CN109884849A - Structured light projecting device and its manufacturing method - Google Patents
Structured light projecting device and its manufacturing method Download PDFInfo
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- CN109884849A CN109884849A CN201711277627.1A CN201711277627A CN109884849A CN 109884849 A CN109884849 A CN 109884849A CN 201711277627 A CN201711277627 A CN 201711277627A CN 109884849 A CN109884849 A CN 109884849A
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- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 230000003287 optical effect Effects 0.000 claims abstract description 52
- 230000008859 change Effects 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 26
- 230000001788 irregular Effects 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 238000003384 imaging method Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
This application provides a kind of structured light projecting devices comprising: laser emitter；Collimating lens system in the optical path of the light issued positioned at the laser emitter, is collimated with the light issued to the laser emitter；And driver, drive the laser emitter to move and/or rotate along the optical path direction, to change position and angle of the laser emitter relative to the surface of extraterrestrial target.
Description
Technical field
This application involves a kind of structured light projecting devices, relate more specifically to a kind of structured light projection dress of auto-focusing
It sets.The application further relates to a kind of method for manufacturing the structured light projecting device, the depth including the structured light projecting device
Camera and electronic equipment including the depth camera.
Background technique
With development in science and technology, depth camera technology is also more and more perfect (such as its imaging effect more preferably etc.), therefore depth
Camera is gradually applied on various electronic equipments.
Important composition component of the structured light projecting device as depth camera, the quality of function will directly influence entirely
The function of depth camera.For example, structured light projection Mo Zu drop shadow effect is poor, then the image quality of entire depth camera can be made to become
Difference.However, if eyes can be caused to hurt by the drop shadow effect of enhancing structure light projective module group if converging to the structure light of human eye
Evil.Therefore the convergence form for the structure light that can be projected on extraterrestrial target surface is restricted, this will affect structured light projection
The projection scope of mould group.Further, since different distance needs the different convergence depth of field, otherwise hot spot is crossed conference and is interfered with each other, nothing
Method guarantees accurate recognition effect, therefore structured light projecting device is all fixed structure at present, i.e., when in use, the optics such as focus
Parameter will not change, and the shooting distance of depth camera is a fixed range (the similar depth of field).If extraterrestrial target
Super to go beyond the scope, structured light projecting device just not can guarantee the structure light quality for being projeced into extraterrestrial target surface, so that
Depth camera imaging effect is deteriorated.In other words, structure light is projected in spot size, the brightness on extraterrestrial target surface in the range
It is required etc. meeting to receive, but once exceeds the range, so that projection variation is not easy identified or cannot be identified, nothing
Method is received mould group and receives or identify that (that is, beyond after the range, hot spot can not be received mould group because excessive and receive, know
Not), thus the imaging effect and image quality of influence depth camera.
As a result, existing depth camera be more be arranged at electronic equipment front end (for example, front camera), thus
Only it is capable of providing the imaging of short distance.But with the development in market, short distance shooting imaging is difficult to meet demand, therefore is badly in need of
Increase depth camera of the shooting distance without influencing imaging effect.
Summary of the invention
On this basis, the application proposes for structured light projecting device to be designed as a kind of structure light throwing for capableing of auto-focusing
Image device is adjusted, so that auto-focusing structured light projecting device by parameters such as position, angles to laser emitter
Drop shadow spread becomes larger (that is, apart from increasing), so that entire depth camera shooting distance increases.According to the application propose from
The structured light projecting device of dynamic focusing, can be adjusted, so that the structure that structured light projecting device projects by algorithm
Even if light spot size, luminous intensity etc. are also complying with demand at a distance, it is possibly realized so that increasing shooting distance.
According to the one aspect of the application, a kind of structured light projecting device is provided.The structured light projecting device includes: sharp
Optical transmitting set；Collimating lens system, in the optical path of the light issued positioned at laser emitter, to be issued to laser emitter
Light collimated；And driver, driving laser emitter is moved and/or is rotated along optical path direction, described in changing
Position and angle of the laser emitter relative to the surface of extraterrestrial target.
