Lens array, sensor array and lighting device

Abstract

The present invention provides a lens array, a sensor array, and a lighting device. The lens array includes a plurality of first lens units and a plurality of second lens units arranged in an array, the first lens units and the second lens units having different filtering wavelength ranges, and the first lens units and the second lens units being alternately arranged in a target direction, the target direction including a first direction and a second direction. In an embodiment of the present invention, a lens array is formed by providing a first lens unit and a second lens unit having two lens units with different filtering wavelengths, and the first lens unit and the second lens unit are alternately arranged in different directions. Different lens units in the lens array can filter light of different wavelengths, thereby improving the applicability of the lens array and helping to meet more usage requirements.

Description

Technical Field

[0001] The present invention relates to the field of optoelectronic technology, and in particular to a lens array, a sensor array and a lighting device. Background Art

[0002] In order to achieve the imaging function, a lens is usually required in an imaging device, an image acquisition device, etc. to adjust the propagation direction of light. In the related art, the function of the lens is relatively single and it is difficult to meet the imaging requirements of different usage needs. Summary of the Invention

[0003] Embodiments of the present invention provide a lens array, a sensor array, and a lighting device to solve the problem that existing lenses have relatively single functions and are difficult to meet imaging requirements in different usage needs.

[0004] In a first aspect, an embodiment of the present invention provides a lens array, comprising a plurality of first lens units and a plurality of second lens units arranged in an array, wherein the first lens units and the second lens units have different filtering wavelength ranges, and the first lens units and the second lens units are alternately arranged in a target direction, and the target direction includes a first direction and a second direction.

[0005] In some embodiments, one of the first lens unit and the second lens unit is an octagonal lens, and the other is a quadrilateral lens, and at least one boundary dimension of the first lens unit is adapted to at least one boundary dimension of the second lens unit so that the multiple first lens units and the multiple second lens units are seamlessly spliced.

[0006] In some embodiments, one of the first lens unit and the second lens unit is in a regular octagonal shape, and the other is in a square shape, and a side length of the first lens unit is equal to a side length of the second lens unit.

[0007] In some embodiments, the area of the first lens unit is greater than that of the second lens unit, and the filtering wavelength range corresponding to the first lens unit is greater than the filtering wavelength range corresponding to the second lens unit.

[0008] In some embodiments, the filtering wavelength range of the first lens unit is the full wavelength range, and the filtering wavelength range of the second lens unit is any one of red light, blue light and green light.

[0009] In some embodiments, the number of second lens units adjacent to the first lens unit is four, and the filtering wavelengths corresponding to the four second lens units adjacent to the same first lens unit are red, blue, green, and green, respectively.

[0010] In some embodiments, an area ratio of the first lens unit to the second lens unit is 3:1 to 1:1.

[0011] In second aspect, an embodiment of the present invention provides a sensor array, comprising a plurality of first photosensitive units and a plurality of second photosensitive units arranged in an array, wherein the wavelength ranges of the light collected by the first photosensitive units and the second photosensitive units are different, and the first photosensitive units and the second photosensitive units are alternately arranged in a target direction, and the target direction includes a first direction and a second direction.

[0012] In some embodiments, the first photosensitive unit includes a first excitatory photosensitive unit and a first inhibitory photosensitive unit;

[0013] The first excitatory photosensitive unit, the first inhibitory photosensitive unit and the second photosensitive unit are arranged in an array to form a pixel unit.

[0014] In some embodiments, the first excitatory photosensitive unit and the first inhibitory photosensitive unit are both used to extract light signals of a first set band and convert the light signals of the first set band into current signals. The first photosensitive unit is also used to output a current signal representing the light intensity change of the light signal of the first set band based on the difference between the current signals converted by the first excitatory photosensitive unit and the first inhibitory photosensitive unit. The first set band includes an ultraviolet band.

[0015] In a third aspect, an embodiment of the present invention provides a lighting device, comprising a lens array and a sensor array;

[0016] Wherein, the lens array is the lens array described in any one of the first aspects, and / or the sensor array is the sensor array described in any one of the second aspects.

[0017] In some embodiments, the lens array is the lens array described in any one of the first aspects, and the sensor array is the sensor array described in any one of the second aspects, and each of the first photosensitive unit or the second photosensitive unit corresponds to a first lens unit or a second lens unit.

