CN108363267A - The structured light projection module of regular array light source - Google Patents
The structured light projection module of regular array light source Download PDFInfo
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- CN108363267A CN108363267A CN201810151732.9A CN201810151732A CN108363267A CN 108363267 A CN108363267 A CN 108363267A CN 201810151732 A CN201810151732 A CN 201810151732A CN 108363267 A CN108363267 A CN 108363267A
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- 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
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2013—Plural light sources
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- 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
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/48—Details of cameras or camera bodies; Accessories therefor adapted for combination with other photographic or optical apparatus
- G03B17/54—Details of cameras or camera bodies; Accessories therefor adapted for combination with other photographic or optical apparatus with projector
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- 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
- G03B21/206—Control of light source other than position or intensity
Abstract
The present invention provides a kind of structured light projection module of regular array light source, including：Array of source includes at least two sub-light sources arranged with rule format；Lens, for collimating or focusing the light beam emitted by the sub-light source；Diffraction optical element emits sub- speckle patterns light beam outward after receiving the light beam for the sub-light source being emitted by the lens, and at least two sub- speckle patterns light beam assembled arrangements that at least two sub-light source is formed are at structure light speckle patterns light beam；Wherein, the assembled arrangement form of the described at least two sub- speckle patterns light beams is corresponding with the spread pattern of at least two sub-light sources described in the array of source.Sub-light source in its array of source is regularly arranged, diffraction optical element forms irregular pattern, that is, sub- speckle patterns to the light beam of single sub-light source, the sub- speckle patterns that all sub-light sources are formed constitute structure light speckle patterns, and rational design through the invention ensures that the drop shadow effect of projection module reduces cost again.
Description
Technical field
The present invention relates to electronics and optical component manufacturing fields more particularly to a kind of structure light of regular array light source to throw
Shadow module.
Background technology
The depth information that structure light depth camera can obtain target realizes 3D scannings, scene modeling, gesture interaction whereby,
Compared with the RGB camera being widely used at present, depth camera is just gradually paid attention to by all trades and professions.Such as utilize depth phase
Machine and TV, computer etc. combine and somatic sensation television game may be implemented to achieve the effect that game and body-building is two-in-one, the KINECT of Microsoft, Austria
The ASTRA of light is representative therein than in.In addition, the tango projects of Google are dedicated to bringing depth camera into mobile device, such as
Tablet, mobile phone bring the usage experience overturned completely with this, for example very true AR game experiencings may be implemented, and can make
The functions such as indoor map establishment, navigation are carried out with it.
Core component in structure light depth camera is that it projects module, and according to the difference of depth camera type, laser is thrown
The structure of shadow module is also had any different with function, for example the projection module disclosed in patent CN201610977172A is used for sky
Between middle projection speckle pattern to realize structure light depth survey, this pattern optical depth camera be also it is more mature at present and
Widely used scheme.For speckle, maximum feature is exactly the irrelevance of its height, that is, needs to generate random dissipate
Spot generally realizes the projection of pattern light in existing structure light depth camera using two schemes.One is uses
Single light source (edge-emitting laser) plus diffraction optical element (DOE)；Another kind is using multiple light courcess (VCSEL array) plus DOE
Combination.Latter has the characteristics that power is high, small will gradually replace former scheme due to light source itself.Vertical cavity surface
Laser emitter (VCSEL) array chip is gradually used in multiple fields, such as floodlighting, structured light projection etc..It is tying
In structure optical depth camera, the projection module being made of VCSEL array chip is influence depth image quality and depth camera body
It accumulates to the mostly important factor of miniaturization.On VCSEL array chip the arrangement mode of each VCSEL sub-light sources to close weight
It wants, irregular alignment is considered as generating the necessary arrangement mode of structure light speckle patterns, however irregular alignment increases
The design and production difficulty and cost of VCSEL array chip.
Invention content
The present invention is in order to solve to make array chip not advise to realize the irrelevance of structured light patterns in the prior art
The problem of then arranging the design brought and production difficulty and cost provides a kind of structured light projection mould of regular array light source
Group.
