CN207780447U - Laser projection module, depth camera and electronic device - Google Patents
Laser projection module, depth camera and electronic device Download PDFInfo
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- CN207780447U CN207780447U CN201820278745.8U CN201820278745U CN207780447U CN 207780447 U CN207780447 U CN 207780447U CN 201820278745 U CN201820278745 U CN 201820278745U CN 207780447 U CN207780447 U CN 207780447U
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- projection module
- laser projection
- optical element
- diffraction optical
- board unit
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Abstract
The utility model discloses a kind of laser projection module, depth camera and electronic devices.Laser projection module includes board unit, barrel assembly, light source assembly, collimating element and diffraction optical element.Barrel assembly is arranged on board unit and host cavity is collectively formed with board unit, and barrel assembly includes in host cavity and the resistance surface opposite with board unit.Light source assembly is arranged on board unit and is housed in host cavity.Collimating element is housed in host cavity.Diffraction optical element is housed in host cavity and is contradicted with resistance surface.Light source assembly, collimating element and diffraction optical element are successively set in the light path of light source assembly.The laser projection module, depth camera and electronic device of the utility model contradict diffraction optical element so that diffraction optical element is housed in host cavity using resistance surface, laser projection modular structure is simple, it is easy to assembly, it can prevent diffraction optical element from falling off along light direction.
Description
Technical field
The utility model is related to optics and electronic technology fields, more specifically, are related to a kind of laser projection module, depth
Camera and electronic device.
Background technology
Existing projection module generally comprises the structures such as mirror holder, light source, collimating mirror, diffraction optical element, and collimating mirror is used for
The laser that the light source of collimation or convergence projection module is sent out, diffraction optical element (diffractive optical elements,
DOE the laser projection after) being used to collimate or converge is at laser pattern, but diffraction optical element is typically to be attached to glue
Mirror holder upper end and it is exposed outside mirror holder, be easy to fall off.
Utility model content
A kind of laser projection module of the utility model embodiment offer, depth camera and electronic device.
The laser projection module of the utility model embodiment includes：
Board unit；
Barrel assembly, the barrel assembly are arranged on the board unit and receiving are collectively formed with the board unit
Chamber, the barrel assembly include in the host cavity and the resistance surface opposite with the board unit；
Light source assembly, the light source assembly are arranged on the board unit and are housed in the host cavity；
Collimating element, the collimating element are housed in the host cavity；And
Diffraction optical element, the diffraction optical element are housed in the host cavity and are contradicted with the resistance surface, institute
Light source assembly, the collimating element and the diffraction optical element is stated to be successively set in the light path of the light source assembly.
In some embodiments, the board unit includes circuit board, and the light source assembly and the barrel assembly are set
It sets on the circuit board.
In some embodiments, the board unit includes the circuit board of substrate and carrying on the substrate, described
Circuit board offers via, and the light source assembly is carried on the substrate and is housed in the via.
In some embodiments, the substrate is made of metal material.
In some embodiments, the barrel assembly includes lens barrel, and the lens barrel includes roof and prolongs from the roof
The annular peripheral wall stretched, the peripheral wall are arranged on the board unit, and the roof offers leading to of be connected to the host cavity
Unthreaded hole, the resistance surface are the surface of the roof being located in the host cavity.
In some embodiments, the laser projection module further includes spacer ring, and the spacer ring is located at the diffraction
Between optical element and the collimating element, the opposite both sides of the spacer ring respectively with the collimating element and the diffraction light
Element is learned to contradict.
In some embodiments, the collimating element includes the mounting portion that optical section and the circular optical section are arranged,
The optical section includes two curved surfaces positioned at the opposite both sides of the collimating element, and the mounting portion is contradicted with the spacer ring,
Curved surface stretches into the spacer ring one of in the optical section.
In some embodiments, the barrel assembly includes lens barrel and protective cover, and the lens barrel includes opposite top
And bottom, the lens barrel are formed through the through-hole at the top and the bottom, the bottom is carried on the board unit
On, the inner wall of the lens barrel is extended with annular plummer to the center of the through-hole, and the protective cover is arranged on the top,
The opposite both sides of the diffraction optical element are contradicted with the protective cover and the plummer respectively, and the resistance surface is the guarantor
The surface inconsistent with the diffraction optical element of shield.
In some embodiments, the protective cover is made of metal material.
In some embodiments, the protective cover offers loophole, the loophole and the through-hole alignment.
In some embodiments, the protective cover is made of translucent material.
