CN110389419A - Fixed device, light-source system and optical system - Google Patents
Fixed device, light-source system and optical system Download PDFInfo
- Publication number
- CN110389419A CN110389419A CN201810359683.8A CN201810359683A CN110389419A CN 110389419 A CN110389419 A CN 110389419A CN 201810359683 A CN201810359683 A CN 201810359683A CN 110389419 A CN110389419 A CN 110389419A
- Authority
- CN
- China
- Prior art keywords
- eyeglass
- elastic slice
- hole
- accommodating cavity
- fixed device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Lens Barrels (AREA)
- Eyeglasses (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
Abstract
The present invention provides a kind of fixed device, light-source system and optical system, it is described to be used to fix the first eyeglass and the second eyeglass, including the bracket, the first elastic slice and the second elastic slice being cascading, in which: the bracket is provided with accommodating cavity, and the accommodating cavity is for accommodating first eyeglass；First elastic slice offers the first through hole for accommodating second eyeglass；An at least abutting portion is arranged in second elastic slice, and the abutting portion simultaneously flexibly supports on the surface of second eyeglass.Fixed device provided by the invention is capable of fixing first eyeglass and second eyeglass, and realizes and reliably fit closely between first eyeglass and second eyeglass.
Description
Technical field
The present invention relates to optical technical field more particularly to a kind of fixed devices, light-source system and optical system.
Background technique
This part intends to provides background or context for a specific embodiment of the invention stated in claims.This
The description at place recognizes it is the prior art not because not being included in this section.
Currently, in the market 3LCD educate light source of projector in zero distance arrangement optical mirror slip often through single tabletting with
Support is fixed in shell cooperation, and this fixed form does not require nothing more than increasingly complex outer casing stand, while wanting to machining accuracy
It asks also harsher, processes Chen Bengao, and the mode reliability that two eyeglasses only lean on one piece of elastic slice fixed is inadequate, it is possible to create phase
To offset.In addition, there is also a kind of fixed form being fixed by carrying out viscose glue in lens surface, such one side glue exists
Lens surface more or less influences whether a part of optical path, declines light efficiency；Another aspect glue is possible in high temperature light source
There are volatilizations, generate pollution, and the bad disassembly of mode of viscose glue, assembly difficulty to eyeglass.
Summary of the invention
In view of this, the present invention provides a kind of fixation device that can be realized and reliably fit closely between optical mirror slip, this
Invention also provides a kind of light-source system and optical system using the fixed device of the optical mirror slip.
A kind of fixed device, for fixing the first eyeglass and the second eyeglass, including bracket, the first bullet being cascading
Piece and the second elastic slice, in which:
The bracket is provided with accommodating cavity, and the accommodating cavity is for accommodating first eyeglass；
First elastic slice offers the first through hole for accommodating second eyeglass；
Second elastic slice, is provided with an at least abutting portion, and the abutting portion flexibly supports the table in second eyeglass
On face.
Further, second elastic slice further includes the second ontology, is provided with the abutting portion on second ontology,
In, the abutting portion includes:
From second ontology to the extended segment extended far from first elastic slice side；
For contradicting the conflict section of second eyeglass；And
It is connected to the extended segment and the bending segment contradicted between section, is bent along neighbouring first elastic slice side.
Further, the abutting portion is V-shaped.
Further, the second through-hole for accommodating second eyeglass, the conflict are offered on second ontology
Portion is set to the edge of neighbouring second through-hole on second ontology.
Further, the accommodating cavity, the first through hole and second through-hole are mutually communicated.
Further, the central axis of the accommodating cavity, the first through hole and second through-hole is overlapped.
Further, the first through hole is also used to the second eyeglass described in the accommodating cavity radial positioning.
Further, the rack surface is provided with positioning region, and first elastic slice is respectively set with second elastic slice
There is positioning match part, the positioning region and the positioning match part cooperate, to first elastic slice and second elastic slice edge
The accommodating cavity radial positioning.
Further, the positioning region is positioning pin, and the positioning match part is location hole.
Further, it is detachably fixed between the bracket, first elastic slice and second elastic slice by fastener.
Further, the clear aperature of first eyeglass is greater than second eyeglass, and first elastic slice is for covering
The outs open of the accommodating cavity.