To solve the above-mentioned problems, the technical solution adopted by the present invention is as described below：
A kind of structured light projection module of regular array light source, including：Array of source, include with rule format arrange to
Few two sub-light sources；Lens, for collimating or focusing the light beam emitted by the sub-light source；Diffraction optical element is received by institute
Emit sub- speckle patterns light beam outward after stating the light beam of the sub-light source of lens outgoing, at least two sub-light source is formed extremely
Few two sub- speckle patterns light beam assembled arrangements are at structure light speckle patterns light beam；Wherein, at least two institute
State the spread pattern of the assembled arrangement form and at least two sub-light sources described in the array of source of sub- speckle patterns light beam
It is corresponding.
In an embodiment of the present invention, spot is arranged as irregular alignment in the sub- speckle patterns light beam；
The sub- speckle patterns overlapping adjoins each other；The sub-light source includes edge-emitting laser or vertical cavity surface Laser emission
Device；The array of source further includes substrate, and at least two sub-light source is arranged over the substrate with rule format；Along first
The adjacent sub-light source just set up misplaces in the second direction vertical with the first direction；The adjacent sub-light source enters
The difference being mapped between the beam incident angle on the diffraction optical element is equal with the angle of diffraction of the diffraction optical element.
In an embodiment of the present invention, the lens are microlens arrays, the lenticule in the microlens array
Unit is corresponded with the sub-light source in the array of source and the center at the center and the sub-light source of the lenticule unit
Not on a horizontal line.
The present invention also provides a kind of depth cameras, including：As above any structured light projection module, is used for space
In project structure light speckle patterns；Module is acquired, for acquiring the structure light speckle patterns in object space；Processing
Device receives the structured light patterns and the depth image of object space is calculated；The acquisition module is using Rolling shutter
Mode acquires the structure light speckle patterns, and the sub-light source in the projection module is configured to synchronous with the Rolling shutter
Mode sequentially opens and closes.
Beneficial effects of the present invention are：A kind of structured light projection module of regular array light source is provided, in array of source
Sub-light source be regularly arranged, diffraction optical element forms irregular pattern, that is, sub- speckle patterns to the light beam of single sub-light source,
The sub- speckle patterns that all sub-light sources are formed constitute structure light speckle patterns, and rational design through the invention ensures projection
The drop shadow effect of module reduces cost again.
Description of the drawings
Fig. 1 is structure light depth camera side schematic view according to an embodiment of the invention.
Fig. 2 is the side view of projection module according to an embodiment of the invention.
Fig. 3 is the projection module schematic diagram being made of according to an embodiment of the present invention VCSEL array.
Fig. 4 is array of source according to an embodiment of the invention and structure light speckle patterns schematic diagram.
Fig. 5 is the array of source chip schematic diagram according to another embodiment of the invention.
Fig. 6 is structure light speckle patterns schematic diagram according to an embodiment of the invention.
Wherein, 10- structure lights depth camera, 101- project module, and 102- acquires module, 103- processors, 104-RGB phases
Machine, 105- mainboards, 106- output interfaces, 201- light sources, 202- lens, 203- diffraction optical elements, 204- speckle patterns light
Beam, 205- speckle patterns light beams, 206- speckle patterns light beams, 301- semiconductor substrates, 302- vertical cavity surface Laser emissions
Device array, 401- semiconductor substrates, 402- sub-light sources, the sub- speckle patterns of 403-, 60- structure light speckle patterns, 601~609-
Speckle patterns.
Specific implementation mode
The present invention is described in detail by specific embodiment below in conjunction with the accompanying drawings, for a better understanding of this hair
It is bright, but following embodiments are not intended to limit the scope of the invention.In addition, it is necessary to illustrate, the diagram provided in following embodiments
Only illustrate the basic conception of the present invention in a schematic way, is only shown in attached drawing with related component in the present invention rather than according to reality
Component count, shape when implementation and size are drawn, when actual implementation each component shape, quantity and ratio can be it is a kind of with
The change of meaning, and its assembly layout form may also be increasingly complex.
The present invention proposes a kind of structured light projection module of regular array light source.It will be with depth camera in explanation below
Projection module for illustrate, but be not meant to that this scheme is only capable of applying in depth camera, any other device
In every direct or indirect be intended to be included in protection scope of the present invention using the program.
