction of dissipated light relative to fraction of diametrically and optically reflected light, that is, light mixing is function of Fresnel-lens searchlight position. Searchlight ellipsoidal reflector is made of metal or transparent, preferably dielectric, material in the form of glass and/or plastic. Fresnel lens is covered with a number of dielectric interference layers which function to vary spectrum of light passed through lens. Auxiliary reflector is disposed between Fresnel lens and main reflector.

EFFECT: reduced space requirement and mass compared with prior-art searchlights of this type.

19 cl, 6 dwg

Searchlight // 2302585

FIELD: lighting engineering.

SUBSTANCE: searchlight comprises Fresnel lens, reflector, lamp, and at least one additional Fresnel lens. The additional Fresnel lens is made of a lens with negative focus distance and, hence, is a dispersing lens having virtual focus point. The distance (a) between the Fresnel lens and reflector can be changed in correlation with the distance (b) between the lamp and reflector on the basis of the aperture angle determined for the light beam. The virtual focusing point of the dispersing lens is positioned out of the unit of the Fresnel lens, and it can be in coincidence with the focusing point of the reflector that is located far from the reflector. The Fresnel lens is made of a double-concave dispersing lens and has double lens with chromatically corrected characteristics of imaginary. The searchlight has Fresnel lens with integrated diffusion round window that is positioned at the Fresnel lens center and defines the system for mixing light which changes the ratio of the scattered light to the reflected light. The distance (b) can be controlled by moving the lamp with respect to the top of the reflector. The reflector is made of metallic or transparent dielectric material, preferably glass or/and plastic, and represents an ellipsoidal reflector. The Fresnel lens is coated with the dielectric interference layers that change the light spectrum passing through them. The auxiliary reflector is interposed between the Fresnel lens and reflector.

EFFECT: reduced sizes and efficiency.

20 cl, 8 dwg

Illumination device // 2398996

FIELD: physics.

SUBSTANCE: illumination device has at least one light source and at least one diffuser. The diffuser consists of at least one scattering polymer element in whose transparent polymer mass there are transparent scattering bodies. The diffuser covers at least one or more light sources and is made in form an external housing component of the illumination device. The scattering bodies have a narrow Gaussian multimodal distribution.

EFFECT: simple design, fewer light sources required, more uniform illumination.

14 cl, 5 dwg

Dental illuminator // 2403494

FIELD: physics.

SUBSTANCE: illuminator has a housing in which there is a base in whose socket of which parabolic-shaped reflectors are screwed in. Powerful light-emitting diodes are fitted at the focus of the reflectors. The housing is closed by a transparent cover made from polycarbonate. There are light filters between the base and the cover. The light-emitting diodes are placed on the base symmetrically about the axis of the illuminator. Light-emitting diodes placed nearby have different spatial orientation based on the condition for obtaining a uniformly illuminated elliptical light spot, and the light-emitting diodes lying opposite each other have a reflection symmetric spatial orientation. There is a switch on the housing. The housing of the illuminator is joined to a suspension on which a unit for controlling brightness of the illuminator is mounted.

EFFECT: provision for a light spot which meets ISO 9680 requirements with simplification of the design and miniaturisation.

2 cl, 4 dwg

FIELD: physics.

SUBSTANCE: optical device has at least a first separate part (10) in form of a solid waveguide and an additional separate part (10") for connecting with the light-emitting diode (LED) light source. The first separate optical part (10) narrows in the direction z in a Cartesian coordinate system from the x-y plane, has longitudinal length in the direction y which is less than or equal to its longitudinal length in the directions z and x, and has first and second flat outer surfaces (14), lying oppositely in the x-z plane, third and fourth outer surfaces (16, 20) essentially lying opposite in the x-y plane, and fifth and sixth oppositely lying outer surfaces (7), arched and rounded relative the y-z plane. The third outer surface (16) has a rectangular shape. The fifth and sixth outer surfaces (7) are arched such that the fourth outer surface has size in the direction x less than the size of the third outer surface. The third (16), fifth and sixth (7) outer surfaces are primary surfaces for light output, and the light source (6) is entirely placed in the optical device opposite the light output surface (3, 23).

EFFECT: emission of focused light, having a given intensity distribution curve.

9 cl, 4 dwg

FIELD: physics.

SUBSTANCE: light-emitting device (10) has a light-emitting element (1) and an element (2) for controlling light emitted by the light-emitting element (1). The light flux control element (2) has (i) a light-receiving surface (2a) on which light emitted by the light-emitting element (1) falls, and (ii) a light-emitting surface (2b).

EFFECT: high uniformity of light intensity, low reflection coefficient due to Fresnel reflection, improved scattering characteristics.

13 cl, 21 dwg

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