CN211698452U - Optical device - Google Patents
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- CN211698452U CN211698452U CN201922086197.6U CN201922086197U CN211698452U CN 211698452 U CN211698452 U CN 211698452U CN 201922086197 U CN201922086197 U CN 201922086197U CN 211698452 U CN211698452 U CN 211698452U
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- laser
- collimating mirror
- optical device
- circuit board
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Abstract
The utility model discloses an optical device, optical device includes: the laser comprises a collimating mirror, a diffractive optical element, a circuit board and a laser, wherein the collimating mirror is provided with an incident side and an emergent side, the incident side and the emergent side are positioned on two opposite sides of the collimating mirror, the diffractive optical element is arranged on the emergent side of the collimating mirror, the circuit board is arranged on the incident side of the collimating mirror, and the laser is arranged on the circuit board and deviates from a focal plane of the collimating mirror so as to form surface type light through the diffractive optical element. The laser is arranged on the circuit board and deviates from the focal plane of the collimating mirror, so that the laser emitted from the diffractive optical element can form fuzzy spots in an imaging area, and then a large-scale surface-shaped light can be formed after the laser is seamlessly connected with the fuzzy spots, so that the diffracted light effect is more uniform, and the window efficiency is higher.
Description
Technical Field
The utility model belongs to the technical field of optics and specifically relates to an optical device is related to.
Background
The vertical cavity surface emitting laser of the optical device is provided with hundreds of light emitting holes, each laser hole emits a point of light source which is collimated into parallel light by the collimating lens and then enters the diffraction optical element, and the diffraction optical element diffracts the light rays, so that a plurality of groups of light spot arrangements on the vertical cavity surface emitting laser are reproduced and projected onto an object.
In the related art, the resolution of speckle projected by an optical device depends on the collimation effect of a collimating mirror, and if the performance of the optical device is to be improved, the collimation effect of the collimating mirror must be improved, but the collimating mirror with high collimation effect is not easy to obtain, and the production cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an optical device becomes fuzzy spot through the laser spot that diffracts out with the diffraction optical element to form the face type light with the laser spot seamless adjacent.
According to the utility model discloses optical device, include: collimating mirror, diffraction optical element, Circuit Board (Printed Circuit Board) and laser instrument, the collimating mirror has incident side, outgoing side and focal plane, the incident side with the outgoing side is located the relative both sides of collimating mirror, diffraction optical element set up in the outgoing side of collimating mirror, the Circuit Board set up in the incident side of collimating mirror, the laser instrument set up in on the Circuit Board and skew the focal plane of collimating mirror is in order to pass through diffraction optical element forms the face type light.
According to the utility model discloses an optical device, through set up the laser instrument on the circuit board and skew collimating mirror's focal plane, can make the laser from diffraction optical element outgoing form into fuzzy spot in the formation of image region, will form a large-scale face type light after rethread seamless linkage between a plurality of fuzzy spots to can make the light efficiency of diffraction play more even, window efficiency is higher.
According to some embodiments of the present invention, in the collimator optical axis direction, the laser is relative the focal plane is closer to the collimator setting. In this way, a diffusion effect occurs at close range.
According to some embodiments of the present invention, in the collimator optical axis direction, the laser is relative the focal plane is further away from the collimator setting. In this way, a diffusion effect occurs at the perspective.
According to some embodiments of the utility model, still include the regulating part, the regulating part sets up the circuit board orientation a side surface of collimating mirror, the laser set up in on the regulating part. In this arrangement, the laser can be shifted from the focal plane of the collimator, and the laser beam can be converted into non-parallel light after being emitted from the collimator lens.
According to some embodiments of the present invention, the adjusting member has a bottom plane and a side slope disposed adjacent to the bottom plane and at an acute angle, the bottom plane being disposed on a surface of the circuit board; the number of regulating parts is two, two the side inclined plane of regulating part sets up relatively, the both ends of laser instrument are set up in two the side inclined plane. By arranging the adjustment member in a wedge shape, the extent to which the laser deviates from the focal plane of the collimator can be adjusted.