Shown in FIG. 1 is structure light depth camera side schematic view according to an embodiment of the invention.Structure optical depth
10 main building block of camera has projection module 101, acquisition module 102, mainboard 105 and processor 103, in some depth phases
RGB camera 104 etc. is further provided in machine.Projection module 101, acquisition module 102 and RGB camera 104 are generally mounted at together
In one depth camera plane, and it is in same baseline, each module or camera correspond to a light portal and (do not marked in figure
Go out).Usually, processor 103 is integrated on mainboard 105, and projects module 101 and collection model 102 by interface (in figure
Do not mark) it is connect with mainboard 105, the interface is FPC interfaces in one embodiment.Module 101 is projected to be used for target
Encoded structured light patterns light beam is projected in space, acquisition module 102 passes through processor after collecting the structured light patterns
103 calculate to obtain the depth image of object space.Processor 103 includes also output interface 106, as USB interface, MIPI connect
Mouthful etc., for infrared image, depth image, RGB image etc. to be output to other equipment.
It includes light source and optical element to project module 101 mainly, and light source can include such as LED, laser light source, be used for
Emit visible light and the black lights such as infrared, ultraviolet.Optical element such as lens, diffraction optical element, speculum etc., for pair
The light beam that light source is sent out is modulated, to be projected out structured light patterns light beam outward.Structured light patterns light beam mentioned here refers to
Be that the pattern beam projects and will form the pattern on space plane.It acquires module 102 and projects the often a pair of module 101
It answers, the visual field of projection module 101 generally requires the visual field of the covering acquisition module 102 in measurement range, on the other hand, acquisition mould
Group 102 generally requires setting and projects the corresponding optical filter of 101 beam emitted wavelength of module, in order to allow more structures
The light of light pattern light beam is by the way that reducing other wavelength light beams passes through caused picture noise simultaneously.
In one embodiment, structured light patterns are infrared speckle pattern (infrared speckle patterns), and pattern is with particle point
Cloth is relatively uniform but there is very high local irrelevance, local irrelevance here to refer to that each sub-regions are all in pattern
With higher uniqueness, it is corresponding infrared camera to acquire module 102 at this time.Structured light patterns can also be striped, two dimension
The other forms such as pattern.Then depth image is obtained in particular to receiving by the collected structure of acquisition module using processor
After light pattern, that is, speckle pattern, depth is further obtained by calculating the deviation value between speckle pattern and reference speckle pattern
Image.
Fig. 2 is the side view of projection module according to an embodiment of the invention.The projection module 101 includes by multiple light
Array of source, lens 202 and the diffraction optical element (DOE) 203 that source 201 forms.Light source 201 launches divergent beams, thoroughly
Mirror 202 is incident on diffraction optical element 203 after collimating or focus after receiving divergent beams, and diffraction optical element 203 is by incident light
To spatial emission speckle patterns light beam after beam beam splitting, speckle patterns will be formed in the plane of certain distance.It is appreciated that
It is that lens 202 here can also include diffraction optical element, i.e., realize collimation or focusing function by diffraction optical element,
Lens 202 and DOE203 can be discrete optical element can also be fabricated on the same optical element, such as transparent
Lens and DOE are produced respectively in two surfaces of substrate.
In Fig. 2 for clarity, it is only illustrated by taking the light source 201 of 3 one dimensional arrangements as an example, it can essentially be by other
The arrangement mode of the light source of quantity, light source can also be two-dimensional arrangements, three-dimensional arrangement.What 3 regularly arranged light sources 201 were sent out
Light beam is via 3 corresponding sub- speckle patterns light beams 204,205 and 206 of formation, each height after lens 202 and DOE203
The arrangement mode of speckle patterns light beam is consistent with the arrangement mode of light source 201, and sub- speckle patterns light beam is incident in plane
Collectively constitute the structure light speckle patterns of the projection module 101.
