Multipoint ophthalmological laser probe

FIELD: medicine.

SUBSTANCE: group of inventions relates to medical equipment, namely, to laser probes and their combinations, applied in ophthalmology. Probe contains irradiating optic fibre for light beam irradiation, optic system, located on the irradiation side of irradiating optic fibre, and two or more receiving optic fibres, located opposite to irradiating optic fibre. Optic system contains diffractive surface. Light beam, irradiated by irradiating optic fibre, is diffracted into two or more diffracted light beams, focused in plane, parallel to diffraction surface. Receiving ends of each of two or more receiving optic fibres, are intended for reception of light beam, diffracted by optic system, are located in plane, parallel to diffraction surface. Another version of implementation is ophthalmologic laser probe, containing irradiating optic fibre and optic system, located on irradiation side of irradiating optic fibre. Optic system is made in the same way as in the previous version. Connection for laser probe contains case, optic system, located in case, first connecting link, located on one side of optic system; and second connecting link, located on the other side of optic system. Optic system contains diffraction surface, each of two or more diffracted light beams is focused in plane, parallel to said surface.

EFFECT: application of group of inventions will make it possible to reduce operation time due to probe construction which makes it possible to form multipoint laser beam.

27 cl, 16 dwg

 

The prior art inventions

The invention relates to a laser probe for use in ophthalmic procedures, and more particularly to multi-point laser probe for use in photocoagulation.

From the anatomical point of view of the eye is divided into two distinct parts - the front segment and the rear segment. The anterior segment includes the lens and extends from the outer layer of the cornea (corneal endothelium) to the back of the lens capsule. The rear segment includes a segment of the eye behind the lens capsule. The rear segment extends from the anterior hyaloid membrane of the retina, in direct contact, which is the posterior hyaloid membrane of the vitreous body. The rear segment size is considerably larger than the front segment.

The rear segment includes the vitreous body is a transparent colourless gel-like substance. It takes approximately two thirds of the eye, determining its shape and form even before birth. It is 1% of collagen and hyaluronate sodium and 99% of the water. The anterior border of the vitreous body is the anterior hyaloid membrane, which is in contact with the posterior capsule of the lens, while the posterior hyaloid membrane forms the rear boundary and is in contact with the net is Oh.

Macular degeneration is a disease seen mainly in the elderly, in which the Central part of the inner lining of the eye, known as the area of the macula, is undergoing thinning, atrophy, and in some cases bleeding. This can lead to loss of Central vision, which entails the inability to see small objects to read or recognize faces. According to the American Academy of ophthalmology this is the main cause of loss of Central vision, and today in the United States suffer from this disease are those whose age is more than fifty years.

When blood vessels under the retina bleed, it leads to a form of macular degeneration called wet macular degeneration. In some cases, the bleeding can be stopped or slowed down using a procedure known as photocoagulation. Photocoagulation is a technique used by surgeons is the retina for the treatment of some eye diseases, one of which - exudative (wet) form of macular degeneration. In the course of such treatment laser beams directed into the eye, focusing on having the pathology of blood vessels beneath the retina. The laser causes cauterization of blood vessels, seal them and prevent further leakage"that gives hope to prevent the IC further vision loss.

Using standard laser probe with a single point of the emitted beam, the surgeon-ophthalmologist usually disables and enables the laser beam is interleaved in "quick" mode, using the foot pedal, as he scans the beam surface of the retina for education on the retina one-dimensional or two-dimensional array of spots cautery formed by laser photocoagulation. Using adenopathy laser probe, covering the desired area of the retina points, which held photocoagulation, can take a long time.

Multi-point laser probe can potentially reduce the time required for the formation of the desired set of points cauterization by the laser. However, if you use the laser with reduced radiation power, which is already operating at its maximum capacity, multi-point laser probe may not lead to the reduction of time required for the formation of the desired set of points cauterization by the laser. This is due to the fact that the fixed power P of the laser is split between the N points of penetration of the beam and, thus, the energy at a given point average only P/N. Therefore, to ensure equal cautery exposure time required should be approximately N times greater than the exposure time when using dopuskovogo laser probe. Therefore, not the motrya that you should perform is only 1/N of the desired number of laser burns, performed odnopozova probe, the exposure time, which accounts for one searing beam is N times greater than when using dopuskovogo probe. Thus, the total time of forming the pixel array cautery remains the same.

