Floodlight with fringe micro relief for observation system

FIELD: physics.

SUBSTANCE: observation system comprises floodlight with material arranged ahead of light emitting system and provided with fringe micro relief to diverge light beam in horizontal plane, said divergence exceeding two times that of source light beam inside light emitting system. Note here that said material does not in fact affect light beam divergence in vertical plane.

EFFECT: increased floodlight range, higher efficiency.

33 cl, 18 dwg

 

The technical FIELD

The present invention relates to the field of technical means of illumination in the infrared range to provide surveillance in low natural light and refractive technologies, in particular the special material with a diffractive microrelief. It also refers to the wide-angle video surveillance systems designed, for example, to read the license plates of vehicles on multilane highways.

BACKGROUND of INVENTION

In accordance with the law is inversely proportional to the quadratic dependence of the level of light intensity of the light falling on an object decreases inversely as the square of the distance to this object. When using the camera with the lens for an overview of typical surveillance zone the resulting image contains the foreground and background. The amount of light necessary or optimal for lighting the foreground area of an object, usually much less than the amount of light required to illuminate the background area of an object. In addition, areas of observed objects, usually more elongated in the horizontal direction, since most of the objects is located on the horizontal surface of the earth, which move people or vehicles.

Bo is isinto lighting systems forms a circular divergent beam of light, and when you use them with a camera technician who installed the systems must send the most intense part of the beam at the most remote point of the object. For a fixed distance to the object there exists an optimal profile of the beam vertically. When the surveillance is for the same distance and for a circular beam floodlight with increase in the divergence angle of the beam emitted them light the spotlight increasingly deviates from the optimal profile vertically, and in this case, most of the radiation is spent without any benefit. Moreover, since the most intense part of the light source is directed above the line object, then a significant portion of light passes over the target area and, therefore, not used.

There are many systems that use infrared illumination light for photographing or video in low natural light. Also there are many systems in which such illumination using LEDs. In some of these systems to receive scattered or focused lighting used refracting or reflecting elements.

Projectors that use LEDs with refractive or reflective elements to enhance the performance of lighting is, can contain different types of refractive elements that direct light from the LEDs in such a way as to change the distribution of illumination of the object and/or to increase the efficiency of lighting that saves energy consumption.

There are also a number of devices, in which light sources are provided with microprismatic or similar devices, refracting light for directions to the facility. Some of these devices are used in projectors or similar systems for rear illumination.

The need for the present invention is connected with the necessity of solving a number of technical problems associated with providing illumination for video surveillance using wide-angle equipment with a low level of natural lighting, in particular for capturing and recognition of license plates of cars in the conditions, when the surveillance camera can be aimed headlights of cars. There is a need to provide a pulsed illumination mode in the monitoring system for energy consumption. Also there is a need to synchronize the operation of the camera when using pulsed illumination of a moving object. In addition, there is a need for providing illumination of a wide area in the event of crossing vehicles bands Automag is strali or monitoring of cars, moving on several bands. There is also a need to ensure effective illumination, the angle of which corresponds to a viewing angle wide-angle cameras of high resolution read-moving plates having small dimensions compared to the dimensions of the field of observation, exciting all multi-lane highway.

The INVENTION

In the present invention, a system of surveillance illuminator in which the front light-emitting system such as, for example, the matrix infrared led lights installed material with a diffractive microrelief to change the shape of the light beam used to illuminate the object if necessary observations with the wide field of view at low level of natural lighting. The illumination field of the illumination characterized by elliptical Gaussian distribution. Floodlight designed for use with wide-angle surveillance camera, aspect ratio field of view which corresponds to the pattern of the spotlight. This combination with the characteristic of novelty, represents serious progress in improving the quality of illumination in video surveillance systems and for photographing and video shooting at night, because in this case, provided the TP is e pattern horizontally without compromising the optimality of the pattern vertically.

The present invention provides: the possibility of obtaining an asymmetric beam floodlight illumination, resulting in increased sensitivity at a wide-angle photo and video, for example in the case of monitoring traffic on multi-lane highways; optimization of the divergence angle of the light beam vertically in the distribution in accordance with the square of the cosecant for more effective illumination of the background; reducing the number of LEDs that would be used in known systems to support the new distribution; and the reduction of light pollution, including pollution in the invisible part of the spectrum.