Light source may include being used to emit the light beam such as infrared, ultraviolet equiwavelength by LED, laser etc., in some embodiments
In, the array of edge-emitting laser composition may be used, for emitting infrared light, such as the light beam of 850nm or 940nm wavelength.With
The trend of device miniaturization, in some embodiments, light source may be used by vertical cavity surface laser emitter (VCSEL) institute group
At array, as shown in figure 3, array of source includes semiconductor substrate 301 and setting VCSEL302 on a semiconductor substrate
The array formed, it is possible thereby to reduce the volume of light source.In some embodiments, semiconductor substrate 301 is also used for providing and dissipate
The effects that heat, electrical connection, such as the pedestal that is collectively constituted by radiating piece, circuit board.Since vertical cavity surface laser emitter possesses
The smaller angle of divergence, wavelength with temperature variation are more stable, and VCSEL is since it is surface launching characteristic, volume smaller, these
Characteristic makes VCSEL array light source is more advantageous to be used in projection module.In some embodiments, VCSEL array is whole
Size is arranged tens even a light sources up to a hundred above only in micron dimension, such as 5mmX5mm sizes, between each light source
Distance be in micron dimension, such as 10 μm.
Fig. 4 is array of source according to an embodiment of the invention and structure light speckle patterns schematic diagram.The left sides Fig. 4 show
Example property provides a kind of array of source schematic diagram, and array of source includes semiconductor substrate 401 and regularly arranged sub-light source 402,
Each sub-light source 402 via forming a sub- speckle patterns 403 after lens and diffraction optical element, in VCSEL array by
It is regularly arranged in sub-light source 402, the arrangement mode of sub- speckle patterns 403 is consistent with the arrangement mode of sub-light source 402, therefore same
Sample is regularly arranged.Mentioned here can be unanimously identical, mirror image, symmetrical etc..In the present embodiment, sub-light source 402 forms
The regular array of 3X3, the structure light speckle patterns formed equally contain 3X3 sub- speckle patterns 403, in order to enable knot
Structure hot spot dot pattern is relatively uniform, and in the present embodiment, adjacent sub- speckle patterns 403 adjoin each other, finally formed structure
Hot spot dot pattern does not almost see having apparent gap or overlapping (quadrangle only makees exemplary illustration in figure, in actual pattern
And do not include).In order to reach this purpose, considered in light source arrangement and the design of DOE.Such as Fig. 2 institutes
Show, in one embodiment, the difference between the incidence angle that the light beam that adjacent sub-light source 201 emits is incident on DOE203
α be arranged to it is almost equal with the angle of diffraction β of DOE203, it is possible thereby to realize the sub- speckle patterns phase of adjacent sub-light source institute diffraction
It is mutually adjacent to form structure light speckle patterns.The trend of light beam is exemplarily only given in Fig. 2, actually sub-light source emits
Light beam is divergent beams, and the centerline average of divergent beams is in the horizontal direction, i.e., vertical with the surface of DOE203, via lens
202 form collimation or deviation often also occurs for nearly collimated light beam, center line so that have different to enter when being incident on DOE203
Firing angle degree schematically draws deviation only for example in figure before the light beam of light source transmitting does not enter lens 202.When
So, it can also be realized by being placed so that the light beam of its transmitting has a certain degree with trunnion axis shape to light source 201, than
It is microlens array that lens unit, which is such as arranged, and microlens array is made of multiple lenticule units, the quantity of lenticule unit with
The quantity of sub-light source is identical in array of source and is in one-to-one relationship, i.e., micro- in the corresponding setting one of each sub-light source
Lens, when the center of lenticule and the center of sub-light source be not on a horizontal line, so that it may to achieve the purpose that deviation light beam.
It is understood that the array of source being made of light sources such as such as edge-emitting lasers can also by it is regularly arranged come
Realize structured light patterns illumination.
In some embodiments, in order to improve the density of structure light speckle patterns, sub- speckle patterns can also pass through overlapping
Mode realizes, for example sub- speckle patterns adjacent in the horizontal direction overlapped, and the region of overlapping is sub- speckle patterns
Half, it is possible thereby to generate the relatively uniform overlapping spots pattern of spot arranging density.