According to the illustrative embodiments of the application, which may also include diffraction optical element, position
In side of the collimating lens system far from the laser emitter, sky will be projected to by the light of the collimating lens system
Between target surface.
According to the illustrative embodiments of the application, which, which may also include, is electrically connected to laser emitter
Wiring board, which can be used for carrying laser emitter.
According to the illustrative embodiments of the application, driver can with driver circuit plate together with laser emitter along light
Road direction is mobile or together relative to the angled rotation of optical path direction.
According to the illustrative embodiments of the application, the driver can directly be contacted with laser emitter, with driving
Laser emitter moves along optical path direction and/or relative to the angled rotation of optical path direction.
According to the illustrative embodiments of the application, laser emitter can be electrically connected by flexible wire and the wiring board
It connects.
According to the illustrative embodiments of the application, wherein laser emitter may include the multiple laser hair being arranged in array
Penetrate source.
According to the illustrative embodiments of the application, wherein the structured light projecting device may also include multiple drivers,
For respectively driving multiple laser emitting sources.
According to presently filed embodiment, the diffraction light department of the Chinese Academy of Sciences may include diffracting layer.Diffracting layer can make light beam splitting.
According to presently filed embodiment, the diffraction light department of the Chinese Academy of Sciences may also include irregular speckle layer.Irregular speckle layer can have
There is irregular speckle pattern.
According to the another aspect of the application, a kind of method for manufacturing structured light projecting device is passed through.This method can
It include: offer laser emitter；Collimating lens system is set in the optical path for the light that laser emitter is issued, with for pair
It is collimated by the light that laser emitter is issued；And driver is set adjacent to laser emitter, with sharp for driving
Optical transmitting set is moved and/or is rotated along optical path direction, so as to adjust the structure hot spot on the surface for being incident upon the extraterrestrial target
Size.
According to the illustrative embodiments of the application, this method may additionally include collimating lens system far from laser emitter
Side on diffraction optical element is set, for the surface of extraterrestrial target will to be projected to by the light of collimating lens system.
According to the illustrative embodiments of the application, this method may also include circuit board electrical connection to laser emitter.
The wiring board can be used for carrying laser emitter.
According to the illustrative embodiments of the application, this method may also include driver circuit plate edge together with laser emitter
The optical path direction it is mobile or together relative to the angled rotation of the optical path direction.
According to the illustrative embodiments of the application, this method may also include driving laser emitter along the optical path side
To movement and/or relative to the angled rotation of the optical path direction.
According to the illustrative embodiments of the application, this method may also include for example by flexible wire by laser emitter
It is electrically connected to wiring board.
According to the illustrative embodiments of the application, this method, which may also include, arranges multiple laser emitting sources in array manner
To constitute laser emitter.
According to the illustrative embodiments of the application, this method, which may also include, sends out multiple laser by individual driver
Each of source is penetrated to be driven respectively.
According to the another aspect of the application, a kind of depth camera is provided.The depth camera may include tying as described above
Structure optical projection device and receiving module.Wherein, which can be zoom mould group or fixed-focus mould group, and the reception
The field depth of mould group should be greater than or equal to structured light projecting device drop shadow spread.In addition, the depth camera may also include RGB
Mould group.
According to the application's in another aspect, additionally providing a kind of electronic equipment including above-mentioned depth camera.
Detailed description of the invention
Below in conjunction with attached drawing, the principle of the application design is explained by describing the illustrative embodiments of the application.It answers
Work as understanding, attached drawing is intended to show that the illustrative embodiments of the application rather than is limited.Wherein, attached drawing is for offer pair
The application design is further understood, and is incorporated in specification and is formed part of this specification.Identical attached drawing in attached drawing
Label indicates identical feature.In the accompanying drawings:
Fig. 1 shows the schematic diagram of the structured light projecting device of the illustrative embodiments according to the application；
After Fig. 2A to Fig. 2 C shows collimated lens system collimation, the schematic diagram of the light beam of DOE diffraction (beam splitting)；
Fig. 3 shows the schematic diagram of the structured light projecting device of the another exemplary embodiment according to the application；
Fig. 4 shows the schematic diagram of the structured light projecting device of the another exemplary embodiment according to the application
Fig. 5 shows the signal of the laser emitter of the structured light projecting device of the illustrative embodiments according to the application
Figure；
Fig. 6 shows the cross-sectional view of the acquisition of the line A-A according to the illustrative embodiments of the application in Fig. 3；And
Fig. 7 shows the schematic stream of the structured light projecting device for manufacturing the illustrative embodiments according to the application
Cheng Tu.