The present invention may be useful for applications in intelligent systems ensure road safety, in which the observation of multi-lane highways is carried out using a wide-angle high-resolution cameras together with widescreen monitors. In the proposed in the present invention the surveillance system with floodlight provides less light in the upper and lower parts of the field of view, i.e. where it is not needed, and more light in the extended Central area. Therefore, the proposed surveillance system with floodlight provides energy savings. This system provides the eff is active using the light source of the lighting system with certain characteristics power and heat dissipation for lighting required zone, having a rather extended horizontally. Thus, in General, require less light to obtain images with high quality small parts of the objects in the scene, because the light more effectively concentrated on the parts of objects by using a material with a diffractive microrelief.

In the invention, a system of surveillance illuminator in which a material with a diffractive microrelief, which is "unidirectional", that is statistically more aimed for the light in the first plane compared to the other plane, for example in the horizontal plane than the vertical plane, positioned in front of light-emitting system containing light sources, such as, for example, a flat matrix of LEDs emitting light with a wavelength of about 850 nm, in the infrared range from 700 nm to 1000 nm. In the most effective embodiment of the invention, the system includes a surveillance camera, aspect ratio field of view which corresponds to the pattern of the spotlight, provide material with unidirectional diffractive microrelief, which is installed in front of the light-emitting system.

In accordance with the present invention can be used double layer of material with diffraction is the microrelief, which contains horizontal and vertical groups of materials for various asymmetric combinations of smaller subgroups forms of lenses, and in some combinations can be extended maximum angle of refraction.

In accordance with the present invention can also be used in a variety of materials with a diffractive microrelief above the middle line of the spotlight and below this line, which allows to obtain the asymmetric shape of the pattern vertically, resulting in more efficient use of light and, accordingly, increased the range of the searchlight.

Thus, the invention provides a substantial increase in range compared with the known lighting devices, for example, 110 m, compared with 54 m for a source of light containing the light-emitting diodes with scattering angle of light, equal to 60, to its diffraction at the surface. In addition, the present invention allows for a more even ratio of illumination of the foreground and background, allowing you to get significantly better images, because in this case, the camera should not adjust the exposure in the foreground; thus, the invention allows better use of the light directed to the target area.

A BRIEF DESCRIPTION of ORTEGA

Figure 1A is a schematic top view of part of the spotlight, which shows the passage of light rays emitted by the light-emitting system, through the material with unidirectional diffractive microrelief in which the diffraction of light in the horizontal plane.

Figure 1B is a schematic side view of part of the spotlight, which shows the passage of light rays emitted by the light-emitting system, through the material with unidirectional diffractive microrelief, which is negligible diffraction of light in the vertical plane.

Figure 2A is a view of a horizontal section of the material with unidirectional diffractive microrelief.

Figure 2A is a vertical section of the material with unidirectional diffractive microrelief.

Figure 3 - view structure of a material with a diffractive microrelief at high magnification.

Figure 4 is a perspective view of a rectangular led matrix, which shows the heat sink device and the source DC.

Figure 5 is a perspective view of a material with unidirectional diffractive microrelief, which is superimposed on the rectangular led matrix.

Figure 6 is a view of an object illuminated known infrared spotlight. On this view illustrates the reduction of energy density for circularly the beam of a searchlight, as the beam becomes wider to fit the length of an asymmetric object.

Figure 7 - view of the object illuminated by the illuminator uses rectangular led matrix material with unidirectional diffractive microrelief. You can see that when using an elliptical or asymmetrical pattern of light loss is practically absent.

Figure 8 is a view of another variant of implementation of the present invention, which is above the middle line of the spotlight uses a different material to ensure that the asymmetric pattern vertically.

Figure 9A is a graph of the distribution function of the light emitted by the illuminator in the coordinates of the amount of light and angle of divergence of the light beam horizontally. Shows the full width at half maximum value of the function (FWHM).

Figure 9A is a graph of the distribution function of the light emitted by the illuminator in the coordinates of the amount of light and angle of divergence of the light beam vertically. Shows the full width at half maximum value of the function (FWHM).

Figure 10A is a schematic view of a vehicle with the license plate, highlighted by the famous spotlight with a circular pattern.