[0018] In an embodiment of the present invention, a lens array is formed by providing a first lens unit and a second lens unit having two lens units with different filtering wavelengths. The first lens unit and the second lens unit are alternately arranged in different directions. Different lens units in the lens array can filter light of different wavelengths, thereby improving the applicability of the lens array and helping to meet more usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 is a structural schematic diagram of a lens unit provided by an embodiment of the present invention;

[0021] Figure 2 is a structural schematic diagram of another lens unit provided by an embodiment of the present invention;

[0022] Figure 3 3 is a schematic structural diagram of another lens unit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0024] The present invention provides a lens array.

[0025] like Figure 1 As shown, in one embodiment, the lens array includes a plurality of first lens units 101 and a plurality of second lens units 102 arranged in an array, the first lens units 101 and the second lens units 102 are lens units with different filtering wavelength ranges, and the first lens units 101 and the second lens units 102 are alternately arranged in a target direction, and the target direction includes a first direction and a second direction.

[0026] In this embodiment, the first direction and the second direction are different directions. For example, the angle between the first direction and the second direction can be different angles. Specifically, the angle between the first direction and the second direction can be different angles such as 30° and 60°.

[0027] In one embodiment of the present application, the angle between the first direction and the second direction is 90°. Figure 1 As shown, the OX direction represents the first direction, and the OY direction represents the second direction, that is, the first direction and the second direction are perpendicular to each other.

[0028] In this embodiment, the first lens unit 101 and the second lens unit 102 have different filtering wavelength ranges.

[0029] In one embodiment, the first lens unit 101 and the second lens unit 102 filter different wavelengths.

[0030] It should be understood that the wavelengths of light of different colors are different. By setting the filtering wavelengths of the first lens unit 101 and the second lens unit 102 to be different, it is possible to respectively utilize the first lens unit 101 and the second lens unit 102 to transmit light of different colors, thereby realizing a display or light collection function.

[0031] In the embodiment of the present invention, a lens array is formed by providing a first lens unit 101 and a second lens unit 102, which are lens units with different filtering wavelengths. In addition, the first lens unit 101 and the second lens unit 102 are alternately arranged in different directions. Different lens units in the lens array can filter light of different wavelengths, thereby improving the applicability of the lens array and helping to meet more usage requirements.

[0032] In this embodiment, the focal lengths of the first lens unit 101 and the second lens unit 102 may be the same or different.

[0033] In one embodiment, the first lens unit 101 and the second lens unit 102 have different focal lengths. The first lens unit 101 and the second lens unit 102 can respectively converge light onto planes at different distances from the lens array. In this way, the electrical components corresponding to the first lens unit 101 and the second lens unit 102, such as light sensors, can be staggered.

[0034] It should be understood that the area within the same plane is limited, and the number of light sensors that can be installed is also limited. By setting the focal lengths of the first lens unit 101 and the second lens unit 102 to be different, the light sensors corresponding to different lens units can be set on different planes, thereby expanding the installation area of the light sensors in each plane, reducing the display of the light sensor installation conditions, and helping to improve the light collection effect.

[0035] In some embodiments, one of the first lens unit 101 and the second lens unit 102 is an octagonal lens, and the other is a quadrilateral lens. In this embodiment, the first lens unit 101 is an octagonal lens, and the second lens unit 102 is a quadrilateral lens.

[0036] At least one boundary dimension of the first lens unit 101 is adapted to at least one boundary dimension of the second lens unit 102 , so that the plurality of first lens units 101 and the plurality of second lens units 102 are seamlessly spliced.

[0037] By configuring the first lens unit 101 and the second lens unit 102 to be octagonal and quadrilateral, respectively, wherein four sides of each octagonal lens are adjacent to the other octagonal lenses, and the other four sides are adjacent to the four sides of the quadrilateral lens, ignoring stitching errors, the lengths of the adjacent sides of the quadrilateral lens and the octagonal lens are equal. In this way, the first lens unit 101 and the second lens unit 102 can be seamlessly stitched together, which helps to improve the light transmittance per unit area.

[0038] like Figure 1 As shown, in some embodiments, one of the first lens unit 101 and the second lens unit 102 is a regular octagon, and the other is a square, and the side length of the first lens unit 101 is equal to the side length of the second lens unit 102.

[0039] In some other embodiments, the lengths of adjacent sides are increased or decreased while maintaining the same length, thereby adjusting the area ratio of the first lens unit 101 and the second lens unit 102 while maintaining seamless splicing of the plurality of first lens units 101 and the plurality of second lens units 102 to adapt to different usage requirements.

[0040] like Figure 2 As shown, in some other embodiments, the second lens unit 102 is two groups of rectangular lenses with unequal opposite sides. Correspondingly, the lengths of the sides of the first lens unit 101 are not completely equal, which can also achieve seamless splicing of the first lens unit 101 and the second lens unit 102.