In some embodiments, the collimating element includes the mounting portion that optical section and the circular optical section are arranged,
The optical section includes two curved surfaces positioned at the opposite both sides of the collimating element, and the mounting portion is contradicted with the plummer,
Curved surface stretches into the plummer one of in the optical section.
In some embodiments, the barrel assembly includes lens barrel and protective cover, and the lens barrel includes roof and from institute
The annular peripheral wall of roof extension is stated, the peripheral wall is arranged on the board unit, and the roof offers and the host cavity
The light hole of connection, the protective cover are arranged on the roof, the protective cover include offer light extraction through-hole baffle and
The annular sidewall extended from the baffle, the diffraction optical element are carried on the roof and are housed in the protective cover
Interior, the opposite both sides of the diffraction optical element are contradicted with the protective cover and the roof respectively, and the resistance surface is described
The surface inconsistent with the diffraction optical element of protective cover.
In some embodiments, the collimating element includes the mounting portion that optical section and the circular optical section are arranged,
The optical section includes two curved surfaces positioned at the opposite both sides of the collimating element, and the mounting portion is contradicted with the roof, institute
Curved surface one of is stated in optical section to stretch into the light hole.
The depth camera of the utility model embodiment includes：
Laser projection module described in any of the above-described embodiment；
Image acquisition device, described image collector project after the diffraction optical element into object space for acquiring
Laser pattern；And
The processor being connect respectively with the laser projection module and described image collector, the processor is for locating
The laser pattern is managed to obtain depth image.
The electronic device of the utility model embodiment includes：
Shell；And
Above-mentioned depth camera, the depth camera are arranged in the shell and are exposed from the shell to obtain depth
Image.
Laser projection module, depth camera and electronic device provided by the utility model contradict diffraction optics using resistance surface
For element so that diffraction optical element is housed in host cavity, laser projection modular structure is simple, easy to assembly, can prevent diffraction
Optical element falls off along light direction.
The additional aspect and advantage of the embodiment of the utility model will be set forth in part in the description, partly will be from
Become apparent in following description, or is recognized by the practice of the embodiment of the utility model.
Description of the drawings
In description of the above-mentioned and/or additional aspect and advantage of the utility model from combination following accompanying drawings to embodiment
It will be apparent and be readily appreciated that, wherein：
Fig. 1 is the structural schematic diagram of the laser projection module of the utility model embodiment；
Fig. 2 is the structural schematic diagram of the laser projection module of another embodiment of the utility model；
Fig. 3 is the structural schematic diagram of the laser projection module of another embodiment of the utility model；
Fig. 4 is the structural schematic diagram of the laser projection module of another embodiment of the utility model；
Fig. 5 is the structural schematic diagram of the laser projection module of another embodiment of the utility model；
Fig. 6 is the structural schematic diagram of the laser projection module of another embodiment of the utility model；
Fig. 7 is the structural schematic diagram of the depth camera of the utility model embodiment；With
Fig. 8 is the structural schematic diagram of the electronic device of the utility model embodiment.
Specific implementation mode
The embodiment of the utility model is described further below in conjunction with attached drawing.Same or similar label in attached drawing
Same or similar element or element with the same or similar functions are indicated from beginning to end.
In addition, the embodiment of the utility model described below in conjunction with the accompanying drawings is exemplary, it is only used for explaining this reality
With novel embodiment, and should not be understood as limiting the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature is "above" or "below" second feature
Can be that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, first is special
Sign second feature " on ", " top " and " above " can be fisrt feature and be directly above or diagonally above the second feature, or only
Indicate that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
Referring to Fig. 1, the laser projection module 100 of the utility model embodiment includes board unit 10, barrel assembly
20, light source assembly 30, collimating element 40 and diffraction optical element 50.Barrel assembly 20 is arranged on board unit 10 and and base
Host cavity 21 is collectively formed in board group part 10.Barrel assembly 20 includes in host cavity 21 and the conflict opposite with board unit 10
Face 22.Light source assembly 30 is arranged on board unit 10 and is housed in host cavity 21.Collimating element 40 is housed in host cavity 21
It is interior.Diffraction optical element 50 is housed in host cavity 21 and is contradicted with resistance surface 22.Light source assembly 30, collimating element 40 and diffraction
Optical element 50 is successively set in the light path of light source assembly 30.
Specifically, light source assembly 30 is arranged on board unit 10, and collimating element 40 and diffraction optical element 50 can be consolidated
It is scheduled in the host cavity 21 of barrel assembly 20, such as is fixed on barrel assembly 20 by way of viscose.Diffraction optical element
50 contradict with resistance surface 22, prevent diffraction optical element 50 from falling off from barrel assembly 20 along light direction.