According to some embodiments of the invention, the adjusting member is movably mounted on the circuit board, so that the two side inclined planes can approach and depart from each other relatively. That is, the exit light after passing through the collimator lens when the laser and the circuit board are out of the focal depth range is non-parallel light, so that the laser light is formed as a blurred spot in the imaging region.
According to some embodiments of the invention, the laser is a vertical cavity surface emitting laser. The laser emitted by the vertical cavity surface emitting laser is vertical to the circuit board, and the generated laser beam has a lower divergence angle, so that the performance of the optical device can be improved.
According to some embodiments of the invention, the collimating mirror comprises a plurality of lenses, a plurality of the lenses are arranged in a stack in sequence. The plurality of lenses are sequentially stacked, so that laser light emitted by the laser on the focal plane of the collimating mirror is changed into parallel light after passing through the collimating mirror.
According to some embodiments of the invention, the optical axis of the collimating mirror passes through the center of the laser. The optical axis of the collimating mirror penetrates through the center of the laser, so that the laser passing through the collimating mirror does not generate a double refraction phenomenon, and the performance of the optical device is improved.
According to some embodiments of the invention, the optical device further comprises: a housing, the collimating mirror, the diffractive optical element, the circuit board, and the laser being disposed within the housing. The optical device is provided with a shell which can protect the elements in the optical device.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an optical device according to an embodiment of an aspect of the present invention;
FIG. 2 is a schematic diagram of an optical device according to another aspect of the present invention;
fig. 3 is a schematic structural diagram of an adjusting member according to an embodiment of the present invention.
Reference numerals:
100: an optical device;
10: a circuit board;
20: a vertical cavity surface emitting laser;
30: a collimating mirror; 31: an incident side; 32: an exit side; 33: a lens;
40: a diffractive optical element;
50: an adjustment member; 51: a side bevel; 52: a bottom plane.
Detailed Description
Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.
An optical device 100 according to an embodiment of the present invention is described below with reference to fig. 1-3.
As shown in fig. 1, the optical apparatus 100 includes: the laser device comprises a collimating mirror 30, a diffractive optical element 40, a circuit board 10 and a laser 20, wherein the collimating mirror 30 is provided with an incident side 31, an emergent side 32 and a focal plane, the incident side 31 and the emergent side 32 are positioned at two opposite sides of the collimating mirror 30, the diffractive optical element 40 is arranged at the emergent side 32 of the collimating mirror 30, laser emitted from the collimating mirror 30 can be shaped by the diffractive optical element 40, so that laser spots emitted from the emergent side 32 of the collimating mirror 30 can be seamlessly jointed, the circuit board 10 is arranged at the incident side 31 of the collimating mirror 30, the laser 20 is arranged on the circuit board 10, the circuit board 10 can control the work of the laser 20, the laser 20 deviates from the focal plane of the collimating mirror 30, the laser emitted from the laser 20 enters the collimating mirror 30 through the incident side 31 of the collimating mirror 30, and the laser emitted from the laser 20 deviating from the focal plane of the collimating mirror 30 forms non-parallel fuzzy spots after passing through the collimating mirror 30, and then, the plurality of fuzzy spots are shaped by the diffractive optical element 40 to form surface light in a seamless connection mode, so that the diffracted light effect is more uniform, and the window efficiency is higher.
Therefore, the laser 20 is arranged on the circuit board 10 and deviates from the focal plane of the collimating mirror 30, so that the laser emitted from the diffractive optical element 40 can be formed into fuzzy spots in the imaging area, and then a large-scale surface-type light can be formed after the fuzzy spots are seamlessly connected, so that the light efficiency of the diffraction can be more uniform, and the window efficiency is higher.
According to the utility model discloses an embodiment, on collimating mirror 30 optical axis direction, laser instrument 20 is closer to collimating mirror 30 setting than the focal plane, that is to say, laser instrument 20 is skew towards collimating mirror 30 direction, and is skew through the direction with laser instrument 20 towards collimating mirror 30, makes optical device 100 appear the diffusion effect in close-range view department to make laser can produce the fuzzy spot in close-range view department, and then can make optical device 100 produce the face type light.