[0041] In an optional embodiment, the area of the first lens unit 101 is larger than that of the second lens unit 102 , and the filtering wavelength range corresponding to the first lens unit 101 is larger than that corresponding to the second lens unit 102 .

[0042] The side lengths of the octagonal lens and the quadrilateral lens are adjustable.

[0043] It should be understood that, in this embodiment, different filtering effects for light of different wavelengths can be achieved by adjusting the areas of the first lens unit 101 and the second lens unit 102 .

[0044] In some embodiments, an area ratio of the first lens unit 101 to the second lens unit 102 is greater than 1, that is, the area of the first lens unit 101 is greater than the area of the second lens unit 102 .

[0045] During implementation, the areas and area ratio of the first lens unit 101 and the second lens unit 102 can be determined as needed. Furthermore, the side lengths of the first lens unit 101 and the second lens unit 102 can be determined based on the determined areas and area ratio, thereby achieving different filtering effects.

[0046] For example, in one embodiment, the first lens unit 101 is an octagonal lens, and the second lens unit 102 is a quadrilateral lens. First, the shape and size of the second lens unit 102 are determined as needed. Accordingly, the length of the side adjacent to the first lens unit 101 and the second lens unit 102 is also determined.

[0047] Furthermore, the area ratio of the first lens unit 101 to the second lens unit 102 can be set as needed. The area ratio can be a ratio of various sizes, such as 3:1, 5:1, 7:1, or 3.6:1. After determining the area ratio, the area of the first lens unit 101 can be determined. In this way, the lengths of the other four sides of the first lens unit 101 and the size of the inner angle of the first lens unit 101 can be further set, so that the area of the first lens unit 101 meets the requirements.

[0048] Please also see Figure 1 and Figure 3 In the lens arrays of the two embodiments shown, in both embodiments, the second lens units 102 are square lenses, and the first lens units 101 are octagonal lenses. However, in both embodiments, the lengths of the non-adjacent sides of the first lens unit 101 and the second lens unit 102 are unequal, so that the first lens unit 101 and the second lens unit 102 have different area ratios.

[0049] In one embodiment, the filtering wavelength range corresponding to the first lens unit 101 allows red light to pass through, and the filtering wavelength range corresponding to the second lens unit 102 allows green light to pass through. If it is desired to increase the passing ratio of red light, the area of the first lens unit 101 is controlled to increase, and the area of the second lens unit 102 is controlled to decrease.

[0050] During implementation, the first lens unit 101 and the second lens unit 102 of different sizes may be selected according to specific needs to adjust the area ratio of the first lens unit 101 and the second lens unit 102 .

[0051] In some embodiments, the area ratio of the first lens unit 101 to the second lens unit 102 is 3:1 to 1:1, which can provide a good filtering effect for light of different wavelengths.

[0052] In this embodiment, the filtering wavelength ranges of the first lens unit 101 and the second lens unit 102 may not overlap at all or may only overlap partially.

[0053] For example, the first lens unit 101 may correspond to the wavelength range of visible light, and the second lens unit 102 may correspond to the wavelength range of ultraviolet light or infrared light. In this way, separate collection of ultraviolet light and infrared light can be achieved. For another example, the first lens unit 101 may correspond to the wavelength range of the entire band, and the second lens unit 102 may correspond to light in a specific range, for example, one or more of red, blue, green, ultraviolet light, and infrared light, thereby achieving separate filtering of light in the specific range.

[0054] In one embodiment, the filtering wavelength range of the first lens unit 101 is the full wavelength range, and the filtering wavelength range of the second lens unit 102 is any one of red light, blue light and green light.

[0055] In some embodiments, the number of the second lens units 102 adjacent to the first lens unit 101 is four, and the filtering wavelengths corresponding to the four second lens units 102 adjacent to the same first lens unit 101 are red, blue, green, and green, respectively.

[0056] like Figure 1 As shown, for example, the first lens unit 101 is an octagonal lens, and the second lens unit 102 is a quadrilateral. For the area outside the edge region, there are four second lens units 102 adjacent to each first lens unit 101. The first lens unit 101 filters all wavelengths, meaning that all colors of light can pass through it. The second lens units 102 filter red, blue, green, and green, respectively. That is, of the four second lens units 102 adjacent to the first lens unit 101, one filters red, one filters blue, and two filters green.

[0057] The technical solution of the embodiment of the present invention can provide two different filtering effects by setting up a lens array including lens units with two different filtering ranges, so as to further sense different light, broaden the application scenarios of the lens array, and improve the filtering effect for light of specific wavelengths.