When assembling laser projection module 100, diffraction optical element 50, collimating element are put into barrel assembly 20 successively
40 and install the board unit 10 of light source assembly 30.Light source assembly 30 can be first arranged on board unit 10, then again will
The board unit 10 for being provided with light source assembly 30 is combined with barrel assembly 20.
The laser projection module 100 of the utility model embodiment can be used for three-dimensional imaging.Specifically, light source assembly 30
After the collimated collimation of element 40 of light beam sent out or convergence, expanded by diffraction optical element 50 and outside with certain laser pattern
Transmitting, laser pattern project the surface of target object.In some embodiments, can (can be Fig. 7 institutes by infrared camera
The image acquisition device 200 shown) acquisition is by the modulated laser pattern of target object, by dividing the laser pattern modulated
Analysis calculates the depth image for obtaining target object.
The laser projection module 100 of the utility model embodiment contradicts diffraction light using the resistance surface 22 of barrel assembly 20
Element 50 is learned so that diffraction optical element 50 is housed in host cavity 21, laser projection module 100 is simple in structure, easy to assembly,
It can prevent diffraction optical element 50 from falling off along light direction.
Please continue to refer to Fig. 1, the laser projection module 100 of the utility model embodiment includes board unit 10, lens barrel
Component 20, light source assembly 30, collimating element 40 and diffraction optical element 50.Light source assembly 30, collimating element 40 and diffraction optics
Element 50 is successively set in the light path of light source assembly 30.
Board unit 10 includes the circuit board 12 of substrate 11 and carrying on the substrate 11.
Substrate 11 is for carrying barrel assembly 20, light source assembly 30 and circuit board 12.The material of substrate 11 can be modeling
Material.For example, polyethylene terephthalate (Polyethylene Glycol Terephthalate, PET), poly- methyl-prop
E pioic acid methyl ester (Polymethyl Methacrylate, PMMA), makrolon (Polycarbonate, PC), polyimides
At least one of (Polyimide, PI).In other words, any one in PET, PMMA, PC or PI may be used in substrate 11
Unitary plastic material is made.In this way, 11 light weight of substrate and have enough support strengths.
Via 121 is offered on circuit board 12.Circuit board 12 can be printed circuit board (FCB), flexible PCB
(FPC), any one of Rigid Flex.One end of circuit board 12 is connect by flexible PCB with connector 15.At other
In embodiment, circuit board 12 can be located at a part in host cavity 21, and another part is stretched out from barrel assembly 20.Specifically
The one end on ground, circuit board 12 is located in host cavity 21 and for carrying light source assembly 30, part and connector that the other end stretches out
15 connections.Connector 15 can be connect with other electronic devices (such as mainboard of electronic device).
Barrel assembly 20 is arranged on board unit 10 and host cavity 21 is collectively formed with board unit 10.Barrel assembly 20
Include positioned at interior and opposite with substrate 11 resistance surface 22 of host cavity 21.Specifically, in the present embodiment, barrel assembly 20 wraps
Include lens barrel 23.Lens barrel 23 includes roof 231 and the annular peripheral wall 232 from the extension of roof 231.Peripheral wall 232 is carried on board unit
On 10.Roof 231 offers the light hole 233 being connected to host cavity 21, and resistance surface 22 is roof 231 in host cavity 21
Surface.Light hole 233 is corresponding with light source assembly 30, and light hole 233 is used to be emitted the laser figure of the projection of diffraction optical element 50
Case.Peripheral wall 232 can be fixed on the circuit board 12, such as be pasted by glue.
Light source assembly 30 is used for shoot laser.Light source assembly 30 is carried on the substrate 11 and is housed in via 121.Via
121 size is corresponding with the size of light source assembly 30, i.e., the size of via 121 is more than the size or via of light source assembly 30
The sizableness of 121 size and light source assembly 30.Light source assembly 30 can be to include semiconductor substrate and setting in semiconductor
Emitting laser on substrate.Semiconductor substrate is arranged on the substrate 11.Emitting laser can be vertical cavity surface-emitting laser
Device (Vertical Cavity Surface Emitting Laser, VCSEL).Semiconductor substrate can be arranged single transmitting and swash
The array laser being made of multiple emitting lasers can also be arranged in light device, specifically, multiple emitting lasers with rule or
The form arrangement of the irregular two-dimensional pattern of person is on a semiconductor substrate.Light source assembly 30 further includes cathode and anode.Anode and
Cathode is connect by conducting wire 14 with the positive and negative electrode of circuit board 12 respectively.