Figure 10B is a schematic view of two cars with the license plates, under mechennymi beam of light with approximately the same cross-sectional area of the beam in the case of using a spotlight with a light-emitting system and a material with a diffractive microrelief.

Figure 11A is a schematic view of the controlled zone four-lane highway, illuminated by a spotlight from the light emitting system and a material with a diffractive microrelief, and a schematic view images of this area, obtained using a wide angle CCTV camera and displayed on a widescreen monitor.

Figure 11B is a schematic view of the controlled zone four-lane highway, illuminated by a spotlight from the light emitting system and a material with a diffractive microrelief, and receiving images using four cameras (two lanes in each moment of time). The combined image is displayed on a widescreen monitor.

Figure 12A is a top view of part of the spotlight, which shows the passage of light rays emitted by the light-emitting system, through a spherical lens for narrowing the beam before it passes through a material with unidirectional diffractive microrelief, which is horizontal diffraction of light.

Figure 12B is a side view of part of the spotlight, which shows the passage of light rays emitted by the light-emitting system, through a spherical lens for narrowing the beam before it passes through a material with unidirectional diffractive microrelief, which produced the walks minor vertical diffraction of light.

DETAILED description of the INVENTION

Figure 1A shows a schematic top view of a light emitting system 11, which contains almost a point light source, such as, for example, 12 and 13, emitting rays of light 17, passing through the material 14 with unidirectional diffractive microrelief, after which they diverge in the horizontal plane, as shown at point 18, so that the light rays 15 and 16 come under increased angles.

Figure 1B shows a schematic side view of a light emitting system, and a point light source 12 is shown at the top, as shown point sources 2, 3 are located below the plane of the figure 1A and therefore not visible. The light from the system 1 passes through the material 4 with a diffractive microrelief, and thanks to the characteristics of the one-way material 4 light passes through it without significant differences rays vertically at the point 8. The direction of the beams 5 and 6, light emitted from the illuminator, is practically unchanged.

In figure 2A, the light beam emitted by the led 20 and bounded by the beams 25, 26, passes through the lens 21 diffractive microrelief on an enlarged horizontal section of the strip 22 of material with a diffractive microrelief. The beams 25, 26 are refracted at a large angle at the points 23 and 24 of the lens 21 diffractive microrelief. New ray paths decree shall have the reference numbers 27, 28 and continuing source of rays is shown by the dashed lines.

In figure 2B, the light beam emitted by the led 30 and limited beams 34, 35, passes through an enlarged vertical section of a strip 32 of material with a diffractive microrelief. New ray paths 34, 35 are indicated by the reference numbers 36, 37, respectively, and coincide with their original trajectories. This is due to the fact that the structure of the strip of material with a diffractive microrelief almost straight vertically. At this magnification, absolutely no visible curvature, which could form the lens, and at points 31, 33 there is no visible deviation of the rays.

The figure 3 presents the segment of material with a diffractive microrelief, greatly magnified with a microscope, on which you can see refracting patterns 122, 123, 124, 125, whose dimensions are in the nanometer range and the shape of which resembles a wave. The length and relative straightness of the crests of the waves provide a much lower diffraction in the vertical plane than the horizontal plane. Passing in one direction nanometric structures provide the light refraction statistically different angles in different planes, for example in horizontal and vertical planes.

As can be seen in figure 4, pramogos the Naya led matrix 41 is installed in the frame 42 of the casing 43 of the spotlight. The casing 43 is provided with a device 45 of the heat sink and the source 46 DC. It can be mounted using the bracket 44. Front window 47 of the light-emitting matrix has the properties of an optical filter, which transmits almost all of the radiation in the infrared range and delaying radiation with shorter wavelengths.

The figure 5 shows the strip of material 50 with a diffractive microrelief, covering a small part of the led matrix 51. LEDs, such as LEDs 52, 54, seem slightly blurred under the sheet of material 50 with a diffractive microrelief. Led matrix 51 is placed in the casing 53.

In figure 6 it is seen that the energy density for the pie chart 71 orientation decreases as the beam becomes wider to cover asymmetric objects (72 - roof, 73 - house). The total energy divided by the area of the enlarged circle 70. As you can see, a lot of energy, passing above and below the object wasted.