Specific embodiment
Various aspects of the reference attached drawing to the application are made more detailed description by the application in order to better understand.It answers
Understand, the only description to the illustrative embodiments of the application is described in detail in these, rather than limits the application in any way
Range.
Terms used herein are the purposes in order to describe specific exemplary embodiments, and are not intended to be limited.
When used in this manual, term "comprising", " including ", " comprising " and/or " including " indicate there are the feature,
Whole, component, assembly unit and/or their combination, but it is not excluded that one or more of the other feature, entirety, component, assembly unit
And/or the existence of their combination.
It is described herein with reference to the schematic diagram of illustrative embodiments.Illustrative embodiments disclosed herein is not answered
Be construed as limited to the concrete shape shown and size, but the various equivalent structures including can be realized identical function and by
Such as manufacture the shape and size deviation of generation.Position shown in the drawings is substantially schematical, and is not intended to each portion
The position of part is limited.
Unless otherwise defined, otherwise all terms (including technical terms and scientific terms) used herein have and this public affairs
That opens person of an ordinary skill in the technical field is generally understood identical meaning.Term defined in such as common dictionary should be by
It is construed to have and its consistent meaning of meaning under the context of related fields, and will be not with idealization or excessively formal
Meaning is explained, unless be clearly defined herein.
The various aspects of the application are described in detail below with reference to attached drawing.
Fig. 1 shows the schematic diagram of the structured light projecting device 100 according to the illustrative embodiments of the application.Structure light
Projection arrangement 100 may include laser emitter (VCSEL) 11, collimating lens system 12 and diffraction optical element (DOE) 13.Such as
Shown in Fig. 1, collimating lens system 12 can be located on the optical path L for the light that laser emitter 11 is issued, to Laser emission
The light that device 11 is issued is collimated.Diffraction optical element 13 can be located at collimating lens system 12 far from laser emitter 11
Side by the light beam splitting of collimating lens system 12 and will be projected to the surface of extraterrestrial target.When in use, Laser emission
Device 11 issues light, is then collimated by collimating lens system 12, then again by 13 beam splitting of diffraction optical element, then projects
To the surface of extraterrestrial target.
As shown in Figure 1, structured light projecting device 100 may also include structural support 10 and driver 14.Structural support
10 can be used for providing support for collimating lens system 12 and diffraction optical element (DOE) 13.Driver 14 can drive laser to send out
Emitter 11 is moved along optical path direction L and/or is angularly rotated relative to optical path direction L, to change structured light projection dress
The parameters such as 100 laser emitter 11 and the relative position of extraterrestrial target and angle are set, so that being incident upon the surface of extraterrestrial target
Size, the luminous intensity of structure hot spot etc. correspondingly change.For example, in the application, the feature of extraterrestrial target can be identified in advance,
If extraterrestrial target is identified as human eye, light is without convergence；If the extraterrestrial target for not needing to shut the light, can
By the laser emitter 11 of change structured light projecting device 100 and the relative distance of extraterrestrial target and relative angle etc., so that
Light convergence is to adjust depth of focus.In presently filed embodiment, the laser of the structured light projecting device 100 of auto-focusing is sent out
Emitter 11 can move, that is, laser emitter 11 can move under the action of driver 14 along optical path direction, so that structure
The projection of light can satisfy demand, that is, is projected in structure light spot size, the luminous intensity on the surface of extraterrestrial target etc. and suits the requirements,
It can accurately be identified.