Collimating element 40 is used for the laser that collimated light source component 30 is emitted.Collimating element 40 is housed in host cavity 21.It is accurate
Straight element 40 is optical lens.Specifically, collimating element 40 includes optical section 41 and the mounting portion 42 around the setting of optical section 41.
Optical section 41 includes two curved surfaces positioned at 40 opposite both sides of collimating element.
Diffraction optical element 50 (Diffractive Optical Elements, DOE) is housed in host cavity 21.Diffraction
Optical element 50 includes opposite first surface 51 and second surface 52, and first surface 51 is contradicted with resistance surface 22.More specifically,
Diffraction optical element 50 is aligned with the light hole 233 of barrel assembly 20, and roof 231 contradicts diffraction optical element 50 so that diffraction light
It learns element 50 to be fixed in host cavity 21, to make diffraction optical element 50 not fall off from host cavity 21 along light direction.Spread out
Penetrating on 50 surface of optical element has diffraction structure, and the laser projection after can collimating collimating element 40 is at corresponding with diffraction structure
Laser pattern.Diffraction optical element 50 can be made of glass, can also be made of composite plastic (such as PET).
When assembling above-mentioned laser projection module 100, diffraction optics member is put into barrel assembly 20 successively along light path
Part 50, collimating element 40 and the board unit 10 for installing light source assembly 30.The first surface 51 and resistance surface of light source assembly 30
22 contradict, and second surface 52 is opposite with a curved surface of optical section 41, another curved surface and 30 phase of light source assembly of optical section 41
It is right.Light source assembly 30 can be first mounted on board unit 10, then will be equipped with the board unit 10 1 of light source assembly 30 again
It rises and is combined with barrel assembly 20.
The laser projection module 100 of the utility model embodiment contradicts diffraction light using the roof 231 of barrel assembly 20
Element 50 is learned so that diffraction optical element 50 is housed in host cavity 21, laser projection module 100 is simple in structure, easy to assembly,
It can prevent diffraction optical element 50 from falling off along light direction.In addition, the circuit board 12 of board unit 10 offers via 121,
Light source assembly 30 is housed in via 121, reduces thickness of the laser projection module 100 on optical path direction.
In some embodiments, substrate 11 can also be made of heat sink material.For example, substrate 11 is nonconducting ceramics
Material, ceramic material thermal conductivity is good, stability is good.In addition, substrate 11 can also be made of metal material, such as by aluminium, gold, copper
In any one be made or be made of aluminium, gold, the copper alloy of any one, in this way, substrate 11 is in carrying light source assembly
30 and while barrel assembly 20, moreover it is possible to radiate to light source assembly 30, improve the service life of laser projection module 100.
Referring to Fig. 2, in some embodiments, substrate 11 offers heat emission hole 111, heat emission hole 111 can be to open up
On the substrate 11 close to the blind hole of 30 side of light source assembly, or through-hole.The shape of heat emission hole 111 can be round, square
Shape.Further, the quantity of heat emission hole 111 can be one, and position corresponding with light source assembly 30 opens up on the substrate 11
Heat emission hole 111.The quantity of heat emission hole 111 may be multiple.Multiple heat emission holes 111 can be arranged in substrate with a matrix type
It, can also be densely arranged (as shown in Figure 2) close to the position of light source assembly 30 on 11.
In other embodiments, in heat emission hole 111 can with filling heat-conductive silicone grease or Heat Conduction Material (such as silver, copper,
Gold etc.) to radiate.When the material of substrate 11 is ceramics and offers heat emission hole 111 as described above, in heat emission hole 111
Filling heat-conductive silicone grease or Heat Conduction Material (such as silver, copper, gold etc.) are to radiate.In this way, compared to substrate 11 directly by making pottery
For ceramic material is made, heat conductivility is better.When the material of substrate 11 is metal material and offers as described above dissipate
When hot hole 111, filling heat-conductive performance ratio better metal of metal material heat conductivility in heat emission hole 111.For example, working as substrate 11
Material be aluminium when, inject copper in heat emission hole 111, for another example when the material of substrate 11 be copper when, noted in heat emission hole 111
Enter gold.In this way, for compared to substrate 11, directly relatively low by heat conductivility and lower-cost metal material is made, heat conductivility
More well, for and being directly made of excellent thermal conductivity and the higher metal material of cost compared to substrate 11, cost
It is lower.When the material of substrate 11 is plastics and offers heat emission hole 111 as described above, filling heat-conductive in heat emission hole 111
Silicone grease or Heat Conduction Material (such as silver, copper, gold etc.), at this time 11 one side of substrate play a supporting role, on the other hand play scattered
Heat effect, and for being directly made of heat sink material (metal material or ceramic material) compared to substrate 11, quality is lighter
Just.
