CN108646426A - Laser projection module, image capturing device and electronic equipment - Google Patents
Laser projection module, image capturing device and electronic equipment Download PDFInfo
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- CN108646426A CN108646426A CN201810297788.5A CN201810297788A CN108646426A CN 108646426 A CN108646426 A CN 108646426A CN 201810297788 A CN201810297788 A CN 201810297788A CN 108646426 A CN108646426 A CN 108646426A
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- photodetector
- laser projection
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/4205—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive optical element [DOE] contributing to image formation, e.g. whereby modulation transfer function MTF or optical aberrations are relevant
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/30—Collimators
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1684—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1626—Constructional details or arrangements for portable computers with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- Semiconductor Lasers (AREA)
Abstract
The invention discloses a kind of laser projection module, image capturing device and electronic equipments.Laser projection module includes laser emitter, collimating element, diffraction element and photodetector.Laser emitter is for emitting laser.Collimating element is used for the laser of collimation laser transmitter transmitting.Laser emitter includes edge-emitting laser, and edge-emitting laser includes light-emitting surface, and light-emitting surface is towards collimating element.Diffraction element is for the laser after the collimated element collimation of diffraction.Photodetector is used to detect the intensity of the diffraction order beams in laser after diffraction element diffraction.Embodiment of the present invention obtains laser projection module, image capturing device and electronic equipment and detects the intensity of diffraction order beams in the laser for swashing outgoing by the way that photodetector is arranged, and the driving current of laser emitter is adjusted to change the intensity of diffracted laser beam, to avoid laser too strong the problem of endangering eyes of user of outgoing according to the intensity of diffraction order beams.
Description
Technical field
The present invention relates to 3 Dimension Image Technique field, more particularly to a kind of laser projection module, image capturing device and electricity
Sub- equipment.
Background technology
Existing laser projection module generally includes laser emitter, collimating element and diffraction element.Wherein, diffraction element
For diffracted laser to form laser pattern.But it is limited to the influence of the factors such as the manufacturing process of diffraction element, diffraction element
The diffraction efficiency of diffracted laser is not 100%, and even in use with the increase of service life, diffraction efficiency can be by
Gradually reduce.When diffraction efficiency is less than 100%, some laser will not be diffracted element diffraction and be directly through diffraction element
It projects in object space, this fraction of laser light is zero order beam, and it is non-zero order that the laser in object space is projected after being diffracted
Light beam.With the reduction of diffraction efficiency, the energy of zero order beam can enhance, in this way, the eyes of user may be endangered.
Invention content
The embodiment provides a kind of laser projection module, image capturing device and electronic equipments.
The laser projection module of embodiment of the present invention includes laser emitter, collimating element, diffraction element and light detection
Device.The laser emitter is for emitting laser.The collimating element is used to collimate the laser of the laser transmitter projects, institute
It includes edge-emitting laser to state laser emitter, and the edge-emitting laser includes light-emitting surface, and the light-emitting surface is towards the standard
Straight element.Laser of the diffraction element for diffraction after collimating element collimation.The photodetector is passed through for detecting
After the diffraction element diffraction in the laser diffraction order beams intensity.
The image capturing device of embodiment of the present invention includes above-mentioned laser projection module, image acquisition device and processing
Device.Described image collector is for acquiring the laser pattern projected from the laser projection module into object space.The place
Reason device is used to adjust the power and the processing laser pattern of the laser emitter according to the intensity of the diffraction order beams
To obtain depth image.
The electronic equipment of embodiment of the present invention includes shell and above-mentioned image capturing device.Described image capture device
It is arranged in the shell and is exposed from the shell to obtain depth image.
Embodiment of the present invention obtain laser projection module, image capturing device and electronic equipment by be arranged photodetector come
Detection swashs the intensity of diffraction order beams in the laser being emitted, and the driving of laser emitter is adjusted according to the intensity of diffraction order beams
Electric current is to change the intensity of diffracted laser beam, to avoid laser too strong the problem of endangering eyes of user of outgoing.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the structural schematic diagram of the electronic equipment of certain embodiments of the present invention.
Fig. 2 is the structural schematic diagram of the image capturing device of certain embodiments of the present invention.
Fig. 3 to Fig. 8 is the structural schematic diagram of the laser projection module of certain embodiments of the present invention.