Further, the clear aperature of first eyeglass is less than second eyeglass, and the accommodating cavity is along central shaft
The size of line is less than or equal to the axial dimension of first eyeglass.
A kind of light-source system, including fixation device described in the first eyeglass, the second eyeglass and any one as above, wherein
First eyeglass is placed in the accommodating cavity, and second eyeglass is accommodated and is positioned in the first through hole.
Further, first eyeglass is negative lens.
Further, second eyeglass is astigmatic lens.
A kind of optical system, including fixation device described in the first eyeglass, the second eyeglass and any one as above, wherein
First eyeglass is placed in the accommodating cavity, and second eyeglass is accommodated and is positioned in the first through hole.
Fixed device provided by the invention is capable of fixing first eyeglass and second eyeglass, and realizes described first
It is reliably fitted closely between eyeglass and second eyeglass.The fixed device is to first eyeglass and second eyeglass point
The fixed mode of grade is readily disassembled and assembles so that installation is more stable effectively；Using described in the abutting portion elastic compression
One eyeglass and second eyeglass, so that the first eyeglass is fitted closely with the second eyeglass, it is practical.
Detailed description of the invention
In order to illustrate the embodiments of the present invention more clearly/mode technical solution, embodiment/mode will be described below in institute
Attached drawing to be used is needed to be briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention/side
Formula without creative efforts, can also obtain according to these attached drawings for those of ordinary skill in the art
Obtain other attached drawings.
Fig. 1 is the schematic perspective view for the fixation device 100 that embodiment of the present invention provides.
Fig. 2 is the decomposition texture schematic diagram of fixed device 100 shown in FIG. 1.
Fig. 3 is III regional enlarged drawing shown in Fig. 2.
Main element symbol description
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying example, the present invention will be described in detail.It should be noted that in the absence of conflict, embodiments herein and embodiment
In feature can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
Also referring to Fig. 1-Fig. 2, Fig. 1 is the stereochemical structure signal for the fixation device 100 that embodiment of the present invention provides
Figure, Fig. 2 are the decomposition texture schematic diagram of fixed device 100 shown in FIG. 1.Fixed device 100 for fix the first eyeglass 200 with
Second eyeglass 300, including the bracket 110, the first elastic slice 130 and the second elastic slice 150 being cascading.Wherein, bracket 110 is set
It is equipped with accommodating cavity 111, accommodating cavity 111 is for accommodating the first eyeglass 200；First elastic slice 130 is offered for accommodating the second eyeglass
300 first through hole 131；An at least abutting portion 153,153 elasticity of abutting portion are provided on second elastic slice, 150 second elastic slice 150
It supports on the surface of the second eyeglass 300.Wherein, the first eyeglass 200 and the second eyeglass 300 are the light except fixed device 100
Learn eyeglass.
Fixed device 100 provided by the invention is capable of fixing the first eyeglass 200 and the second eyeglass 300, and realizes the first mirror
It is reliably fitted closely between piece 200 and the second eyeglass 300.In embodiment of the present invention, taught with fixing device 100 applied to 3LCD
It is illustrated for educating in light source of projector, wherein the first eyeglass 200 is negative lens, the second eyeglass 300 is astigmatic lens.It can be with
Understand, the fixation device 100 provided in embodiment of the present invention can also be applied to other light sources system or optical system
In, it is not limited thereto.In other embodiments, the first eyeglass 200 and the second eyeglass 300 can be negative lens, astigmatism
Eyeglass, light splitting optical filter or convex lens or the first eyeglass 200 and the second eyeglass 300 are respectively different types of optical mirror slip.
Specifically, the accommodating cavity 111 of bracket 110 is fixed for accommodating the first eyeglass 200, and in the radial direction of accommodating cavity 111
The first eyeglass 200 of position.In present embodiment, the first eyeglass 200 is cylindrical negative lens, the shape of accommodating cavity 111 and the
One eyeglass 200 matches, so that accommodating cavity 111 fixes the first eyeglass 200 described in the radial direction.It is understood that In
In a kind of embodiment, it is provided with fixed part on the bottom wall or side wall of accommodating cavity 111, is preferably set up flexible fixed part,
The fixed part is used to contradict the surface of the first eyeglass 200, so that the first eyeglass 200 is fixed in accommodating cavity 111.