[0058] In one embodiment, the first lens unit 101 and the second lens unit 102 may be formed by independently arranged lenses.

[0059] In some other embodiments, the lens array includes a transparent substrate, on which a filter layer may be provided to achieve a filtering effect for light of different wavelengths. For example, if the first lens unit 101 is configured to allow red light to pass through, a filter layer corresponding to red light may be provided in a specific region. In this way, the region where the filter layer is located is equivalent to forming the first lens unit 101. For another example, if it is desired that the second lens unit 102 allow light of a full wavelength band to pass through, a filter layer that allows light of a full wavelength band to pass through may be provided in a specific region, or no filter layer may be provided, allowing light to pass directly through the transparent substrate. In this way, this region is equivalent to forming the second lens unit 102.

[0060] An embodiment of the present invention further provides a sensor array.

[0061] In this embodiment, the sensor array includes a plurality of first photosensitive units and a plurality of second photosensitive units arranged in an array. The wavelength ranges of the light collected by the first photosensitive units and the second photosensitive units are different. The first photosensitive units and the second photosensitive units are alternately arranged in the target direction, and the target direction includes the first direction and the second direction.

[0062] The arrangement of the first photosensitive unit and the plurality of second photosensitive units in the sensor array of this embodiment can be referred to Figure 1 The arrangement of the first lens unit 101 and the second lens unit 102 will not be described in detail here.

[0063] In this embodiment, the first photosensitive unit and the second photosensitive unit are respectively used to use light in different wavelength ranges. In other words, the first photosensitive unit and the second photosensitive unit are respectively sensitive to light in different wavelength ranges, thereby enabling the collection of light in the wavelength range.

[0064] In this embodiment, the wavelength ranges of the light collected by the first photosensitive unit and the second photosensitive unit may overlap or may not overlap.

[0065] In one embodiment, the first sensor unit can be used to collect light of full wavelength bands, and the first sensor unit can be used to collect one or more of ultraviolet light, infrared light, red light, blue light or green light.

[0066] By arranging the first sensor unit and the second photosensitive unit to respectively collect light in different wavelength ranges, the accuracy of light collection can be improved.

[0067] Photosensitive Unit In some embodiments, the first photosensitive unit includes a first excitatory photosensitive unit and a first inhibitory photosensitive unit; the first excitatory photosensitive unit, the first inhibitory photosensitive unit, and the second photosensitive unit are arranged in an array to form a pixel unit.

[0068] The pixel unit may be a pixel unit in a pixel sensing structure of a dual-modal ultraviolet bionic vision sensor.

[0069] The lighting device of the technical solution of the embodiment of the present invention can be applied to a dual-modal ultraviolet bionic visual sensor, which is used to simulate different visual perception cells in the retina of the human eye. The light signal of the first set band in the target light signal is sensed by the first photosensitive unit, and a current signal representing the light intensity change of the light signal in the first set band is output to simulate the rod cells to obtain light intensity gradient information, thereby improving the sensor's perception ability of dynamic targets, increasing the dynamic range of the image collected by the sensor, and improving the shooting speed of the sensor; the light signal of the second set band in the target light signal is sensed by the second photosensitive unit, and a voltage signal representing the light intensity of the light signal in the second set band is output to simulate the cone cells to obtain color intensity information, which is beneficial to improving the color reproduction and image quality of the image taken by the sensor.

[0070] The technical solution of the embodiment of the present invention can provide two different filtering effects by setting up a photosensitive unit array including two different lens units, so as to further sense different light and further broaden the application scenarios of the sensor.

[0071] In some embodiments, the first excitatory photosensitive unit and the first inhibitory photosensitive unit are both used to extract light signals of a first set band and convert the light signals of the first set band into current signals. The first photosensitive unit is also used to output a current signal representing the change in light intensity of the light signal of the first set band based on the difference between the current signals converted by the first excitatory photosensitive unit and the first inhibitory photosensitive unit. The first set band includes an ultraviolet band.

[0072] In this way, the dual-modal ultraviolet bionic vision sensor can also perceive the color intensity information and / or intensity change information of ultraviolet rays in the target light signal, so that the dual-modal ultraviolet bionic vision sensor can be widely used in ultraviolet cameras in fields such as medicine.

[0073] An embodiment of the present invention further provides a light-emitting device, comprising a lens array and a light-emitting unit, wherein the lens array is the lens array according to any one of the first aspects.

[0074] In this embodiment, each light emitting unit is disposed corresponding to a first lens unit 101 or a second lens unit 102 in the lens array, thereby achieving different filtering effects on the light emitted by the light emitting unit.