Fig. 9 to Figure 11 is the part-structure schematic diagram of the laser projection module of certain embodiments of the present invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indicating or implies relative importance or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include one or more feature.In description of the invention
In, the meaning of " plurality " is two or more, unless otherwise specifically defined.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be to be electrically connected or can be in communication with each other to be mechanical connection；It can be directly connected, it can also be by between intermediary
It connects connected, can be the interaction relationship of the connection or two elements inside two elements.For the ordinary skill of this field
For personnel, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
Following disclosure provides many different embodiments or example is used for realizing the different structure of the present invention.In order to
Simplify disclosure of the invention, hereinafter the component of specific examples and setting are described.Certainly, they are merely examples, and
And it is not intended to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or reference letter,
This repetition is for purposes of simplicity and clarity, itself not indicate between discussed various embodiments and/or setting
Relationship.In addition, the present invention provides various specific techniques and material example, but those of ordinary skill in the art can be with
Recognize the application of other techniques and/or the use of other materials.
Also referring to Fig. 1 and Fig. 2, the present invention provides a kind of electronic equipment 3000.Electronic equipment 3000 can be intelligence
Mobile phone, Intelligent bracelet, smartwatch, tablet computer, intelligent eyes, intelligent helmet, somatic sensation television game equipment etc..Electronic equipment 3000
Including shell 2000 and image capturing device 1000.The setting of image capturing device 1000 is in shell 2000 and sudden and violent from shell 2000
Dew is to obtain depth image.Image capturing device 1000 includes laser projection module 100, image acquisition device 200 and processor
300.Laser projection module 100 is for projecting laser pattern into object space.Image acquisition device 200 is for acquiring laser projection
The laser pattern that module 100 is projected into object space.Processor 300 is for obtaining laser pattern to obtain depth image.
Specifically, laser projection module 100 projects laser pattern into object space by projecting window 901, and image is adopted
Storage 200 is acquired by acquisition window 902 by the modulated laser pattern of target object.Image acquisition device 200 can be infrared phase
Machine, it is corresponding with reference pattern each that processor 300 uses image matching algorithm to calculate each pixel in the laser pattern
The deviation value of pixel further obtains the depth image of the laser pattern further according to deviation value.Wherein, image matching algorithm can
For related (Digital Image Correlation, the DIC) algorithm of digital picture.It is of course also possible to use other images match
Algorithm replaces DIC algorithms.
As shown in figure 3, laser projection module 100 includes board unit 60 and lens barrel 50.Board unit 60 includes substrate 62
With the circuit board 61 of setting on the substrate 62.Circuit board 61 can be hardboard, soft board or Rigid Flex.Lens barrel 50 includes side wall
51 and from side wall 51 extend plummer 52.The setting of side wall 51 surrounds host cavity 53 on circuit board 61, and with circuit board 61.
Laser projection module 100 further includes laser emitter 10, collimating element 20, diffraction element 30 and photodetector 40.
Laser emitter 10, collimating element 20, diffraction element 30 and photodetector 40 are housed in host cavity 53, and collimating element 20
Luminous light path with diffraction element 30 along laser emitter 10 is arranged in order.Specifically, laser emitter 10 is arranged in circuit board
On 61, laser emitter 10 is for emitting laser.Collimating element 20 is used for the laser that collimation laser transmitter 10 emits.Diffraction member
Part 30 is arranged on plummer 52, and diffraction element 30 is for the laser after the collimated collimation of element 20 of diffraction to form laser figure
Case.Photodetector 40 is used to detect the intensity of diffraction order beams in the laser after 30 diffraction of diffraction element.
Wherein, laser emitter 10 can be vertical cavity surface emitting laser (Vertical Cavity Surface
Emitting Laser, VCSEL), the light emission direction of vertical cavity surface emitting laser is towards collimating element 20.Due to vertical cavity surface
The light source of emitting laser is multiple spot and is in irregular array distribution, therefore, the laser pattern that laser projection module 100 projects
Irrelevance it is larger, be conducive to promoted depth image acquisition precision.
Photodetector 40, which can be photo resistance, photodiode, phototriode etc., to convert light intensity signal
At the element of electric signal.