However, currently available new laser for photocoagulation, such as lasers next generation" (NGL) Alcon Laboratories, Inc., the desired beam intensity which is necessary to ensure the ideal point of coagulation, is a small fraction f of the maximum possible intensity of the beam. If the value of f is equal to 1/N, then you can use multipoint laser beam with N the number of emitted beams at a maximum power level of the laser beam, and then the time for the formation of the desired set of points undergoing coagulation, is only 1/N of the time that would be required when using single-point laser probe. This reduces the total time for each operation and allows you to perform more operations in one day, which reduces the overall cost of operation. Thus, it is desirable to have multi-point laser probe to perform photocoagulation.

The invention

In one embodiment consistent with the principles of the present invention, the present invention is a laser probe, sod is Rashi radiating optical fiber, optical system and two or more receiving optical fibers. Radiating optical fiber emits a beam of laser light. The optical system provides diffraction of a light beam emitted from emitting optical fiber. Each of the receiving optical fiber receives the light beam, dragirovaniya optical system.

In another embodiment consistent with the principles of the present invention, the present invention is a connection for the laser probe, which includes a housing, an optical system located in the housing, and two connecting links, one on each side of the optical system. The optical system is diffraction beam of the incident light.

In another embodiment consistent with the principles of the present invention, the present invention is an ophthalmic laser probe containing radiating optical fiber and the optical system. The optical system is diffraction of a light beam emitted from emitting optical fiber into two or more diffracted beams of light.

It should be understood that both the foregoing General description and the subsequent detailed description are merely exemplary and explanatory and are intended to provide additionally the explanation of the invention in the claims. In the subsequent description as well as in the practical aspect of the invention, described and proposed additional advantages and objectives of the invention.

Brief description of drawings

The accompanying drawings, which are included in the present description and are part of it, illustrate several embodiments of the invention and together with the description used to explain the principles of the invention.

Figure 1 shows a view in cross section of a simple system of forming images with the transition from fiber to fiber in accordance with the principles of the present invention.

Figure 2 shows a view in cross section of the image with the transition from fiber to fiber, which uses a lens with a diffraction grating according to the principles of the present invention.

Figure 3 shows a view in cross section of the distal end of the laser probe, which includes the handle and attached cannula according to the principles of the present invention.

4 shows diffraction grating, which creates an array of 22 spots according to the principles of the present invention.

Figure 5 shows a system of imaging that uses a diffraction grating according to the principles of the present invention.

On figa and 6B shows respectively a view in sectional side view and a front view of a hybrid multiplex node of the lattice n is the surface lattice/volume hologram.

7 shows a view in cross section side view of the layout of the beams formed hybrid multiplex node array based surface lattice/volume holograms presented on Fig.6.

On Fig shows a view in cross section of the connecting structure according to the principles of the present invention.

Figure 9 shows a partial view of the laser probe according to the principles of the present invention.

Figure 10 shows the connection between the laser probe presented on Fig.9, and the connecting structure provided on Fig.

Figure 11 and 12 show views of the face covering, and covered the connecting links, respectively, in accordance with the principles of the present invention.

On Fig shows a view in cross section of the laser probe.

On Fig shows a view in cross section of the laser probe with a diffraction grating according to the principles of the present invention.

On Fig shows the exploded view in cross section of the distal tip of the laser probe presented on Fig.

On Fig shows the exploded view in cross section of the distal tip of the laser probe, in which the diffraction grating is endowed with optical power.

A detailed description of the preferred embodiments

Will be made detailed reference to examples of embodiments of the invention, the examples show the and the accompanying drawings. Where possible, the drawings used a single reference position for the same or similar parts.

Figure 1 shows a view in cross section of a simple system of forming images with the transition from fiber to fiber in accordance with the principles of the present invention. In the embodiment represented in figure 1, the system has two fibers 110, 120 and two lenses 130, 140. Fiber 110 emits a divergent light beam, which comes from a laser source (not shown). Diverging beam collyriums lens 130. As you know, the collimated light is light, whose rays are parallel and form a planar wave front. This collimated beam is focused by lens 140 in the spot of a small diameter at the input end surface of the receiving fiber 120. In this case, each of the lenses 130, 140 is a PLANO-convex aspheric lens. In a PLANO-convex aspheric lens one surface is flat and the other surface is convex, with high-precision aspheric surface to focus the light in a spot of minimum diameter. This scheme gives the lowest aberration of the beam and may allow you to get almost perfect diffraction-limited laser spot on the receiving fiber 120.