According to the utility model discloses a further embodiment, on collimating mirror 30 optical axis direction, laser instrument 20 is farther away from collimating mirror 30 setting than the focal plane, that is to say, laser instrument 20 keeps away from collimating mirror 30 direction skew, and through keeping away from the direction skew of collimating mirror 30 with laser instrument 20, makes optical device 100 appear the diffusion effect in long shot department to make laser can produce the fuzzy spot in long shot department, and then can make optical device 100 produce the face type light.
As shown in fig. 2, the optical device 100 further includes an adjusting member 50, the adjusting member 50 is disposed on a surface of the circuit board 10 facing the collimating mirror 30, and the laser 20 is disposed on the adjusting member 50, so that the laser 20 deviates from a focal plane of the collimating mirror 30. The adjustment tool 50 can shift the laser 20 from the focal plane of the collimator 30, so that the laser beam emitted from the collimator 30 becomes non-parallel light, and the laser beam emitted from the emitting side 32 of the collimator 30 is formed into a blurred spot.
Specifically, as shown in fig. 3, the adjusting member 50 has a bottom plane 52 facing the circuit board 10 and a side inclined plane 51 adjacent to the bottom plane 52 and disposed at an acute angle, the bottom plane 52 being a surface disposed on the circuit board 10; the number of the adjusting pieces 50 is two, the side inclined surfaces 51 of the two adjusting pieces 50 are arranged oppositely, and both ends of the laser 20 are overlapped on the two side inclined surfaces 51. By arranging the adjusting members 50 in a wedge shape, when the two adjusting members 50 slide relatively on the circuit board 10, that is, when the two bottom planes 52 slide on the circuit board 10, the distance between the two side inclined planes 51 changes, so that the laser 20 is controlled to move in the up-down direction, and the range of the laser 20 deviating from the focal plane of the collimator 30 can be adjusted. For example, when the two adjusting members 50 move toward each other, the distance between the two side slopes 51 decreases, and the distance between the laser 20 and the collimator 30 decreases; when the two adjusting members 50 move away from each other, the distance between the two side slopes 51 increases, and the distance between the laser 20 and the collimator 30 increases. Therefore, the adjusting part 50 can adjust the range of the laser 20 deviating from the focal plane of the collimator 30, so that the optical device 100 can be controlled by changing the range of the laser 20 deviating from the focal plane of the collimator 30, and the performance of the optical device 100 can be improved.
Also, the adjusting member 50 is movably mounted on the circuit board 10 such that the two side inclined surfaces 51 can move toward and away from each other. Specifically, when the laser 20 and the circuit board 10 are deviated, if the deviation is in the direction of the collimator lens 30, the deviation is stopped when the dispersion (diffusion) occurs at the near view, and if the deviation is in the direction away from the collimator lens 30, the deviation is stopped when the dispersion occurs at the far view. By locating the laser 20 and the circuit board 10 outside the focal depth range, the laser emitted from the emergent side 32 of the collimating mirror 30 can be formed into fuzzy spots, and then the fuzzy spots are shaped by the diffractive optical element 40, so that a plurality of fuzzy spots are seamlessly connected to form surface light, and the light effect of the diffraction can be more uniform, and the window efficiency is higher.
Alternatively, the laser 20 may be a vertical cavity surface emitting laser, laser light emitted by the vertical cavity surface emitting laser is emitted perpendicularly to the circuit board 10, and the generated laser beam has a lower divergence angle, which not only reduces the loss of laser energy, but also improves the performance of the optical apparatus 100.
Specifically, the collimator lens 30 may include a plurality of lenses 33, the plurality of lenses 33 may be sequentially stacked, and the plurality of lenses 33 may be sequentially stacked such that the laser light emitted from the laser 20 on the focal plane of the collimator lens 30 becomes parallel light after passing through the collimator lens 30.