Referring to Fig. 3, in some embodiments, board unit 10 can only include circuit board 12, light source assembly 30 and mirror
Cartridge module 20 carries on the circuit board 12.The peripheral wall 232 of lens barrel 23 is viscous on the circuit board 12 by glue.In this way, reducing sharp
The thickness of light projection module 100.In other embodiments, can be opened up on circuit board 12 it is fluted, light source assembly 30 setting exists
It is connected in groove and by pad, in this way, further decreasing the thickness of laser projection module 100.
Please continue to refer to Fig. 1, in some embodiments, laser projection module 100 may also include spacer ring 24, spacer ring
24 between diffraction optical element 50 and collimating element 40, the opposite both sides of spacer ring 24 respectively with collimating element 40 and diffraction
Optical element 50 contradicts.Spacer ring 24 is arranged between collimating element 40 and diffraction optical element 50.Specifically, 24 ring of spacer ring
Around being carried on the mounting portion 42 of collimating element 40, curved surface stretches into spacer ring 24 one of in optical section 41.Spacer ring
24 side is contradicted with mounting portion 42, and the other side and the diffraction optical element 50 of spacer ring 24 contradict.In this way, not increasing laser
While projecting 100 thickness of module, spacer ring 24 can also be spaced diffraction optical element 50.In other embodiments, pass through
Using the spacer ring 24 of different-thickness, the relative position of diffraction optical element 50 and collimating element 40 can be adjusted, to reach
Better optical effect.
Referring to Fig. 4, in some embodiments, the structure and and collimating element of the barrel assembly 20 of the above embodiment
40, the position relationship between diffraction optical element 50 can be changed to：Barrel assembly 20 includes lens barrel 23 and protective cover 25, lens barrel
23 include opposite top 234 and bottom 235.Lens barrel 23 is formed through the through-hole 236 of top 234 and bottom 235.Bottom
235 are carried on board unit 10.The inner wall of lens barrel 23 is extended with annular plummer 237, protective cover 25 to the center of through-hole 236
It is arranged on top 234, the opposite both sides of diffraction optical element 50 are contradicted with protective cover 25 and plummer 237 respectively, resistance surface
22 be the surface inconsistent with diffraction optical element 50 of protective cover 25.
Specifically, diffraction optical element 50 includes opposite first surface 51 and second surface 52.Protective cover 25 can cover
It is located on top 234, can also be pasted onto by glue on top 234.Protective cover 25 and first surface 51 are inconsistent, that is, support
Contacting surface 22 contradicts diffraction optical element 50 to prevent diffraction optical element 50 from falling off from through-hole 236 along light direction.
In some embodiments, protective cover 25 is made of metal material, such as silver nanowire, metal silver wire, copper sheet etc..
Protective cover 25 made of metal offers loophole 251 (as shown in Figure 4).Loophole 251 is aligned with through-hole 236.Thoroughly
Unthreaded hole 251 is used to be emitted the laser pattern of the projection of diffraction optical element 50.The pore size of loophole 251 is less than diffraction optics member
At least one of the width of part 50 or length are diffraction optical element 50 to be housed in through-hole 236.
Also referring to Fig. 4 and Fig. 5, in some embodiments, protective cover 25 can also be made of translucent material, 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 all have excellent light transmission
Performance, protective cover 25 can not have to open up loophole 251.In this way, protective cover 25 can prevent diffraction optical element 50 from falling off
While, additionally it is possible to avoid diffraction optical element 50 exposed in the outside of barrel assembly 20, to keep diffraction optical element 50 anti-
Water is dust-proof.In other embodiments, protective cover 25 can offer loophole 251, and loophole 251 is aligned with through-hole 236.
Please continue to refer to Fig. 4, in some embodiments, collimating element 40 includes optical section 41 and is set around optical section 41
The mounting portion 42 set.Plummer 237 is arranged between top 234 and bottom 235, is also disposed at diffraction optical element 50 and collimation
Between element 40.Optical section 41 includes two curved surfaces positioned at 40 opposite both sides of collimating element, and mounting portion 42 is supported with plummer 237
It touches, one of optical section 41 curved surface stretches into plummer 237.In this way, not increasing the thickness of laser projection module 100
Meanwhile plummer 237 can both carry diffraction optical element 50, can also be spaced collimating element 40 and diffraction optical element 50.