In one embodiment of the present invention, each of the fibers 110, 120 is soboy-micron fiber, NA=0,15. The size of the lenses appropriately dimensioned for exact occurrences in the standard arm ophthalmic instrument with an internal diameter of 0.035 inch, such as manufactures and markets Alcon Laboratories, Inc.

Figure 2 shows a view in cross section of the image with the transition from fiber to fiber, which uses a lens with a diffraction grating. In figure 2, the system includes radiant fiber 110, the lens 130, the lens 140 with a diffraction grating 205, and three receiving fiber 220, 230, 240. In the embodiment represented in figure 2, the diffraction grating 205 is located on the flat side of the PLANO-convex lens 140. Such a diffraction grating capable of diffraction of the incident beam with many beams at the output, which focus on the individual spots, as shown in the drawing. In this case, the node 210 lens/grating performs the diffraction of the incident beam and focuses it in two different discrete spot beam. The thickness of the surface elements of the diffraction grating is designed so that approximately one third of the light dirrahiuma in each diffracted spot, and one third of the light remains in the spot of the zero order redirecionado beam. In this case, each of the three receiving fibers 220, 230, 240 carries approximately one third of the laser light from daysago beam.

In this arrangement produces multiple laser spots from a single incident laser beam. Diffraction grating 205 at node 210 lens/grating can be designed so as to form a multiple diffracted beam spots, which may be associated with many receiving fibers 220, 230, 240. In one example, the diffraction grating can be made with the possibility of diffraction of the incident beam so that almost 100% of the light directed in dragirovaniya beams (and the zero order beam would be excluded). In General, these gratings can be made with the possibility of the formation of the diffraction diagrams of the location of the beam on one straight line or in a two-dimensional region (as shown in figure 4). Diffraction grating 205 presented in figure 2, can physically direct contact with the lens 140 or may be separated from it. In this case, the diffraction grating can be performed using a polymer or a glass structure, which is separated from the lens. Diffraction grating 205, which is separated from the collecting lens 140 may be located behind the collecting lens 140, between the collecting lens 140 and the collimating lens 130, and the front collimating lens 130.

Figure 3 shows the distal end of the laser probe, which includes the handle and attached cannula according to which rincipal of the present invention. Figure 3 node 300 laser probe includes radiant fiber 110, a lens 130, a lens with a diffraction grating 210, three receiving fiber 220, 230, 240, the handle cannula 310 and 320. Each of the three receiving fibers 220, 230, 240 has a curved distal end. These curved ends of the guide dragirovaniya laser spots on different parts, thus forming the layout of the spots. When using the node 300 laser probe for photocoagulation of blood vessels of the retina curved ends of the receiving fibers 220, 230, 240 form the layout of the spots, which can be used for more rapid and effective coagulation of blood vessels. Each time you switch the laser on the retina can be projected many spots, covering a considerable portion of its surface.

4 shows diffraction grating, which creates an array of 22 spots according to the principles of the present invention. Figure 4 diffraction grating 410 form 4 spots in two-dimensional region. Each of the four spots coincides with the receiving fiber 420, 430, 440, 450. Using various design solutions for the diffraction grating 410, you can get any number of layouts spots.

Figure 5 shows a system of imaging that uses a diffraction grating according to the principles of this is part II of the invention. Figure 5 the system includes radiant fiber 510, two receiving fibers 520, 530, and a diffraction grating 540. Figure 5 refractive lenses were removed and replaced with a diffraction grating 540. In this case, the edge of the grid 540 is required to ensure the angle of refraction of about 17 degrees to the optical system with a magnification of 1:1, NA=0,15). Gratings with surface topography is capable of providing nearly 100% diffraction efficiency at small angles of refraction, however, with increasing angle of refraction of the diffraction efficiency decreases dramatically. In this case, the diffraction grating can be used volumetric hologram.

On figa and 6B shows respectively a view in sectional side view and a front view of a hybrid multiplex node diffraction grating-based surface lattice/volume hologram. On figa node 600 grating includes a layer 610 of the grating with surface relief, the adhesive layer 620, the layer 630 dimensional holograms, as well as a glass substrate 640. The node 600 grating has a Central region 615 (diffraction surface of the grating) and the peripheral region 625 (of diffraction volume hologram). The node 600 lattice, in General, has a round shape, as shown in figv.