Diffraction order beams are referred to from the laser light incident that collimating element 20 is emitted into diffraction element 30 again from diffraction element 30
Laser after outgoing, laser at this time include laser (being known as non-zero order light beam) after being diffracted 30 diffraction of element and not by
The laser (being known as zero order beam) of 30 diffraction of diffraction element.Photodetector 40 is arranged to the intensity of detection zero order beam.
Specifically, photodetector 40 is arranged on circuit board 61 and close to the position of laser emitter 10, the receipts smooth surface of photodetector 40
41 is opposite with collimating element 20.The optical axis of diffraction element 30 intersects with the optical axis of laser emitter 10, and compared to Laser emission
The inclined light shaft of device 10, in other words, 30 inclined placement of diffraction element, wherein the value model at the angle of inclination of diffraction element 30
It is [3 °, 5 °] to enclose, in this way, the angle of inclination of diffraction element 30 is smaller, will not be made a significant impact on laser pattern.Specifically
A small protrusion (Fig. 3 can be arranged in a certain position on plummer 52 and the inconsistent resistance surface 521 of diffraction element 30 in ground
It is shown) so that placement status when diffraction element 30 is carried on plummer 52 is heeling condition；Alternatively, in manufacture diffraction member
When part, a small raised (not shown) is manufactured on diffraction element 30 and the inconsistent plane of incidence 301 of plummer 52, so as to spread out
It is heeling condition to penetrate placement status when element 30 is carried on plummer 52.After laser emitter 10 sends out laser, laser is first
First entering to inject collimating element 20, collimated element 20 is emitted after collimating, and the laser of outgoing is again incident in diffraction element 30, wherein
Most of laser is diffracted after 30 diffraction of element forms laser pattern and projects in object space, and fraction laser is because of diffraction element
The limitation of 30 diffraction efficiency can not be diffracted to form zero order beam, and the part in zero order beam is emitted in object space,
A part is diffracted element 30 and is reflected back in host cavity 43.This part of the reflected beams may be disposed at the inspection of the light on circuit board 61
It surveys device 40 to receive, in this way, photodetector 40 is the intensity that can detect zero order beam.In addition, since diffraction element 30 is inclined
It places, therefore, the reflected beams will shift relative to output beam, to invest photodetector 40.
The light that photodetector 40 receives zero order beam generates corresponding electric signal.Processor 300 analyzes the electric signal to sentence
The size of disconnected zero order beam, for example, judging whether the intensity of zero order beam is more than the first preset strength, when the intensity of zero order beam
The driving current for reducing laser emitter 10 when more than the first preset strength avoids zero level to reduce the intensity of zero order beam
The too strong eyes to user of intensity of light beam generate harm.
Laser projection module 100 further includes protective cover 70.Protective cover 70 is the circular configuration of entirety, and protective cover 70 is carried on
On lens barrel 50, and it is in contact with the exit facet 302 of lens barrel roof 54 and diffraction element 30.Protective cover 70 can be by translucent material system
At, such as glass, polymethyl methacrylate (Polymethyl Methacrylate, PMMA), makrolon
(Polycarbonate, PC), polyimides (Polyimide, PI) etc..Since the translucent materials such as glass, PMMA, PC and PI are equal
With excellent light transmission, protective cover 70 can not have to open up loophole.In this way, protective cover 70 can prevent diffraction element
30 while fall off, additionally it is possible to avoid diffraction element 30 exposed in the outside of lens barrel 50, so that 30 waterproof of diffraction element is anti-
Dirt.Certainly, in other embodiments, protective cover 70 can offer loophole, and the optics of loophole and diffraction element 30 has
Effect area is opposite to avoid blocking the light path of diffraction element 30.
Laser projection module 100, image capturing device 1000 and the electronic equipment 3000 of embodiment of the present invention are by setting
The intensity of diffraction order beams in laser of the photodetector 40 to detect outgoing is set, and laser is adjusted according to the intensity of diffraction order beams
The driving current of transmitter 10 too strong endangers asking for eyes of user to change the intensity of diffracted laser beam, to avoid the laser of outgoing
Topic.
Referring to Fig. 4, in some embodiments, circuit board 61 offers via 611.Laser emitter 10 is carried on base
On plate 62 and it is housed in via 611.Photodetector 40 is also carried on the substrate 62 and is housed in via 611.In this way, can be with
Reduce the thickness of laser projection module 100.