First elastic slice 130 offers the first through hole 131 for accommodating the second eyeglass 300, and first through hole 131 is also used to
111 the second eyeglass of radial positioning 300 of accommodating cavity.In present embodiment, the second eyeglass 300 is the astigmatic lens being square, first
The shape of through-hole 131 is matched with the shape of the second eyeglass 300, it is to be understood that in other embodiments, first through hole
131 may be arranged as and the matched other shapes of the second eyeglass 300.
Second elastic slice 150 further includes the second ontology 155, is offered on the second ontology 155 for accommodating the second eyeglass 300
Second through-hole 151 is additionally provided with abutting portion 153 on second ontology 155.In present embodiment, the second elastic slice 150 is in the second ontology
155 are provided with 4 abutting portions 153 adjacent to the edge of the second through-hole 151.It is understood that can be spaced on the second elastic slice 150
The abutting portion 153 of other quantity is set.In one embodiment, the second elastic slice 150 is in the second ontology 155 adjacent to the second through-hole
151 edge is provided with 1 abutting portion 153, and abutting portion 153 in a ring and is connected to the second ontology 155 adjacent to the second through-hole 151
Edge.
Abutting portion includes: extended segment 153a, bending segment 153b and conflict section 153c.Wherein, extended segment 153a is from second
Body 155 extends to far from 130 side of the first elastic slice；Bending segment 153b is connected to extended segment 153a and contradicts between section 153c, curved
Trisection 153b is bent along neighbouring first elastic slice, 130 side；Section 153c is contradicted for contradicting the second eyeglass 300.In present embodiment,
Abutting portion 153 is V-shaped, it is to be understood that in other embodiments, abutting portion 153 can also be the energy in other shapes
It is enough that the structure for flexibly supporting power is provided.
In a kind of application scenarios, the axial dimension of the second eyeglass 300 is larger, and abutting portion 153 is connected to the second eyeglass 300
When surface, section 153c is contradicted compared to elongated end 153a far from the first elastic slice 130；In a kind of application scenarios, the second eyeglass 300
Axial dimension it is smaller, abutting portion 153 be used for across the second through-hole 151 abut the second eyeglass 300 surface, i.e., conflict section 153c
Compared to elongated end 153a adjacent to the first elastic slice 130.
In one embodiment, accommodating cavity 111, first through hole 131 and the second through-hole 151 are mutually communicated, so that first
Eyeglass 200 and the second eyeglass 300 can be used for guiding light.In a preferred embodiment, accommodating cavity 111, first is logical
The central axis of hole 131 and the second through-hole 151 is overlapped.
Bracket 110 includes ontology 115, is provided with accommodating cavity 111 and positioning region 116 on ontology 115.First elastic slice 130 with
Second elastic slice 150 is respectively arranged with positioning match part 136,156, and positioning region 116 and positioning match part 136,156 cooperate, with right
First elastic slice 130 and the second elastic slice 150 are along 111 radial positioning of accommodating cavity, to avoid the first eyeglass 200 and the second eyeglass 300
It is relatively moved along the radial direction.It is understood that ontology 115 is with the integrated molding of positioning region 116 or ontology 115 and calmly
Position portion 116 detachably cooperates.Specifically, positioning region 116 is positioning pin, and positioning match part 136,156 is location hole.
It is detachable by fastener 170 between bracket 110, the first elastic slice 130 and the second elastic slice 150 in present embodiment
It is fixed, to realize flexibly dismounting.It is understood that bracket 110, the first elastic slice 130 and the second elastic slice 150 can also pass through card
It hooks buckle or other structures detachably cooperates, be not limited thereto.Specifically, bracket 110, the first elastic slice 130 and the second elastic slice
4 fasteners 170 are provided between 150, fastener 170 is screw, correspondingly, bracket 110, the first elastic slice 130 and the second bullet
The corresponding fastener 170 of piece 150 is provided with screw hole, and the screw hole is provided with internal screw thread.It is understood that fastener 170
Quantity and type can be selected according to actual needs.