In order to obtain the structure light speckle patterns with uncorrelated characteristic (randomness), sub-light source passes through lens and DOE
Irregular alignment of the arrangement with randomness of spot, that is, form uncorrelated sub- speckle patterns in the sub- speckle patterns formed afterwards,
As shown in Fig. 4 neutrons speckle patterns 403.In the prior art such as patent application CN201310051693.2, sub-light source is arranged as
Irregular alignment, and DOE is to replicate array of source with rule format to form structure light speckle patterns, and in the present invention
Middle sub-light source is irregular sub- speckle patterns regularly arranged, that single source is formed by DOE, sub- speckle patterns with sub-light
It is regularly arranged to form structure light speckle patterns that source arranges consistent spread pattern.
Predictably, in the structure light speckle patterns on the right of Fig. 4, single sub- speckle patterns have irrelevance,
However whole structure light speckle patterns irrelevance is still poor, such as in the horizontal direction, in first sub- speckle patterns 403
Any sub-regions (such as subregion of 7x7 pixel sizes) are selected, in other two sub- speckle patterns in the horizontal direction
Subregion the same therewith can be found, thus causes the irrelevance of overall structure hot spot dot pattern in the horizontal direction poor.For
Raising irrelevance, in one embodiment, by light source Heterogeneous Permutation in some way, as shown in figure 5, in order to improve edge
The irrelevance of horizontal direction, it is final to make by the upper adjacent sub-light source being arranged in the horizontal direction vertically into line misregistration
Sub- speckle patterns also occur to misplace accordingly so that whole structured light patterns have higher irrelevance in the horizontal direction.
For in the analysis of Fig. 4 and Fig. 5, the arrangement of sub-light source and the arrangement of sub- speckle patterns are defaulted as identical row
Row, the sub- speckle patterns that actually sub-light source beam emits outward after lens reflect transmit mapping with actual position, make
It obtains and forms one-to-one mapping relations between the arrangement of sub-light source and the arrangement of sub- speckle patterns, such as mapping symmetrical above and below,
Symmetrical mapping, central symmetry mapping etc..
Since lens often bring aberration, sub- speckle patterns and the structure light speckle patterns being made of sub- speckle patterns
It is difficult to the regular shape as shown on the right of Fig. 4 and Fig. 5, actual shape can be deformed, and structure light speckle patterns 60 are rested the head on
Shape is distorted to form shape as shown in FIG. 6, and wherein 601-609 is the sub- speckle patterns of composed structure hot spot dot pattern 60.
The present invention is mainly improved DOE203：DOE passes through the light source to irregular alignment in currently available technology
The arrangement pattern of chip replicated, it is the pattern of arrangements of chips that each block formed in pattern is corresponding；In the present invention, shape
At pattern in single block it is corresponding be irregular pattern that single source is formed by DOE, i.e. DOE to the formation of single light beam not
Regular pattern, the pattern that all single sources are formed is structured light patterns.
After projection module projects structure light speckle patterns into space, acquisition module can be to the structure light speckle patterns
It is acquired.Acquisition module is mainly made of imaging sensor, optical filter and lens, and wherein imaging sensor can be CCD
Or CMOS is generally acquired to save spatial cache by the way of Rolling shutter when acquisition module acquires image data
Image, i.e. an entire image are to be exposed line by line and data acquire, such as gathered data line by line from up to down.Therefore,
In one embodiment, it in order to save the power consumption of projection module, and non-disposable open all sub-light source and comes while illuminating whole
A detected space region, but with acquisition module obtain data mode be synchronised, such as when acquisition module to preceding n rows data into
When row acquisition, sub-light source corresponding with n rows is opened within this time, other sub-light sources are closed.Fig. 6 is returned to, it is false
If the head n rows for 601,602, the 603 correspondence image sensor of sub- speckle patterns that sub-light source is projected, then being exposed in head n rows
Light time only open with sub- speckle patterns 601,602,603 corresponding sub-light sources, successively when other row pixels of imaging sensor expose
Light time vertically opens corresponding sub-light source successively.In some embodiments, it is also possible to open phase by column in the horizontal direction
The sub-light source answered, principle are similar with above description.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
The specific implementation of the present invention is confined to these explanations.For those skilled in the art to which the present invention belongs, it is not taking off
Under the premise of from present inventive concept, several equivalent substitute or obvious modifications can also be made, and performance or use is identical, all answered
When being considered as belonging to protection scope of the present invention.