The figure 7 shows that when using an elliptical or asymmetrical chart 81 orientation virtually no energy is wasted, as is the case of the pie chart 80, because the beam optimally illuminates a wide objects, such as, for example, the roof 82 and house 83. This provides very effective is a great use of available light increases the maximum achievable range image acquisition or decreases the number of lights needed for a specific application, or decreases the size of the required spotlight, and reduces the electrical power required for a specific application.

The figure 8 illustrates the use of the material above the center line 91 of the spotlight, which is different from the material below this line, for receiving an asymmetric chart 93 orientation in the vertical direction. Can be ensured more efficient use of light, resulting in increased range of the floodlight. Conventional floodlight pattern more similar to the curve 92 with a much greater length on the vertical axis 90.

In figure 9A the distribution of the light emitted by the illuminator is a bell-shaped curve. The vertical axis represents the magnitude of the amount of light and the horizontal axis is the angle of divergence of the horizontal beam of light emitted by the illuminator. The full width at half maximum value of the function (FWHM) is between -67,5 and +67,5, i.e. there is a significant divergence of the beam in the horizontal direction equal to 130, and the apex of the curve corresponds to 0, i.e. the center of the field of illumination.

In figure 9B the soap is the division of the light, the emitted light is a bell-shaped curve. The vertical axis represents the magnitude of the amount of light and the horizontal axis is the angle of vertical divergence of the light beam emitted from the floodlight. The full width at half maximum value of the function (FWHM) is between -6 and +6, i.e. the divergence of the vertical light emitted from the light very little.

In figure 10A schematically illustrates a backlight plate 62 of the object and reflectors 64 and 66 using a beam 60 of the light emitted by the known infrared spotlights. The resulting images are blurred due to insufficient light levels. This problem arises from the fact that in the known spotlights a lot of light is wasted on lighting the background.

In figure 10B schematically shows the illumination of the two lanes of highway, separated by a dotted line 68, a wider beam 61 spotlight surveillance system using diffractive microrelief. On the left lane is clearly visible license plate 63 and the reflectors 65 and 67, illuminated elliptical beam 61 of the light emitted by the lamp that uses light-emitting system and a material with a diffractive microrelief. Due to the increased efficiency of the backlight in this case also highlighted and nome is Noah the sign 69 of the object on the right lane despite the fact that the total area and the total radiation power on figure 10B comparable to the variant of figure 10A. Material with a diffractive microrelief is formed and arranged in such a way that it formed an elliptical Gaussian distribution of the refracted light with a major axis lying in a horizontal plane, and the angular divergence of the light of the led matrix in the horizontal plane is increased more than twice, and the angular divergence in the vertical plane does not practically change material with a diffractive microrelief. When using a CCTV system for reading license plates material with unidirectional diffractive microrelief provides overlapping illuminated several lanes of highway with the same or a less powerful light source, as in the spotlights of the existing video surveillance systems, resulting in more effectively using the controlled lighting zone.

Figure 11A illustrates the spotlight 201, which uses light-emitting system and a material with a diffractive microrelief and which provides a backlight controlled zone 211, covering a four-lane highway 213. The image of motorway are using a wide angle camera 202 CCTV, transmitting the obtained image 215 in iroroenenly monitor 203. Arrow 200, the exhaust from the spotlight, show the rays of light coming. Arrow 199, aimed at the camera, showing rays of light coming from the illuminated controlled zone 211.

Figure 11B illustrates the spotlight 204, which uses light-emitting system and a material with a diffractive microrelief and which provides a backlight controlled zone 212, representing a four-lane highway 214. Image motorway is formed with four kompleksirovanii specialized chambers 205, 206, 207, 208. Camera 205 and 206 together and make light, shown directed down arrows 210, which comes from the two left lanes of highway. One of the cameras can be optimized for day and another for night. In an alternative embodiment, one camera can be optimized to capture images of license plates, and the other to capture images of the driver or passengers. Camera 207 and 208 provide images of the two right lanes illuminated highway 214. They can be optimized to work in different conditions, similar to the chambers 205 and 206. Illumination at wide angle multi-lane highways, provided by the surveillance system may be pulsed to synchronize with the input signal is, contains information about number plates or passenger cars, wide angle camcorder high definition. Then the output signals of the camera surveillance system can be processed using OCR alphanumeric information to obtain digital numbers of cars passing on the highway. The image is a wide multi-lane highway 216 is shown displayed properly on a widescreen monitor 217.