Certainly, as shown in figure 5, in some embodiments, laser emitter 10 is carried on the substrate 62 and was housed in
When in hole 611, photodetector 40 can be also carried on circuit board 61.Similarly, laser emitter 10 is to be housed in via 611
It is interior, it can also reduce the thickness of laser projection module 100.
Referring to Fig. 6, in some embodiments, photodetector 40 is arranged to the strong of detection non-zero order light beam
Degree, specifically, the contact surface 701 of protective cover 70 being in contact with diffraction element 30 are provided with container, and photodetector 40 accommodates
In container 71, the side wall 51 for being located proximate to lens barrel 50 of the container 71 to avoid blocking diffraction element 30 luminous light
Road.The receipts smooth surface 41 of photodetector 40 is opposite with diffraction element 30.After laser emitter 10 sends out laser, laser enters to inject first
Collimating element 20, collimated element 20 are emitted after collimating, and the laser of outgoing is again incident in diffraction element 30, are incident on diffraction member
Laser in part 30 forms laser pattern outgoing after the diffraction of diffraction element 30.Zero order beam in the laser pattern of outgoing is logical
Be frequently located in the center position of laser pattern, non-zero order light beam be usually located at laser pattern except center remaining position
Place.In this way, photodetector 40 can receive the light of non-zero order light beam.
The light that photodetector 40 receives non-zero order light beam generates corresponding electric signal.Processor 300 analyze the electric signal with
The size of non-zero order light beam is judged, for example, judging whether the intensity of non-zero order light beam is less than the second preset strength, when non-zero order light
The intensity of beam reduces the driving current of laser emitter 10 when being less than the second preset strength, can accordingly reduce zero order beam
Intensity avoids the intensity of zero order beam too strong and generates harm to the eyes of user.
It is appreciated that when processor 300 is shone with identical driving current driving laser emitter 10, if diffraction element
30 diffraction efficiency is higher, then the intensity of non-zero order light beam should be larger, if but diffraction element 30 diffraction efficiency it is relatively low, light
The output electric signal of detector 40 is relatively low, accordingly illustrates that the intensity of non-zero order light beam is smaller, the intensity of zero order beam is larger.Cause
This, when the intensity for the non-zero order light beam that photodetector 40 detects is smaller, it should which the intensity for reducing zero order beam avoids zero level
The too strong eyes to user of intensity of light beam generate harm.
Also referring to Fig. 7 and Fig. 8, in some embodiments, protective cover 70 is cyclic structure.Protective cover 70 includes ring
Shape roof 72 and the annular peripheral wall 73 extended from annular upper wall 72.Annular peripheral wall 73 is in contact with lens barrel roof 54.Annular upper wall
72 surround light hole 75, and light hole 75 is connected to the projection in order to laser pattern with host cavity 53.Diffraction element 30 carries at this time
On plummer 52, the plane of incidence 301 of diffraction element 30 is in contact with lens barrel roof 54, exit facet and the annular of diffraction element 30
The bottom surface 721 of roof 72 is in contact.
Wherein, as shown in fig. 7, photodetector 40 can be arranged in annular upper wall 72.Specifically, annular upper wall 72 opens up
Fluted 74, photodetector 40 is housed in groove 74, and the receipts smooth surface 41 of photodetector 40 is opposite with diffraction element 30.Light is examined
Survey the intensity that device 40 is used to detect non-zero order light beam.The non-zero order light beam that processor 300 is detected according to photodetector 40 it is strong
The driving current of degree adjustment laser emitter 10.
Alternatively, as shown in figure 8, photodetector 40 is arranged on annular peripheral wall 73.Specifically, annular peripheral wall 73 offers recessed
Slot 74, photodetector 40 are housed in groove 74, and the receipts smooth surface 41 of photodetector 40 is opposite with diffraction element 30.Photodetector
40 intensity for detecting non-zero order light beam.The intensity tune for the non-zero order light beam that processor 300 is detected according to photodetector 40
The driving current of whole laser emitter 10.