In addition, the optical axis of the collimating mirror 30 passes through the center of the laser 20, and light rays can generate a birefringence phenomenon when passing through the lens 33 without passing through the optical axis, and the birefringence phenomenon has a great influence on the performance of the optical device 100, and the laser light passing through the collimating mirror 30 can not generate the birefringence phenomenon by passing the optical axis of the collimating mirror 30 through the center of the laser 20, so that the performance of the optical device 100 is improved.
Wherein, the optical device 100 further comprises: the collimating mirror 30, the diffractive optical element 40, the circuit board 10 and the laser 20 in the optical device 100 are protected from being damaged by the housing, the collimating mirror 30, the diffractive optical element 40, the circuit board 10 and the laser 20 in the optical device 100 are protected by the housing, and the components in the optical device 100 can be separated from the outside of the optical device 100 by the housing, so that the influence of the external environment of the optical device 100 on the optical device 100 is reduced, and the performance and the service life of the optical device 100 are improved.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. An optical device, comprising:
the collimating mirror is provided with an incident side and an emergent side, and the incident side and the emergent side are positioned at two opposite sides of the collimating mirror;
a diffractive optical element disposed on an exit side of the collimator lens;
the circuit board is arranged on the incident side of the collimating mirror;
a laser disposed on the circuit board and offset from a focal plane of the collimating mirror to form surface-type light through the diffractive optical element;
wherein, in the optical axis direction of the collimating mirror, the laser is arranged closer to the collimating mirror relative to the focal plane;
or, in the optical axis direction of the collimating mirror, the laser is disposed farther from the collimating mirror relative to the focal plane.
2. The optical device of claim 1, further comprising an adjustment member disposed on a side surface of the circuit board facing the collimating mirror, the laser being disposed on the adjustment member such that the laser is offset from a focal plane of the collimating mirror.
3. The optical device according to claim 2, wherein the adjusting member has a bottom plane and a side slope disposed at an acute angle adjacent to the bottom plane, the bottom plane being a surface of the circuit board; the number of regulating parts is two, two the side inclined plane of regulating part sets up relatively, the both ends of laser instrument are set up in two the side inclined plane.
4. The optical device of claim 3, wherein said adjustment member is movably mounted to said circuit board such that said two side inclined surfaces can move toward and away from each other.
5. The optical device according to any of claims 1-4, wherein the laser is a vertical cavity surface emitting laser.
6. The optical device according to any one of claims 1 to 4, wherein the collimating mirror comprises a plurality of lenses, the plurality of lenses being arranged in a stack in sequence.
7. The optical device according to any of claims 1-4, wherein the optical axis of the collimating mirror passes through the center of the laser.
8. The optical device of any one of claims 1-4, further comprising: a housing, the collimating mirror, the diffractive optical element, the circuit board, and the laser being disposed within the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922086197.6U CN211698452U (en) | 2019-11-27 | 2019-11-27 | Optical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922086197.6U CN211698452U (en) | 2019-11-27 | 2019-11-27 | Optical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211698452U true CN211698452U (en) | 2020-10-16 |
Family
ID=72788565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922086197.6U Expired - Fee Related CN211698452U (en) | 2019-11-27 | 2019-11-27 | Optical device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211698452U (en) |
-
2019
- 2019-11-27 CN CN201922086197.6U patent/CN211698452U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 330013 east of Xueyuan 6th Road, south of Tianxiang Avenue, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province Patentee after: OFilm Microelectronics Technology Co.,Ltd. Address before: 330000, No. 1189, Jingdong Avenue, high tech Zone, Nanchang City, Jiangxi Province Patentee before: NANCHANG OFILM BIO-IDENTIFICATION TECHNOLOGY Co.,Ltd. Address after: 330013 No.699 Tianxiang North Avenue, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province Patentee after: Jiangxi OMS Microelectronics Co.,Ltd. Address before: 330013 east of Xueyuan 6th Road, south of Tianxiang Avenue, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province Patentee before: OFilm Microelectronics Technology Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201016 Termination date: 20211127 |