Led matrix with a standard angle of divergence of the illumination beam of radiation, equal to 120, can be used in combination with a spherical lens with an angle of 6 to seivane light beams, which are then refracted in the same plane on the diffractive microrelief. Figure 12A shows a top view of a matrix 311 emitting LEDs, containing almost point light sources, such as sources 312 and 313, the rays 317 of light which pass through the spherical lens 321 and 322, the angle of divergence of the light beams is reduced (beams 323 and 324). Then, the light rays pass through the material 315 with unidirectional diffractive microrelief, with the result that they diverge horizontally at point 318, so that the emergent light beams 315 and 316 will be out of the spotlight at large angles. Figure 12B shows a schematic vidsrose light-emitting system 331, and the point source of light 312 is shown at the top, as shown point sources 332, 333 are located below the plane of the figures 12A and because it is not visible. Light rays 325 emitted by the matrix 331, pass through the spherical lens 326, causing the light beams become (rays 327 and 328). Then the light rays passing through the material 334 with a diffractive microrelief, and thanks to the characteristics of the one-way material the light passes through it without significant differences rays vertically at point 338. Facing the light rays 335 and 336 almost do not change their directions (rays 327 and 328) when passing through a material with a diffractive microrelief.

The invention can be implemented in other specific forms, with an additional (optional) elements and auxiliary devices that do not alter its essence or essential features. Therefore, the above variant of the invention should be considered in all respects as an illustration, in no way limiting the scope of the invention defined by the attached formula, and thus, any changes that may be part of equivalents of the claims covered by this formula.

1. Surveillance system with floodlight, in which the front light-emitting system installed material with odenplan is authorized diffractive microrelief, which provides the divergence of the light beam in the horizontal plane, which is more than twice the divergence of the beam from the light source inside the light-emitting system, and the material practically does not change the divergence of the light beam in the vertical plane.

2. Surveillance system with floodlight according to claim 1 containing additionally a surveillance camera, aspect ratio field of view which corresponds to the pattern of the spotlight, provide material with unidirectional diffractive microrelief, which is installed in front of the light-emitting system.

3. Surveillance system with floodlight according to claim 1, in which the light-emitting system is flat led matrix.

4. Surveillance system with floodlight according to claim 1, in which the light-emitting system emits infrared light.

5. Surveillance system with floodlight according to claim 1, in which the light source in the light-emitting system attached to the device heat sink for heat removal to the rear part of the housing of the searchlight.

6. Surveillance system with floodlight according to claim 1, in which the material with a diffractive microrelief attached with adhesive to the front plate of the light-emitting system.

7. Surveillance system with floodlight according to claim 3, in which the light-emitting system is provided in front of the im window, having the properties of an optical filter that transmits almost all of the radiation in the infrared range and delaying radiation with shorter wavelengths.

8. Surveillance system with floodlight according to claim 1, in which the material with a diffractive microrelief formed and performed in such a manner that an elliptical Gaussian distribution of the refracted light, the illumination controlled area.

9. The surveillance system with the spotlight on p. 8, in which the main axis of the diffraction lies in the horizontal plane.

10. Surveillance system with floodlight according to claim 1, in which the material with a diffractive microrelief provides horizontal divergence of the outgoing light, which exceeds the angular divergence of the outgoing light source light-emitting system from 2 to 13 times.

11. Surveillance system with floodlight of claim 8, in which the material with a diffractive microrelief provides a light beam with a full width at half maximum angle of divergence of the horizontal distribution of the Gaussian distribution, the value of which lies in the range 30-130.

12. Surveillance system with floodlight of claim 8, in which the material with a diffractive microrelief provides a light beam with a full width at half maximum angle of divergence of the vertically him Gaussian distribution, the value of motorolai in the range of 6-12.

13. Surveillance system with floodlight according to claim 1, in which the material with a diffractive microrelief is selected from the group consisting of polycarbonate, polyester, acrylic or glass.

14. Surveillance system with floodlight according to claim 1, in which the material with a diffractive microrelief is the lens in the horizontal plane.

15. Surveillance system with floodlight according to claim 1, in which the material with a diffractive microrelief is the diffuser, providing an elliptical pattern.