As seen in figs. 2a-2c, theoretically, after the collimated lens system 12 of light that laser emitter 11 issues collimates, DOE spreads out
The light beam for penetrating (beam splitting) should be parallel to each other, i.e., at (such as Fig. 2A) in the same size of space any position hot spot, but by
There are error in optical component manufacturing process, light beam can not accomplish parallel (such as Fig. 2 B), so that spot size can become
Change, and spot size then will affect the reception of receiving module.In general, by adjusting collimating lens system 12 and laser emitter 11
Distance and relative angle, the depth of focus of adjustable entire projection arrangement.Herein, depth of focus may be interpreted as light beam and spread out by DOE
The range that mould group accurately identifies can be received after penetrating.For example, as shown in Figure 2 B, depth of focus can be shown as L1 and L2 in Fig. 2 B
Between range.Such as but not limit, depth of focus can be very good to be received and known by receiving module between L1 and L2
Other spot size, density, luminous intensity etc..In this application, as shown in Figure 2 C, to collimate by mobile laser emitter 11
Lens system 12 and the distance of laser emitter 11 change, to change the position of depth of focus, realize that shooting distance changes.So
And should be appreciated that and light beam (light source on VCSEL issues) is only shown for ease of description, in Fig. 2, actually make
With there is many light sources either multiple VCSEL arrays on middle VCSEL, and each VCSEL has multiple light sources.
As described above, laser emitter 11 can be moved along optical path direction L.The movement of laser emitter 11 can pass through calculation
Method is controlled, and accurate movement is realized by algorithm according to the position feedback with extraterrestrial target, so that drop shadow effect is more
It is good.
In the exemplary embodiment, driver 14 can be the lesser component of motor equidimension.
Referring again to Fig. 1, structured light projecting device 100 may also include the wiring board 15 that is electrically connected with laser emitter 11 with
Control the state of laser emitter 11.In general, the anode of laser emitter 11 is connected to wiring board using metal wire, and its cathode
Then it is directly arranged on wiring board.Due to metal wire is more crisp thus alternate stress effect under it is easily broken, in the application
Laser emitter 11 can be set into be moved together with wiring board.But it is also possible to upgrade to metal wire, such as utilize silicon
Material is made into conducting wire, then coats conductive metal on surface and be attached, so that driver 14 can also directly drive laser emitter
11 are moved.Laser emitter 11 and the exemplary connection type of wiring board 15 are only shown above, it should be understood that laser emitter
11 can be electrically connected with wiring board 15 in any suitable manner, for example, utilizing flexible wire etc..
Fig. 3 shows the schematic diagram of the structured light projecting device 100 of the another exemplary embodiment according to the application.?
In embodiment shown in Fig. 3, the anode and cathode of laser emitter 11 are with the electric signal connector of such as flexible wire
It is connected to wiring board, to allow driver that laser emitter 11 is only driven to be moved.
Fig. 3 shows the schematic diagram of the structured light projecting device 100 of the another exemplary embodiment according to the application.?
In embodiment shown in Fig. 4, diffraction optical element (DOE) 13 includes diffracting layer 131 and irregular speckle layer 132.Diffracting layer
131 are used for diffracted ray, that is, make light beam splitting.
In conventional structure optical projection device, irregular speckle pattern is usually designed in laser emitter 11, causes to swash
Structure is complicated for optical transmitting set 11.And in the present embodiment, irregular speckle layer 132 has irregular speckle pattern, swashs in this way
Optical transmitting set 11 need not just be equipped with irregular speckle pattern, to simplify the structure of laser emitter 11, reduce laser hair
The design difficulty of emitter 11.
According to another illustrative embodiments of the application, driver 14 can also drive laser emitter 11 relative to light
The angled rotation of road direction L, so that structured light projection meet demand, that is, be projected in the structure light on extraterrestrial target surface
Spot size meets demand.For example, can be by driving the driver 14 of each side of laser emitter 11 with friction speed
It moves and rotates laser emitter 11.But it is also possible to other modes appropriate drive laser emitter 11 to rotate, example
Laser emitter rotation is such as driven by specific rotating mechanism.