When assembling above-mentioned laser projection module 100, along light path from the bottom of barrel assembly 20 235 successively to through-hole
It is put into collimating element 40 in 236 and installs the board unit 10 of light source assembly 30.Light source assembly 30 can first be mounted on substrate
On component 10, then the board unit 10 for being equipped with light source assembly 30 is fixed with bottom 235 again.Against light path direction from top
Diffraction optical element 50 is put into through-hole 236 and is carried on plummer 237 by portion 234, then installs protective cover 25 again.Wherein,
The first surface 51 of light source assembly 30 and the surface (resistance surface 22) of the close through-hole 236 of protective cover 25 contradict, second surface 52
Opposite with a curved surface of optical section 41, another curved surface of optical section 41 is opposite with light source assembly 30.Laser projection module 100
It is simple in structure, it is easy to assembly.
Referring to Fig. 6, in some embodiments, the structure and and collimating element of the barrel assembly 20 of the above embodiment
40, the position relationship between diffraction optical element 50 can also be changed to：Barrel assembly 20 includes lens barrel 23 and protective cover 25.Mirror
Cylinder 23 includes roof 231 and the annular peripheral wall 232 from the extension of roof 231.Peripheral wall 232 is arranged on board unit 10, roof 231
Offer the light hole 233 being connected to host cavity 21.Protective cover 25 is arranged on roof 231.Protective cover 25 includes offering out
The baffle 253 of light through-hole 252 and the annular sidewall 254 extended from baffle 253.Diffraction optical element 50 is carried on roof 231
And it is housed in protective cover 25.The opposite both sides of diffraction optical element 50 are contradicted with protective cover 25 and roof 231 respectively, resistance surface
22 be the surface inconsistent with diffraction optical element 50 of protective cover 25.
Specifically, diffraction optical element 50 includes opposite first surface 51 and second surface 52.Diffraction optical element 50
It is carried on roof 231, first surface 51 and the surface (resistance surface 22) of the close light hole 233 of baffle 253 contradict, the second table
Face 52 is contradicted with roof 231.Light hole 233 is aligned with host cavity 21, and light extraction through-hole 252 is aligned with light hole 233.Roof 231,
Annular sidewall 254 and baffle 253 are contradicted with diffraction optical element 50, to prevent diffraction optical element 50 along light direction from guarantor
It falls off in shield 25.In some embodiments, protective cover 25 is pasted onto by glue 60 on roof 231.
Please continue to refer to Fig. 6, in some embodiments, collimating element 40 includes optical section 41 and is set around optical section 41
The mounting portion 42 set, optical section 41 include two curved surfaces positioned at 40 opposite both sides of collimating element, and mounting portion 42 is supported with roof 231
It touches, curved surface stretches into light hole 233 one of in optical section 41.
When assembling above-mentioned laser projection module 100, along light path from the bottom end of the peripheral wall 232 of barrel assembly 20 successively
It is put into collimating element 40 into host cavity 21 and installs the board unit 10 of light source assembly 30.Light source assembly 30 can first pacify
On board unit 10, then the board unit 10 for being equipped with light source assembly 30 is combined with barrel assembly 20 together again.It is inverse
Diffraction optical element 50 is carried on roof 231 by the direction for light path, and then protective cover 25 is mounted on roof 231, from
And diffraction optical element 50 is made to be housed in protective cover 25.In this way, laser projection module 100 is installed simply.In other embodiment party
In formula, first diffraction optical element 50 can also be reversed and be arranged in protective cover 25, then again by diffraction optical element 50 and guarantor
Shield 25 is installed along on roof 231.At this point, the second surface 52 of diffraction optical element 50 is contradicted with resistance surface 22, (figure is not
Show), first surface 51 and roof 231 contradict and opposite with a curved surface of optical section 41, another curved surface of optical section 41 with
Light source assembly 30 is opposite.In this way, laser projection module 100 install it is simpler.
Also referring to Fig. 1 and Fig. 7, the depth camera 400 of the utility model embodiment includes any of the above-described embodiment party
Laser projection module 100, image acquisition device 200 described in formula and processor 300.Image acquisition device 200 is for acquiring through diffraction
The laser pattern projected into object space after optical element 50.Processor 300 respectively with laser projection module 100 and image
Collector 200 connects.Processor 300 is for handling laser pattern to obtain depth image.
Specifically, laser projection module 100 projects the laser figure projected into object space outward by projecting window 401
Case, image acquisition device 200 are acquired by acquisition window 402 by the modulated laser pattern of target object.Image acquisition device 200 can
For infrared camera, processor 300 is calculated in the laser pattern using image matching algorithm in each pixel and reference pattern
The deviation value of corresponding each pixel, the depth image of the laser pattern is further obtained further according to the deviation value.Wherein, image
Matching algorithm can be related (Digital Image Correlation, the DIC) algorithm of digital picture.It is of course also possible to use its
Its image matching algorithm replaces DIC algorithms.