[0075] The embodiment of the present invention further provides a lighting device, comprising a lens array and a light sensor, wherein the lens array is any lens array in the first aspect. The lighting device in this embodiment can be a device for light collection, such as a camera or a bionic eye.

[0076] The lens array may be any of the lens arrays in the aforementioned lens array embodiments, and the sensor array may be any of the sensor arrays in the aforementioned sensor array embodiments. Thus, the lighting device in this embodiment can achieve all the technical effects of the aforementioned lens arrays and / or light sensors, and will not be further described here.

[0077] In some embodiments, the lighting device includes both the lens array of the lens array embodiment and the sensor array of the sensor array embodiment, and each first photosensitive unit or second photosensitive unit corresponds to a first lens unit 101 or a second lens unit 102 in the lens array. By making different photosensitive units correspond to corresponding lens units, the collection effect of light of specific wavelengths can be improved, and the collection of interfering light can be reduced.

[0078] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A lens array, applied to a lighting device, wherein the lighting device includes a sensor array, characterized in that: The lens comprises a plurality of first lens units and a plurality of second lens units arranged in an array, wherein the first lens units and the second lens units have different filtering wavelength ranges, and the first lens units and the second lens units are alternately arranged in a target direction, wherein the target direction includes a first direction and a second direction; One of the first lens unit and the second lens unit is an octagonal lens, and the other is a quadrilateral lens, and at least one boundary dimension of the first lens unit is adapted to at least one boundary dimension of the second lens unit, so that the plurality of first lens units and the plurality of second lens units are seamlessly spliced; wherein the first lens unit and the second lens unit have no overlap; The lens unit corresponds to the photosensitive unit of the sensor array.

2. The lens array according to claim 1, wherein: One of the first lens unit and the second lens unit is in a regular octagonal shape, and the other is in a square shape. A side length of the first lens unit is equal to a side length of the second lens unit.

3. The lens array according to claim 1, wherein: The area of the first lens unit is greater than that of the second lens unit, and the filtering wavelength range corresponding to the first lens unit is greater than the filtering wavelength range corresponding to the second lens unit.

4. The lens array according to claim 3, wherein: The filtering wavelength range of the first lens unit is the full wavelength range, and the filtering wavelength range of the second lens unit is any one of red light, blue light and green light.

5. The lens array according to claim 3, wherein: The number of the second lens units adjacent to the first lens unit is four, and the filtering wavelengths corresponding to the four second lens units adjacent to the same first lens unit are red, blue, green and green respectively.

6. The lens array according to any one of claims 3 to 5, wherein: An area ratio of the first lens unit to the second lens unit is 3:1 to 1:

1.

7. A sensor array, characterized in that: The device comprises a plurality of first photosensitive units and a plurality of second photosensitive units arranged in an array, wherein the wavelength ranges of the light collected by the first photosensitive units and the second photosensitive units are different, and the first photosensitive units and the second photosensitive units are alternately arranged in a target direction, and the target direction includes a first direction and a second direction; One of the first photosensitive unit and the second photosensitive unit is an octagonal structure, and the other is a quadrilateral structure, and at least one boundary dimension of the first photosensitive unit is adapted to at least one boundary dimension of the second photosensitive unit, so that the plurality of first photosensitive units and the plurality of second photosensitive units are seamlessly spliced; Wherein, the first photosensitive unit and the second photosensitive unit have no overlap.

8. The sensor array according to claim 7, wherein: The first photosensitive unit includes a first excitatory photosensitive unit and a first inhibitory photosensitive unit; The first excitatory photosensitive unit, the first inhibitory photosensitive unit and the second photosensitive unit are arranged in an array to form a pixel unit.

9. The sensor array according to claim 8, wherein: The first excitatory photosensitive unit and the first inhibitory photosensitive unit are both used to extract light signals of a first set band and convert the light signals of the first set band into current signals. The first photosensitive unit is also used to output a current signal representing the light intensity change of the light signal of the first set band based on the difference between the current signals converted by the first excitatory photosensitive unit and the first inhibitory photosensitive unit. The first set band includes an ultraviolet band.

10. A lighting device, characterized in that: including a lens array and a sensor array; Wherein, the lens array is the lens array according to any one of claims 1 to 6, and / or the sensor array is the sensor array according to any one of claims 7 to 9.

11. The lighting device according to claim 10, characterized in that: When the lighting device comprises the lens array according to any one of claims 1 to 6 and the sensor array according to any one of claims 7 to 9, each of the first photosensitive unit and the second photosensitive unit corresponds to one first lens unit and one second lens unit, respectively.

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