Referring again to Fig. 6, in some embodiments, when protective cover 70 is whole circular configuration, photodetector 40 is set
It sets when on protective cover 70 for the intensity of detection non-zero order light beam, conductance slot is offered on protective cover 70 and lens barrel 50,
The conductance slot of protective cover 70 is corresponding with the conductance slot on lens barrel 50 to form a conductance slot 80.It contains and leads in conductance slot 80
Electric device, photodetector 40 are connected by conducting element with circuit board 61.In this way, photodetector 40 and circuit board 61 are electrically connected
It connects, then processor 300 can be indirectly electrically connected by circuit board 61 with photodetector 40, and processor 300 can control light to examine
Survey the unlatching, closing and the driving current for adjusting photodetector 300 of device 300.
Also referring to Fig. 7 and Fig. 8, in some embodiments, when protective cover 70 is loop configuration, photodetector 40 is set
It sets when on protective cover 70 for the intensity of detection non-zero order light beam, conductance slot is offered on protective cover 70 and lens barrel 50,
The conductance slot of protective cover 70 is corresponding with the conductance slot on lens barrel 50 to form a conductance slot 80.It contains and leads in conductance slot 80
Electric device, photodetector 40 are connected by conducting element with circuit board 61.In this way, photodetector 40 and circuit board 61 are electrically connected
It connects, then processor 300 can be indirectly electrically connected by circuit board 61 with photodetector 40, and processor 300 can control light to examine
Survey the unlatching, closing and the driving current for adjusting photodetector 300 of device 300.
Fig. 4 and Fig. 9 are please referred to, in some embodiments, laser projection module 100 further includes fixing piece.Specifically, swash
Optical transmitting set 10 is in the form of a column, and an end face of the laser emitter 10 far from substrate 62 forms light-emitting surface 11.Laser is from light-emitting surface 11
It sends out, light-emitting surface 11 is towards collimating element 20.Laser emitter 10 is fixed on the substrate 62.Fixing piece can be sealing 15, laser
Transmitter 10 is bonded on the substrate 62 by sealing 15, for example, the one side bonding opposite with light-emitting surface 11 of laser emitter 10
On the substrate 62.Incorporated by reference to Fig. 4 and Figure 10, the side 12 of laser emitter 10 can be also bonded on the substrate 62, and sealing 15 is wrapped up
The firmly side 12 of surrounding can also only be bonded some face and substrate 62 or certain be bonded several face and the substrate 62 of side 12.This
When sealing 15 can be heat-conducting glue, by laser emitter 10 work generate heat conduct into substrate 62.Since edge emitting swashs
Light device is in usually fine strip shape, and when the light-emitting surface 11 of edge-emitting laser is towards collimating element 20, edge-emitting laser is put vertically
It sets, edge-emitting laser, which is susceptible to, at this time falls, shifts or shake etc. surprisingly, therefore can be sent out side by the way that sealing 15 is arranged
It penetrates laser to fix, prevents edge-emitting laser from emitting and fall, shift or shake etc. surprisingly.
Also referring to Fig. 4 and Figure 11, in some embodiments, fixing piece can also be the supporting rack 16 of elasticity.Support
The number of frame 16 is two or more.Receiving space 161 is collectively formed in multiple supporting racks 16.Receiving space 161 is for receiving
Hold laser emitter 10,16 support column laser emitter 10 of multiple supporting racks, in this way, can prevent laser emitter 10 from shaking
It is dynamic.
Further, as shown in figure 4, substrate 62 offers heat emission hole 621.Can be filled in heat emission hole 621 heat-conducting glue with
It radiates for laser emitter 10.
In addition, in some embodiments, substrate 62 can be omitted, laser emitter 10 is directly carried on circuit board 61
On.In this way, the thickness of laser projection module 100 can be reduced.
Laser projection module 100, image capturing device 1000 and the electronic equipment 3000 of embodiment of the present invention are by setting
Photodetector 40 is set to detect the intensity of diffraction order beams in the laser for swashing outgoing, and is adjusted and is swashed according to the intensity of diffraction order beams
The driving current of optical transmitting set 10 is to change the intensity of diffracted laser beam, to avoid the too strong eyes of user that endangers of laser of outgoing
Problem.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (10)
1. a kind of laser projection module, which is characterized in that the laser projection module includes：
Laser emitter, the laser emitter is for emitting laser；
Collimating element, the collimating element are used to collimate the laser of the laser transmitter projects, and the laser emitter includes
Edge-emitting laser, the edge-emitting laser include light-emitting surface, and the light-emitting surface is towards the collimating element；
Diffraction element, laser of the diffraction element for diffraction after collimating element collimation；With
Photodetector, the photodetector are used to detect after the diffraction element diffraction the strong of diffraction order beams in the laser
Degree.