Peripheral region 625 (of diffraction volume hologram) implements a three-dimensional hologram. If the volume on which ogramme diffraction grating is within the volume of the material of the hologram. The volume hologram has a medium to low diffraction efficiency for small angles of refraction (for example, less than 10 degrees) and potentially 100% diffraction efficiency for increased angles of refraction (e.g., greater than 10 degrees).

Thus, the diffraction node 600 effectively provides diffraction using Central region 615 (diffraction surface of the grating) for small angles of refraction. The node 600 also effectively provides diffraction for increased angles of refraction using peripheral region 625 (of diffraction volume hologram). The use of such node 600 can provide nearly 100% diffraction efficiency in a limited volume that is enclosed in the handle of the probe. An example of the shape of the beam for the node 600 is shown in Fig.7.

On Fig-10 shows the design of the connection of the fibers according to the principles of the present invention. On Fig shows the connection. The optical system is located in the housing 830, which connects the laser console with available laser probe. On Fig optical system (in this case, the lens 130 and the lens with a diffraction grating 210, although you may be used and other optical elements) located in the housing 830. Covered link 810 is located at one end of the building is sa 830, and covering the connecting link 820 is located at the other end of the housing 830. In one embodiment, the connecting links are standard connecting links SMA, however, can be used and other connecting links.

Figure 9 shows a partial view of the laser probe according to the principles of the present invention. The available multi-point laser probe includes a covered link 910, shell 920, which carries one or more optical fibers, arm 930 and the cannula 940, which ends three optical fibers 220, 230, 240 (each of which has a curved end).

Figure 10 shows the connection between the laser probe presented on Fig.9, and the connecting structure provided on Fig. Figure 10 covered with the connecting link 910 is engaged with covering a connecting link 820, attaching, thus, the laser probe to the laser generator. The optical system contained in a housing 830, provides diffraction of the incident beam, transforming into many beams passing through the optical fibers 220, 230, 240.

Figure 11 and 12 show views of the end construction of the connecting links in accordance with the principles of the present invention. Figure 11 shows end view covering connective C is s, and Fig - end view of the covered bridge. Spring-loaded ball 1110 engages in a groove 1210 and provides axial alignment of the optical fibers (shown as circles of small diameter) in the desired position. Other mechanical elements for alignment, such as grooves and mating protrusions can also be used for coaxial alignment of the optical fibers in the desired position.

On Fig shows a view in cross section of the laser probe. On Fig laser probe has a shell 1310 from polyvinyl chloride (PVC), arm 1320, optical fiber 1330, and the cannula 1340. The laser beam is emitted from the distal end of the fiber 1330.

On Fig shows a view in cross section of the laser probe with a diffraction grating according to the principles of the present invention. On Fig diffraction grating 1410 planted at the end of the cannula 1340. Optical fiber 1330 ends inside the cannula before 1340 diffraction grating 1340. Thus, the laser beam emitted from the optical fiber 130, passes through the diffraction grating 1410. As discussed earlier, the diffraction grating 1410 creates many diffracted beam spots. On Fig shows two diffracted beam, but in other embodiments, implementation of the present invention by passing the incident beam through a diffraction grating can be formed by rosolino the number of diffracted beams. In various embodiments of the present invention can be used for surface diffraction grating, a volume hologram or a combination thereof, as discussed above. In other embodiments, implementation of the diffraction grating 1410 may be configured to create different layouts spots, as discussed earlier.

On Fig shows the exploded view in cross section of the distal tip of the laser probe presented on Fig. In this drawing more clearly shows the arrangement of components and the beam trajectory. Fig also includes a centering cylinder 1510, made with the possibility of alignment of the optical fiber 1330 in the cannula 1340. The distal end of the optical fiber 1330 is located at a distance from the diffraction grating 1410 so that the beam emitted from the optical fiber 1330, could expand and fill the diffraction grating 1410, as shown. Diffraction grating 1410 performs diffraction beam in many directions, so that in the plane of the emitting fiber is a set of virtual images.

On Fig shows the exploded view in cross section of the distal tip of the laser probe, where the diffraction grating is endowed with optical power. Diffraction grating 1610 is configured to focus the diffracted beams. For example, diffraction the second grating can be made with the possibility of radiation multiple collimated diffracted beams. Collimated dragirovaniya beams lead to the formation of circuits with more concentrated location of the spots on the retina. In other embodiments, implementation of the diffraction grating 1610 is executed with a possibility of formation of converging diffracted beams.