The supporting using barrel assembly 20 of laser projection module 100 in the depth camera 400 of the utility model embodiment
Contacting surface 22 contradicts diffraction optical element 50 so that diffraction optical element 50 is housed in host cavity 21,100 knot of laser projection module
Structure is simple, easy to assembly, can prevent diffraction optical element 50 from falling off along light direction.Depth camera 400 have other have
Beneficial effect has the advantage that similar with above-mentioned laser projection module 100, and details are not described herein.
Also referring to Fig. 1 and Fig. 8, the electronic device 1000 of the utility model embodiment includes shell 500 and above-mentioned
The depth camera 400 of embodiment.The setting of depth camera 400 exposes in shell 500 and from shell 500 to obtain depth map
Picture.
The supporting using barrel assembly 20 of laser projection module 100 in the electronic device 1000 of the utility model embodiment
Contacting surface 22 contradicts diffraction optical element 50 so that diffraction optical element 50 is housed in host cavity 21,100 knot of laser projection module
Structure is simple, easy to assembly, can prevent diffraction optical element 50 from falling off along light direction.Electronic device 1000 have other have
Beneficial effect has the advantage that similar with above-mentioned laser projection module 100, and details are not described herein.
In the description of this specification, reference term " certain embodiments ", " embodiment ", " some embodiment party
The description of formula ", " exemplary embodiment ", " example ", " specific example " or " some examples " means in conjunction with the embodiment
Or example particular features, structures, materials, or characteristics described are contained at least one embodiment of the utility model or show
In example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or example.And
And particular features, structures, materials, or characteristics described can be in any one or more embodiments or example to close
Suitable mode combines.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one feature.The meaning of " plurality " is at least two, such as two in the description of the present invention,
It is a, three, unless otherwise specifically defined.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
It inside can make changes, modifications, alterations, and variations to the above described embodiments, the scope of the utility model is by claim and its is equal
Object limits.
Claims (16)
1. a kind of laser projection module, which is characterized in that the laser projection module includes：
Board unit；
Barrel assembly, the barrel assembly are arranged on the board unit and host cavity are collectively formed with the board unit,
The barrel assembly includes in the host cavity and the resistance surface opposite with the board unit；
Light source assembly, the light source assembly are arranged on the board unit and are housed in the host cavity；
Collimating element, the collimating element are housed in the host cavity；And
Diffraction optical element, the diffraction optical element are housed in the host cavity and are contradicted with the resistance surface, the light
Source component, the collimating element and the diffraction optical element are successively set in the light path of the light source assembly.
2. laser projection module according to claim 1, which is characterized in that the board unit includes circuit board, described
Light source assembly and the barrel assembly are arranged on the circuit board.
3. laser projection module according to claim 1, which is characterized in that the board unit includes substrate and is carried on
Circuit board on the substrate, the circuit board offer via, and the light source assembly is carried on the substrate and is housed in
In the via.
4. laser projection module according to claim 3, which is characterized in that the substrate is made of metal material.
5. laser projection module according to claim 1, which is characterized in that the barrel assembly includes lens barrel, the mirror
Cylinder includes that roof and the annular peripheral wall from roof extension, the peripheral wall are arranged on the board unit, and the roof is opened
Equipped with the light hole being connected to the host cavity, the resistance surface is the surface of the roof being located in the host cavity.
6. laser projection module according to claim 5, which is characterized in that the laser projection module further includes interval
Ring, the spacer ring between the diffraction optical element and the collimating element, distinguish by the opposite both sides of the spacer ring
It is contradicted with the collimating element and the diffraction optical element.
7. laser projection module according to claim 6, which is characterized in that the collimating element includes optical section and surround
The mounting portion of the optical section setting, the optical section includes two curved surfaces positioned at the opposite both sides of the collimating element, described
Mounting portion is contradicted with the spacer ring, and curved surface stretches into the spacer ring one of in the optical section.
8. laser projection module according to claim 1, which is characterized in that the barrel assembly includes lens barrel and protection
Cover, the lens barrel include opposite top and bottom, and the lens barrel is formed through the through-hole at the top and the bottom, institute
It states bottom to be carried on the board unit, the inner wall of the lens barrel is extended with annular plummer, institute to the center of the through-hole
Protective cover is stated to be arranged on the top, the opposite both sides of the diffraction optical element respectively with the protective cover and the carrying
Platform contradicts, and the resistance surface is the surface inconsistent with the diffraction optical element of the protective cover.