Claims (10)
1. a kind of structured light projection module of regular array light source, which is characterized in that including：
Array of source includes at least two sub-light sources arranged with rule format；
Lens, for collimating or focusing the light beam emitted by the sub-light source；
Diffraction optical element emits sub- speckle patterns light beam outward after receiving the light beam for the sub-light source being emitted by the lens,
At least two sub- speckle patterns light beam assembled arrangements that at least two sub-light source is formed are at structure light speckle patterns
Change light beam；
Wherein, described in the assembled arrangement form of the described at least two sub- speckle patterns light beams and the array of source extremely
The spread pattern of few two sub-light sources corresponds to.
2. the structured light projection module of regular array light source as described in claim 1, which is characterized in that the sub- speckle patterns
Spot is arranged as irregular alignment in change light beam.
3. the structured light projection module of regular array light source as described in claim 1, which is characterized in that the sub-light source includes
Edge-emitting laser or vertical cavity surface laser emitter.
4. the structured light projection module of regular array light source as described in claim 1, which is characterized in that the array of source is also
Including substrate, at least two sub-light source is arranged over the substrate with rule format.
5. the structured light projection module of regular array light source as described in claim 1, which is characterized in that the adjacent sub-light
It is incident on the angle of diffraction of difference and the diffraction optical element between the beam incident angle on the diffraction optical element in source
It is equal.
6. the structured light projection module of regular array light source as described in claim 1, which is characterized in that the lens are micro-
Lens array, the lenticule unit in the microlens array correspond and described micro- with the sub-light source in the array of source
The center of mirror unit and the center of the sub-light source be not on a horizontal line.
7. the structured light projection module of regular array light source as described in claim 1, which is characterized in that the sub- speckle patterns
Overlapping adjoins each other.
8. the structured light projection module of regular array light source as described in claim 1, which is characterized in that set along first direction
The adjacent sub-light source set misplaces in the second direction vertical with the first direction.
9. a kind of depth camera, which is characterized in that including：
Structured light projection module as described in claim 1-8 is any, for projecting structure light speckle patterns into space；
Module is acquired, for acquiring the structure light speckle patterns in object space；
Processor receives the structured light patterns and the depth image of object space is calculated.
10. depth camera as claimed in claim 9, which is characterized in that the acquisition module is adopted by the way of Rolling shutter
Collect the structure light speckle patterns, the sub-light source in the projection module be configured to the mode synchronous with the Rolling shutter according to
Sequence opens and closes.
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| CN109283508A (en) * | 2018-11-21 | 2019-01-29 | 深圳奥比中光科技有限公司 | Flight time calculation method |
| CN109471323A (en) * | 2018-11-24 | 2019-03-15 | 深圳阜时科技有限公司 | Projection arrangement and its light source and equipment |
| CN110132544A (en) * | 2019-04-19 | 2019-08-16 | 深圳奥比中光科技有限公司 | A kind of optical test equipment |
| CN110275381A (en) * | 2019-06-26 | 2019-09-24 | 业成科技（成都）有限公司 | Structured light mould group and the depth sense equipment for applying it |
| EP3680810A4 (en) * | 2018-11-08 | 2020-07-15 | Shenzhen Goodix Technology Co., Ltd. | Vertical cavity surface light-emitting laser, structured light module, and light projection method and terminal |
| CN112584567A (en) * | 2019-09-30 | 2021-03-30 | 宁波舜宇车载光学技术有限公司 | Multi-chip lighting system and control method thereof |
| CN113113836A (en) * | 2021-04-02 | 2021-07-13 | Oppo广东移动通信有限公司 | Optical sensor and electronic device |
| CN113534484A (en) * | 2020-03-31 | 2021-10-22 | 华为技术有限公司 | Light emitting device and electronic equipment |
| CN114727089A (en) * | 2022-02-28 | 2022-07-08 | 深圳博升光电科技有限公司 | Structured light system, electronic equipment with structured light system and control method |
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