16. Surveillance system with floodlight according to claim 1, which is equipped with a second layer of material with a diffractive microrelief, superimposed on the first layer of material with a diffractive microrelief, and the first and second layers have different characteristics to the diffraction of light, so that the first and second layers together to provide a directional pattern which is more asymmetric vertically than horizontally.

17. Surveillance system with floodlight according to claim 1, which has a number of plug-in additional layers of materials with a diffractive microrelief, with different characteristics of the diffraction of light, to provide flexibility in obtaining various directional diagrams depending on the characteristics of the controlled zone.

18. Surveillance system with floodlight according to claim 3, containing rectangular led lights-Senso is the same matrix.

19. Surveillance system with floodlight according to claim 3, containing circular led matrix.

20. The surveillance system with the spotlight on p, in which the ratio of the horizontal axis of the flat rectangular led matrix to the vertical axis is 16:14.

21. Surveillance system with floodlight according to claim 1, in which the Central wavelength of a flat rectangular led matrix is in the range of 700-1000 nm.

22. Surveillance system with floodlight according to claim 3, in which the ratio of angular expansion material with a diffractive microrelief light beams emitted by the LEDs flat matrix, horizontally and vertically more than 2.

23. Surveillance system with floodlight according to claim 1, in which the radiation source of illumination is a laser diode.

24. Surveillance system with floodlight according to claim 3, in which the flat led matrix is supplied from the constant current source.

25. Surveillance system with floodlight according to claim 1, in which the light-emitting system generates radiation illumination with increased angle of divergence of the rays, which is sent by the system in a controlled area, is a pulse for synchronization with the input signal from the controlled area in wide angle camcorder high definition.

26. The surveillance system with the spotlight on A.25, in which the emission is backlight with increased angle of divergence of the rays, reflected from objects on the motorway and received by the camera is processed in the module recognition of alphanumeric information for conversion into digital form information license plates of vehicles moving on the highway.

27. The surveillance system with the spotlight on p, in which the radiation of the illumination with the increased angle of divergence of the rays reflected from objects on a multi-lane highway and received by the camera is processed in the module recognition of alphanumeric information for conversion into digital form information license plates of vehicles moving in different lanes of highway in the direction of the system.

28. Surveillance system with floodlight according to claim 1, in which the material with a diffractive microrelief, located above the middle line of the spotlight, differs from the lower set of material with a diffractive microrelief, to obtain an asymmetric pattern vertically and longer range illumination.

29. Surveillance system with floodlight according to claim 1, in which the material with unidirectional diffractive microrelief is a strip containing nanometric structure, which in General provides a refraction of light at different angles in the horizontal and vertical planes.

30. Si is the subject of the surveillance illuminator according to claim 1, which are equipped with multiple cameras to obtain images from the wide-angle zone of the object.

31. Surveillance system with floodlight according to claim 1, in which the led matrix with the advanced angle circular pattern superimposed matrix of the lenses to narrow beams of light entering the material with unidirectional diffractive microrelief.

32. Surveillance system with floodlight according to claim 1, in which:
light-emitting system has a variety of light sources, which are flat matrix infrared LEDs attached to the heat sink for the dissipation of heat to the back of the case spotlights, and fed from the constant current source, while the matrix led provides illumination with increased angle of the circular pattern, and it imposed a matrix of lenses for narrow beams of light entering the material with unidirectional diffractive microrelief;
before light-emitting matrix set front window with the properties of the optical filter, which transmits almost all of the radiation in the infrared range and delaying radiation with shorter wavelengths;
material with a diffractive microrelief is a strip containing nanometric structure, which, in General, both the accounts for the refraction of light at different angles in the horizontal and vertical planes and is thus to provide an elliptical Gaussian distribution for the refracted light from the main axis of the diffraction in the horizontal plane, and the divergence of the light beam in the horizontal plane is more than twice the angular divergence of the light beams emitted by the LEDs, and a material with a diffractive microrelief virtually no effect on the angular divergence in the vertical plane.

33. Surveillance system with spotlight in clause 29, in which a wide angle beam of light emitted by the system on a multi-lane highway in a pulsed mode in order to synchronize the input signals from the license plates of vehicles moving in the direction of the system in the wide-angle video camera high resolution, and the received signal is processed in the module recognition of alphanumeric information for conversion into digital form information license plates of vehicles moving on the highway.



 

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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: 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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