9. laser projection module according to claim 8, which is characterized in that the protective cover is made of metal material.
10. laser projection module according to claim 8, which is characterized in that the protective cover offers loophole, described
Loophole and the through-hole alignment.
11. laser projection module according to claim 8, which is characterized in that the protective cover is made of translucent material.
12. laser projection module according to claim 8, which is characterized in that the collimating element includes optical section and ring
Around the mounting portion of optical section setting, the optical section includes two curved surfaces positioned at the opposite both sides of the collimating element, institute
It states mounting portion to contradict with the plummer, curved surface stretches into the plummer one of in the optical section.
13. laser projection module according to claim 1, which is characterized in that the barrel assembly includes lens barrel and protection
Cover, the lens barrel include roof and the annular peripheral wall that extends from the roof, and the peripheral wall setting is on the board unit, institute
It states roof and offers the light hole being connected to the host cavity, the protective cover is arranged on the roof, the protective cover packet
The annular sidewall for including the baffle for offering light extraction through-hole and extending from the baffle, the diffraction optical element are carried on the top
On wall and be housed in the protective cover, the opposite both sides of the diffraction optical element respectively with the protective cover and the roof
It contradicts, the resistance surface is the surface inconsistent with the diffraction optical element of the protective cover.
14. laser projection module according to claim 13, which is characterized in that the collimating element includes optical section and ring
Around the mounting portion of optical section setting, the optical section includes two curved surfaces positioned at the opposite both sides of the collimating element, institute
It states mounting portion to contradict with the roof, curved surface stretches into the light hole one of in the optical section.
15. a kind of depth camera, which is characterized in that including：
Laser projection module described in claim 1-14 any one；
Image acquisition device, described image collector be used to acquire projected into object space after the diffraction optical element it is sharp
Light pattern；And
The processor being connect respectively with the laser projection module and described image collector, the processor is for handling institute
Laser pattern is stated to obtain depth image.
16. a kind of electronic device, which is characterized in that including：
Shell；And
Depth camera described in claim 15, the depth camera are arranged in the shell and are exposed from the shell to obtain
Take depth image.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820278745.8U CN207780447U (en) | 2018-02-27 | 2018-02-27 | Laser projection module, depth camera and electronic device |
| EP19752412.7A EP3572769A4 (en) | 2018-02-27 | 2019-01-30 | Laser projection module, depth camera, and electronic device |
| US16/484,705 US11525669B2 (en) | 2018-02-27 | 2019-01-30 | Laser projection module, depth camera and electronic device |
| PCT/CN2019/073949 WO2019165879A1 (en) | 2018-02-27 | 2019-01-30 | Laser projection module, depth camera, and electronic device |
| TW108106939A TWI771569B (en) | 2018-02-27 | 2019-02-27 | Laser projection module , depth camera and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820278745.8U CN207780447U (en) | 2018-02-27 | 2018-02-27 | Laser projection module, depth camera and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207780447U true CN207780447U (en) | 2018-08-28 |
Family
ID=63210270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820278745.8U Expired - Fee Related CN207780447U (en) | 2018-02-27 | 2018-02-27 | Laser projection module, depth camera and electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207780447U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181777A (en) * | 2018-02-27 | 2018-06-19 | 广东欧珀移动通信有限公司 | Laser projection module, depth camera and electronic device |
| CN110895371A (en) * | 2018-09-13 | 2020-03-20 | 三赢科技（深圳）有限公司 | Optical projection device |
| CN114125204A (en) * | 2020-08-28 | 2022-03-01 | 宁波舜宇光电信息有限公司 | Optical lens, preparation method thereof, camera module and electronic equipment |
-
2018
- 2018-02-27 CN CN201820278745.8U patent/CN207780447U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181777A (en) * | 2018-02-27 | 2018-06-19 | 广东欧珀移动通信有限公司 | Laser projection module, depth camera and electronic device |
| CN110895371A (en) * | 2018-09-13 | 2020-03-20 | 三赢科技（深圳）有限公司 | Optical projection device |
| CN114125204A (en) * | 2020-08-28 | 2022-03-01 | 宁波舜宇光电信息有限公司 | Optical lens, preparation method thereof, camera module and electronic equipment |
| CN114125204B (en) * | 2020-08-28 | 2024-05-14 | 宁波舜宇光电信息有限公司 | Optical lens, preparation method thereof, camera module and electronic equipment |
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| CP01 | Change in the name or title of a patent holder |
Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. Address before: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. |
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Granted publication date: 20180828 |