2. laser projection module according to claim 1, which is characterized in that the laser projection module further includes substrate in batch
Part and lens barrel, the board unit include the circuit board of substrate and setting on the substrate, and the lens barrel is arranged in the electricity
Host cavity is surrounded on the plate of road and with the circuit board, the laser emitter is arranged on the board unit, the collimation member
Part, the diffraction element are housed in the host cavity, and are set gradually along the luminous light path of the laser emitter, described
The side wall of lens barrel is extended with plummer to the center of the host cavity, and the diffraction element is arranged on the plummer.
3. laser projection module according to claim 2, which is characterized in that the optical axis of the diffraction element and the laser
The optical axis of transmitter intersects, and compared to the inclined light shaft of the laser emitter；The diffraction order beams include zero order beam,
The photodetector is arranged on the board unit, and the receipts smooth surface of the photodetector is opposite with the collimating element, described
Photodetector is used to detect the intensity of the zero order beam.
4. laser projection module according to claim 3, which is characterized in that the circuit board offers via, described to swash
Optical transmitting set and the photodetector are housed in the via.
5. laser projection module according to claim 2, which is characterized in that the laser projection module further includes protection
Cover, the protective cover are carried on the roof of the lens barrel；The diffraction order beams include non-zero order light beam, the photodetector
It is arranged on the protective cover, the photodetector is used to detect the intensity of the non-zero order light beam.
6. laser projection module according to claim 2, which is characterized in that the laser projection module further includes fixing
Part, the fixing piece are used to the edge-emitting laser being fixed on the board unit.
7. laser projection module according to claim 6, which is characterized in that the fixing piece includes sealing, the sealing
It is arranged between the edge-emitting laser and the board unit, the sealing is heat-conducting glue.
8. laser projection module according to claim 6, which is characterized in that the fixing piece includes being arranged in the substrate
Receiving space, the receiving space is collectively formed in the supporting rack of at least two elasticity on component, at least two support frames as described above
For accommodating the laser emitter, at least two support frames as described above are used to support residence and state laser emitter.
9. a kind of image capturing device, which is characterized in that described image capture device includes：
Laser projection module described in claim 1 to 8 any one；
Image acquisition device, described image collector is for acquiring the laser projected from the laser projection module into object space
Pattern；With
Processor, the processor be used for according to the intensity of the diffraction order beams adjust the laser emitter power, with
And the processing laser pattern is to obtain depth image.
10. a kind of electronic equipment, which is characterized in that the electronic equipment includes：
Shell；With
Image capturing device described in claim 9, described image capture device are arranged in the shell and from the shells
Exposure is to obtain depth image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810297788.5A CN108646426A (en) | 2018-04-03 | 2018-04-03 | Laser projection module, image capturing device and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810297788.5A CN108646426A (en) | 2018-04-03 | 2018-04-03 | Laser projection module, image capturing device and electronic equipment |
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| CN108646426A true CN108646426A (en) | 2018-10-12 |
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| CN201810297788.5A Pending CN108646426A (en) | 2018-04-03 | 2018-04-03 | Laser projection module, image capturing device and electronic equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109120837A (en) * | 2018-10-31 | 2019-01-01 | Oppo广东移动通信有限公司 | Image acquiring method, image acquiring device, structure optical assembly and electronic device |
| CN110488562A (en) * | 2019-08-19 | 2019-11-22 | 北京驭光科技发展有限公司 | Integrated laser projection mould group |
| WO2020038067A1 (en) * | 2018-08-22 | 2020-02-27 | Oppo广东移动通信有限公司 | Laser projection module and control method therefor, and depth image acquisition apparatus and electronic device |
| CN112393691A (en) * | 2019-08-14 | 2021-02-23 | Oppo广东移动通信有限公司 | Light emitting module, depth camera and electronic equipment |
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