Fig. 5 shows the exemplary of the laser emitting source 101 on the laser emitter 11 according to presently filed embodiment
Arrangement.As shown in figure 5, multiple laser emitting sources 101 can be arranged in array to form the laser emitter 11 of desired size.It answers
Work as understanding, the arrangement of laser emitting source 101 shown in Fig. 5 is only an example, rather than to the shape of laser emitter 11 and
Size is limited.It will be appreciated by those skilled in the art that the arrangement of laser emitting source 101, size and number etc. can roots
It is adjusted according to actual needs.
Fig. 6 shows the cross-sectional view of the acquisition of the line A-A according to the illustrative embodiments of the application in Fig. 3.Such as Fig. 6 institute
Show, each of multiple laser emitting sources 101 in laser emitter 11 can be carried out respectively by using individual driver
Driving, to adjust the parameters such as position, angle of the laser emitter 11 relative to extraterrestrial target more flexiblely.
In this application, joined by changing structured light projecting device relative to the position of extraterrestrial target, distance, angle etc.
Number, so that the drop shadow spread of structure light is bigger, so as to not cause to drop shadow effect in the case where increasing projector distance
It influences.
Fig. 7 shows the method 1000 of the structured light projecting device for manufacturing the illustrative embodiments according to the application
Schematic flow chart.In order to manufacture structured light projecting device as described above, provides conform to according to actual needs first
The laser emitter (step S1001) asked.Then, collimation lens can be set in the optical path for the light that laser emitter is issued
System is collimated (step S1002) with the light issued to the laser emitter.In following step S1003,
Collimating lens system is arranged in far from the side of laser emitter, so that passing through collimating lens system in diffraction optical element
Light beam splitting and be projected on the surface of extraterrestrial target.This method may additionally include adjacent to the position of the laser emitter
Place's setting driver, changes the laser emitter phase to drive laser emitter along optical path direction to move and/or rotate
Position and angle for the surface of extraterrestrial target, to adjust projection scope.(S1004).
According to the illustrative embodiments of the application, can also be arranged a kind of includes 100 He of above structure optical projection device
The depth camera of receiving module.Structured light projecting device 100 and receiving module can be connected to processor.Receiving module can be can
Auto-focusing (zoom) mould group or fixed-focus mould group.It is appreciated that the range of the structure light of projection will not influence receiving module
Effect, that is to say, that the field depth of receiving module should be greater than or equal to structured light projecting device drop shadow spread.Certain
In embodiment, depth camera may also include RGB mould group.Further, it is also possible to which a kind of electronics including above-mentioned depth camera is arranged
Equipment, such as, but not limited to smart phone, Tachographs, tablet computer, wearable device etc..
It is described above by reference to illustrative embodiments of the attached drawing to the application.Those skilled in the art should manage
Solution, above embodiment is solely for the purpose of illustration and the example lifted, rather than is used to limit scope of the present application.This Shen
Range please will be by the appended claims and its any and all equivalent, any combination of all width including its feature
Degree provides.All any modifications made under teachings of the present application and claims, equivalent replacement etc. should all include
This application claims in the range of.
Claims (25)
1. a kind of structured light projecting device, comprising:
Laser emitter；
Collimating lens system, in the optical path of the light issued positioned at the laser emitter, to the laser emitter institute
The light of sending is collimated；And
Driver drives the laser emitter to move and/or rotate along the optical path direction, to change the Laser emission
Position and angle of the device relative to the surface of extraterrestrial target.
2. structured light projecting device as described in claim 1, wherein the structured light projecting device further include:
Diffraction optical element, the side positioned at the collimating lens system far from the laser emitter, will pass through the standard
The light of straight lens system is projected to the surface of the extraterrestrial target.
3. structured light projecting device as described in claim 1, wherein the structured light projecting device further include:
Wiring board is electrically connected to the laser emitter, and carries the laser emitter.