From the foregoing it can be understood that the present invention provides an improved system for photocoagulation of the retina. Using a diffraction grating or a node, only the incident laser beam can be dimagiba education schemes spots suitable for photocoagulation of blood vessels of the retina. The present invention is shown here as example, and the average expert in the art can make various changes.

Other embodiments of the invention will become obvious to a person skilled in the art from consideration of the description and practical aspect of the invention presented here. It is assumed that the description and examples should be considered only as illustrative, the true nature and scope of the invention are defined by the subsequent claims.

1. Laser probe containing:
radiating optical fiber for emitting a light beam;
optical system at a side of the radiation emitting optical fiber into the at, when this optical system includes a diffraction surface for dragirovaniya light beam emitted from emitting optical fiber so that the light beam emitted from emitting optical fiber, dirrahiuma two or more diffracted light beams, and each of the two or more diffracted light beams are focused in a plane generally parallel to the diffraction surface; and
two or more receiving optical fibers, and each of the two or more receiving optical fibers is located opposite to the radiating optical fiber, the receiving ends of each of the two or more receiving optical fibers are located in a plane generally parallel to the diffraction surface, each of the two or more receiving optical fibers is used to receive the light beam, diffracted by the optical system.

2. The laser probe of claim 1, wherein the optical system further comprises:
the first lens element and
a second lens located opposite to the first lens, the second lens includes a diffractive surface.

3. Laser probe according to claim 2, in which the first lens is an aspheric lens and the second lens is an aspheric lens with a diffractive surface.

4. Laser probe according to claim 1, which which the optical system is arranged to dragirovaniya light beam, the emitted radiant optical fiber, with the formation of a two-dimensional array of beam spots.

5. The laser probe of claim 1, wherein the optical system includes a diffraction grating.

6. The laser probe of claim 1, wherein the optical system includes a hybrid multiplex node of the diffraction grating on the surface of the diffraction grating and/or a volume hologram.

7. Laser probe according to claim 6, in which the grid nodes further comprises:
the round section of the surface lattice, located in the center of the host lattice, and the section of the surface of the grating is designed to dragirovaniya incident beam with a smaller angle of refraction; and the annular section of the volume hologram located on the periphery of the section of the surface lattice, and the section of the volume hologram is designed to dragirovaniya incident beam with a larger angle of refraction.

8. Laser probe according to claim 1, in which at least one of the two or more receiving optical fibers has a curved distal end.

9. Laser probe according to claim 1, in which two or more receiving optical fibers are arranged such that each of the two or more receiving optical fibers is associated with a single light beam, diregiovani optical system.

10. Laser probe according to claim 1, additionally containing:
the building is, which at least partially encloses two or more receiving optical fibers.

11. Connection for the laser probe, containing:
case;
an optical system located in the housing, while the optical system includes a diffraction surface for dragirovaniya of the incident light beam so that the beam of incident light dirrahiuma two or more diffracted light beams, and each of the two or more diffracted light beams are focused in a plane generally parallel to the diffraction surface;
the first connecting link, located on one side of the optical system; and
the second connecting link, located on the other side of the optical system.

12. Connection by claim 11, in which the optical system further comprises:
the first lens element and
a second lens located opposite to the first lens, the second lens includes a diffractive surface.

13. The connection section 12, in which the first lens is an aspheric lens and the second lens is an aspheric lens with a diffractive surface.

14. Connection by claim 11, in which the optical system is arranged to dragirovaniya light beam emitted from emitting optical fiber, with the formation of a two-dimensional array of beam spots.

15. Connection by claim 11, in which the optical system includes a diffraction grating.

16. Connection by claim 11, in which the optical system includes a hybrid multiplex node of the diffraction grating on the surface of the diffraction grating and/or a volume hologram.

17. The connection clause 16, in which the grid nodes further comprises:
the round section of the surface lattice, located in the center of the host lattice, and the section of the surface of the grating is designed to dragirovaniya incident beam with a smaller angle of refraction; and
the annular section of the volume hologram located on the periphery of the section of the surface lattice, and the section of the volume hologram is designed to dragirovaniya incident beam with a larger angle of refraction.

18. Connection by claim 11, in which the first and second connecting links are connecting links SMA.

19. Connection by claim 11, in which at least one of the first and second connectors includes a mechanism for alignment of the optical fibers.