When the clear aperature of first eyeglass 200 is greater than the second eyeglass 300, the first elastic slice 130 is for covering accommodating cavity 111
Outs open, after fastener 170 assembles, the edge of the first elastic slice 130 is used to compress the surface of the first eyeglass 200, thus
The first eyeglass 200 is fixed in the direction of 111 central axis of accommodating cavity.Since the clear aperature of the first eyeglass 200 is greater than the second mirror
Piece 300, the second eyeglass 300 compress the first eyeglass 200 under the action of abutting portion 153, to realize the first eyeglass 200 and second
It is fitted closely between eyeglass 300.
When the clear aperature of first eyeglass 200 is equal to the second eyeglass 300, the first eyeglass 200 and the second eyeglass 300 mutually patch
The surface of conjunction is completely coincident, and after fastener 170 assembles, the second eyeglass 300 compresses the first mirror under the action of abutting portion 153
Piece 200 fits closely between the first eyeglass 200 and the second eyeglass 300 to realize.
When the clear aperature of first eyeglass 200 is less than the second eyeglass 300, accommodating cavity 111 is small along the size of center axis thereof
In being equal to the first eyeglass 200, so that the second eyeglass 300 can be compressed under the action of abutting portion 153 to the first eyeglass
200, it is fitted closely between the first eyeglass 200 and the second eyeglass 300 to realize.
Fixed device 100, can not be to first without influence on the optical path for passing through the first eyeglass 200 and the second eyeglass 300
Eyeglass 200 and the second eyeglass 300 generate pollution；Fixed device 100 is classified fixation to the first eyeglass 200 and the second eyeglass 300
Mode makes installation more stable effectively, is readily disassembled and assembles；Using 153 the first eyeglass of elastic compression 200 of abutting portion and
Two eyeglasses 300, so that the first eyeglass 200 is fitted closely with the second eyeglass 300；Modular construction in fixed device 100 is simply easy
System, it is low in cost, it is practical.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included in the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.This
Outside, it is clear that one word of " comprising " does not exclude other units or steps, and odd number is not excluded for plural number.That states in device claim is multiple
Device can also be implemented through software or hardware by the same device or system.The first, the second equal words are used to indicate name
Claim, and does not indicate any particular order.
Finally it should be noted that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although reference
Preferred embodiment describes the invention in detail, those skilled in the art should understand that, it can be to of the invention
Technical solution is modified or equivalent replacement, without departing from the spirit and scope of the technical solution of the present invention.
Claims (16)
1. a kind of fixed device, for fixing the first eyeglass and the second eyeglass, which is characterized in that including the branch being cascading
Frame, the first elastic slice and the second elastic slice, in which:
The bracket is provided with accommodating cavity, and the accommodating cavity is for accommodating first eyeglass；
First elastic slice offers the first through hole for accommodating second eyeglass；
Second elastic slice, is provided with an at least abutting portion, and the abutting portion flexibly supports on the surface of second eyeglass.
2. fixed device as described in claim 1, which is characterized in that second elastic slice further includes the second ontology, and described the
The abutting portion is provided on two ontologies, wherein the abutting portion includes:
From second ontology to the extended segment extended far from first elastic slice side；
For contradicting the conflict section of second eyeglass；And
It is connected to the extended segment and the bending segment contradicted between section, is bent along neighbouring first elastic slice side.
3. fixed device as claimed in claim 2, which is characterized in that the abutting portion is V-shaped.
4. fixed device as claimed in claim 2, which is characterized in that offered on second ontology for accommodating described the
Second through-hole of two eyeglasses, the abutting portion are set to the edge of neighbouring second through-hole on second ontology.
5. fixed device as claimed in claim 4, which is characterized in that the accommodating cavity, the first through hole and described second
Through-hole is mutually communicated.
6. fixed device as claimed in claim 5, which is characterized in that the accommodating cavity, the first through hole and described second
The central axis of through-hole is overlapped.
7. fixed device as described in claim 1, which is characterized in that the first through hole is also used to radial in the accommodating cavity
Position second eyeglass.
8. fixed device as described in claim 1, which is characterized in that the rack surface is provided with positioning region, and described first
Elastic slice and second elastic slice are respectively arranged with positioning match part, and the positioning region and the positioning match part cooperate, to institute
The first elastic slice and second elastic slice are stated along the accommodating cavity radial positioning.