4. structured light projecting device as claimed in claim 3, wherein the driver drives the wiring board and the laser
Transmitter is moved along the optical path direction together.
5. structured light projecting device as claimed in claim 3, wherein the driver drives the wiring board and the laser
Transmitter is together relative to the angled rotation of the optical path direction.
6. structured light projecting device as claimed in claim 3, wherein
The laser emitter passes through flexible wire and the circuit board electrical connection.
7. structured light projecting device as claimed in claim 6, wherein the driver directly connects with the laser emitter
Touching, to drive the laser emitter to move along the optical path direction.
8. structured light projecting device as claimed in claim 6, wherein the driver directly connects with the laser emitter
Touching, to drive the laser emitter relative to the angled rotation of the optical path direction.
9. such as structured light projecting device described in any item of the claim 1 to 8, wherein the laser emitter includes in battle array
Arrange multiple laser emitting sources of arrangement.
10. structured light projecting device as claimed in claim 9, wherein the structured light projecting device includes multiple drivers,
To respectively drive the multiple laser emitting source.
11. structured light projecting device as claimed in claim 2, wherein the diffraction optical element includes diffracting layer, described to spread out
Penetrating layer makes the light beam splitting.
12. structured light projecting device as claimed in claim 11, wherein the diffraction optical element further includes irregular speckle
Layer, the irregular speckle layer have irregular speckle pattern.
13. a kind of method for manufacturing structured light projecting device, comprising:
Laser emitter is provided；
Collimating lens system is set in the optical path for the light that the laser emitter is issued, for the Laser emission
The light that device is issued is collimated；And
Driver is set adjacent to the laser emitter, for driving the laser emitter to move along the optical path direction
Dynamic and/or rotation is to change position and angle of the laser emitter relative to the surface of extraterrestrial target.
14. method as claimed in claim 13 further includes one in the collimating lens system far from the laser emitter
Diffraction optical element is set on side, for will be projected to the table of the extraterrestrial target by the light of the collimating lens system
Face.
15. method as claimed in claim 13, further includes:
By circuit board electrical connection to the laser emitter, wherein the wiring board carries the laser emitter.
16. method as claimed in claim 15, further includes:
The wiring board is driven to move together with the laser emitter along the optical path direction.
17. method as claimed in claim 15, further includes:
Drive the wiring board together with the laser emitter relative to the angled rotation of the optical path direction.
18. method as claimed in claim 15, further includes:
The laser emitter is driven to move along the optical path direction.
19. method as claimed in claim 15, further includes:
Drive the laser emitter relative to the angled rotation of the optical path direction.
20. method as claimed in claim 18, further includes:
The laser emitter is electrically connected to the wiring board by flexible wire.
21. method as claimed in claim 19, further includes:
The laser emitter is electrically connected to the wiring board by flexible wire.
22. the method as described in any one of claim 13 to 21, wherein the laser emitter includes being arranged in array
Multiple laser emitting sources.
23. method as claimed in claim 22, further includes:
Each of the multiple laser emitting source is driven respectively by individual driver.
24. a kind of depth camera, comprising:
Structured light projecting device as described in any one of claims 1 to 12, and
Receiving module, wherein the receiving module is zoom mould group or fixed-focus mould group, and the field depth of the receiving module
More than or equal to the drop shadow spread of the structured light projecting device.
25. a kind of electronic equipment, including depth camera as claimed in claim 24.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711277627.1A CN109884849A (en) | 2017-12-06 | 2017-12-06 | Structured light projecting device and its manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711277627.1A CN109884849A (en) | 2017-12-06 | 2017-12-06 | Structured light projecting device and its manufacturing method |
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| CN109884849A true CN109884849A (en) | 2019-06-14 |
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| CN201711277627.1A Pending CN109884849A (en) | 2017-12-06 | 2017-12-06 | Structured light projecting device and its manufacturing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112945520A (en) * | 2019-12-11 | 2021-06-11 | 余姚舜宇智能光学技术有限公司 | Projector assembling apparatus and assembling method thereof |
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