20. Ophthalmic laser probe containing:
radiating optical fiber for emitting a light beam and an optical system located on the side of the radiation emitting optical fiber, while the optical system includes a diffraction p is the surface, at least for dragirovaniya light beam emitted from emitting optical fiber into two or more diffracted light beam so that the light beam emitted from emitting optical fiber, dirrahiuma two or more diffracted light beams, and each of the two or more diffracted light beams are focused in a plane generally parallel to the diffraction surface.

21. Laser probe according to claim 20, in which the optical system includes a diffraction grating.

22. Laser probe according to claim 20, in which the optical system includes a hybrid multiplex node of the diffraction grating on the surface of the diffraction grating and/or a volume hologram.

23. Laser probe according to article 22, in which the grid nodes further comprises:
the round section of the surface lattice, located in the center of the host lattice, and the section of the surface of the grating is designed to dragirovaniya incident beam with a smaller angle of refraction; and the annular section of the volume hologram located on the periphery of the section of the surface lattice, and the section of the volume hologram is designed to dragirovaniya incident beam with a larger angle of refraction.

24. Laser probe according to claim 20, in which the optical system includes a diffraction grating made with the possibility of what callmerobbie.

25. Laser probe according to claim 20, further comprising:
a housing which at least partially encloses the radiating optical fiber.

26. Laser probe according to claim 20, further comprising:
the cannula, which at least partially encloses the radiating optical fiber.

27. Laser probe according to claim 20, which further comprises:
the centering cylinder located in the cannula, and the centering cylinder is designed for centering emitting optical fiber within the cannula.



 

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6 cl, 3 dwg

FIELD: physics, alarm.

SUBSTANCE: optical component of safety for authentication of document or product has plastic transparent film, which has at least one diffraction lattice. Embossed surface is at least partially coated with layer of dielectric material with high index of refraction, which creates effect of colouring into the first colour for the first orientation of component and into the second other colour for orientation that is perpendicular to the first orientation. Layer of dielectric material is coated from the side, which is opposite to direction of surveillance, by layer with low index of refraction, and then by contrast coloured layer having transparent zones and coloured zones, to increase differences of colouring in case of orientation variations.

EFFECT: improved optical characteristics of optical safety components due to improved differentiation of colouring variations.

12 cl, 4 dwg

FIELD: physics; technological processes.

SUBSTANCE: method of diffraction gratings manufacturing includes application of thin layer of magnetic liquid on substrate and influence with magnetic field on it. Thus for obtaining of hexagonal structure, thin layer of magnetic liquid on substrate is applied in the field of homogeneous constant magnetic field guided perpendicularly the plane of glass plate, forming system of identical drops. For obtaining of band structure use the nonuniform magnetic field guided under an acute angle to the glass plate plane. Magnetic liquid having highly volatile basis is used in the method.

EFFECT: reduction of material and time expenses at diffraction grating manufacturing.

2 cl, 6 dwg

FIELD: physics, optics.

SUBSTANCE: optical device of the laser resonator consisting of a plate of an optical material with a blanket, executed in the form of a diffraction grating with accents in the form of sequence of dimples or the blanket salients, differing that area Sxy of dimple or salient in the field of a blanket with in co-ordinates X and Y is spotted from expression where T - a continuance of following of dimples or salients, G1 - reflectivity or blanket gear transmissions, G2 - a reflectivity or gear transmissions of blanket in the field of dimple or salient, G (x, y) - demanded function of change of reflectivity or a gear transmission of an optical device of the laser resonator along co-ordinates X and Y.

EFFECT: obtaining of device with high coefficient of reflexion/transmission with any way given law of the change providing an apodisation of laser bundles in a wide spectroscopic range with high beam firmness.

6 cl, 5 dwg

FIELD: physics.

SUBSTANCE: protective coating has a layer of polymer material with shape memory, having a surface made of microlenses, where each microlens is associated with one of a plurality of images on the protective coating. The layer of polymer material with shape memory is sensitive to external stimulating effect, for example to temperature, a solvent or moisture, owing to transition from a first state in which the optical property of the microlens has a first value to a second state in which the optical property of the microlens has a second value. The microlenses have refracting surfaces which transmit light to positions in the protective coating, yielding a composite image from images formed on the protective coating when the layer of polymer material with shape memory is in one of a first or second state.

EFFECT: invention provides change in optical properties of the article as a result of the external effect.

9 cl, 19 dwg

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