9. fixed device as claimed in claim 8, which is characterized in that the positioning region is positioning pin, the positioning match part
For location hole.
10. fixed device as described in claim 1, which is characterized in that the bracket, first elastic slice and second bullet
It is detachably fixed between piece by fastener.
11. the fixation device as described in claim 1-10 any one, which is characterized in that the clear aperature of first eyeglass
Greater than second eyeglass, first elastic slice is used to cover the outs open of the accommodating cavity.
12. the fixation device as described in claim 1-10 any one, which is characterized in that the clear aperature of first eyeglass
Less than second eyeglass, the accommodating cavity is less than or equal to the axial dimension of first eyeglass along the size of center axis thereof.
13. a kind of light-source system, which is characterized in that including the first eyeglass, the second eyeglass and such as claim 1-12 any one
The fixation device, wherein first eyeglass is placed in the accommodating cavity, and second eyeglass accommodates and is positioned at institute
It states in first through hole.
14. light-source system as claimed in claim 13, which is characterized in that first eyeglass is negative lens.
15. light-source system as claimed in claim 13, which is characterized in that second eyeglass is astigmatic lens.
16. a kind of optical system, which is characterized in that including the first eyeglass, the second eyeglass and such as claim 1-12 any one
The fixation device, wherein first eyeglass is placed in the accommodating cavity, and second eyeglass accommodates and is positioned at institute
It states in first through hole.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810359683.8A CN110389419B (en) | 2018-04-20 | 2018-04-20 | Fixing device, light source system and optical system |
| PCT/CN2019/070534 WO2019200981A1 (en) | 2018-04-20 | 2019-01-05 | Fixing device, light source system, and optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810359683.8A CN110389419B (en) | 2018-04-20 | 2018-04-20 | Fixing device, light source system and optical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110389419A true CN110389419A (en) | 2019-10-29 |
| CN110389419B CN110389419B (en) | 2022-04-22 |
Family
ID=68240520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810359683.8A Active CN110389419B (en) | 2018-04-20 | 2018-04-20 | Fixing device, light source system and optical system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110389419B (en) |
| WO (1) | WO2019200981A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114859635A (en) * | 2022-05-16 | 2022-08-05 | 歌尔光学科技有限公司 | Optical projection equipment |
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| US6922293B2 (en) * | 2002-07-02 | 2005-07-26 | Nikon Corporation | Kinematic optical mounting assembly with flexures |
| CN101907833A (en) * | 2010-08-03 | 2010-12-08 | 中国科学院长春光学精密机械与物理研究所 | Optical element gravity deformation draught head compensating device in projection objective system and method thereof |
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| CN106443936A (en) * | 2016-10-09 | 2017-02-22 | 中国科学院长春光学精密机械与物理研究所 | Five-freedom-degree final motion adjusting mechanism for optical element |
| CN206191514U (en) * | 2016-11-25 | 2017-05-24 | 华格照明灯具（上海）有限公司 | Conveniently change structure and LED lamps and lanterns of lens |
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| DE102009047489B4 (en) * | 2009-12-04 | 2013-07-11 | Osram Gmbh | light module |
| US20160109680A1 (en) * | 2014-10-17 | 2016-04-21 | Lg Innotek Co., Ltd. | Lens Moving Apparatus |
| CN205720821U (en) * | 2016-03-24 | 2016-11-23 | 深圳市光峰光电技术有限公司 | Optical element holding device and optical device |
| CN206002745U (en) * | 2016-08-26 | 2017-03-08 | 武汉华工激光工程有限责任公司 | It is applied to the Compliant pressure structure of optical mirror slip |
| CN206930816U (en) * | 2017-06-15 | 2018-01-26 | 深圳市光峰光电技术有限公司 | Lens module, light-source system and projection arrangement |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114859635A (en) * | 2022-05-16 | 2022-08-05 | 歌尔光学科技有限公司 | Optical projection equipment |
| CN114859635B (en) * | 2022-05-16 | 2024-04-26 | 歌尔光学科技有限公司 | Optical projection equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019200981A1 (en) | 2019-10-24 |
| CN110389419B (en) | 2022-04-22 |
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