CN108388067A - Laser projection module, depth camera and electronic device - Google Patents
Laser projection module, depth camera and electronic device Download PDFInfo
- Publication number
- CN108388067A CN108388067A CN201810161930.3A CN201810161930A CN108388067A CN 108388067 A CN108388067 A CN 108388067A CN 201810161930 A CN201810161930 A CN 201810161930A CN 108388067 A CN108388067 A CN 108388067A
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- China
- Prior art keywords
- lens barrel
- projection module
- laser projection
- side wall
- laser
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/145—Housing details, e.g. position adjustments thereof
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Semiconductor Lasers (AREA)
Abstract
The invention discloses a kind of laser projection modules.Laser projection module includes board unit, lens barrel, light source, collimating element, diffraction optics member, protection cap and detecting element.Lens barrel includes lens barrel side wall, and lens barrel side wall forms host cavity with board unit, and lens barrel includes limit protrusion.Light source is arranged on board unit and for emitting laser to host cavity.Collimating element is housed in host cavity.Diffraction optical element is mounted on limit protrusion, and light source, collimating element and diffraction optical element are successively set in the light path of light source.Protection cap is combined with lens barrel, and protection cap includes protection roof, and protection roof offers light hole, and light hole is corresponding with diffraction optical element, and diffraction optical element is located between limit protrusion and protection roof, and detecting element is embedded in the protection roof.Invention additionally discloses a kind of depth camera and electronic devices.Diffraction optical element limits position by protection roof together with limit protrusion, will not fall off along light direction.
Description
Technical field
The present invention relates to optics and electronic technology fields, more specifically, are related to a kind of laser projection module, depth camera
And electronic device.
Background technology
Laser projection module needs that diffraction optical element (diffractive is arranged in the transmitting light path of laser
Optical elements, DOE), and diffraction optical element is usually adhered directly to by glue on the lens barrel of laser projection module,
And glue is easy failure, causes diffraction optical element to fall off, laser is easy the user that burns after directly launching.
Invention content
A kind of laser projection module of embodiment of the present invention offer, depth camera and electronic device.
The laser projection module of embodiment of the present invention includes：
Board unit；
Lens barrel, the lens barrel include lens barrel side wall, the lens barrel side wall be arranged on the board unit and with the base
Host cavity is collectively formed in board group part, and the lens barrel includes from the inwardly projecting limit protrusion of the lens barrel side wall；
Light source, the light source are arranged on the board unit and for emitting laser to the host cavity；
Collimating element, the collimating element are housed in the host cavity；
Diffraction optical element, the diffraction optical element are mounted on the limit protrusion, the light source, collimation member
Part and the diffraction optical element are successively set in the light path of the light source；
Protection cap, the protection cap are combined with the lens barrel, and the protection cap includes protection roof, and the protection roof is opened
Equipped with light hole, the light hole is corresponding with the diffraction optical element, and the diffraction optical element is located at the limit protrusion
Between the protection roof；With
Detecting element, the detecting element are embedded in the protection roof, the laser for detecting the light source transmitting
Intensity of illumination.
In some embodiments, the lens barrel includes opposite the first face and the second face, second face and the base
Board group part combines, and the limit protrusion is between first face and second face, the protection roof and described first
Face offsets.
In some embodiments, the protection cap further includes the protective side wall extended from the periphery of the protection roof,
The protection cap is located on the lens barrel, and the protective side wall is fixedly connected with the lens barrel side wall.
In some embodiments, the outer wall of the lens barrel side wall offers glue groove, the protective side wall and the appearance
The corresponding position of glue groove offers dispensing hole, to allow glue to enter the glue groove by the dispensing hole.
In some embodiments, the dispensing hole is corresponding with the madial wall of the glue groove, and the madial wall, which tilts, to be connected
Connect the outer wall of the inner bottom wall and the lens barrel side wall of the glue groove.
In some embodiments, the protection cap further includes the first card from the inwardly projecting elasticity of the protective side wall
It hooks, the lens barrel further includes the second hook outwardly protruded from the inner bottom wall of the glue groove, and the protection cap is located at described
When on lens barrel, first hook engages with second hook.
In some embodiments, the protective side wall offers avoid holes in position corresponding with first hook,
The avoid holes are used for during the protection cap is located at the lens barrel, first hook and the second hook phase
It supports and first hook occurs to provide deformation space when elastic deformation.
In some embodiments, second hook is formed with guide ramp, and the lens barrel is inserted in along the protection cap
Direction, the guide ramp is gradually distance from the inner bottom wall, during the protection cap is located at the lens barrel, described
One hook offsets with the guide ramp.
In some embodiments, the protective side wall includes the sub- side wall of protection that multiple head and the tail connect successively, Mei Gesuo
It states the sub- side wall of protection and has been respectively formed on first hook and the dispensing hole.
In some embodiments, at least formed with two dispensing holes, first card on each sub- side wall of protection
It hooks between at least two dispensing holes.
In some embodiments, first hook is located at the centre position of the corresponding sub- side wall of protection, each
At least two dispensing holes on the sub- side wall of protection are symmetrical relative to first hook.
In some embodiments, the limit protrusion is in continuous cyclic annular；Or the limit protrusion include it is multiple, it is multiple
The limit protrusion is spaced apart.
In some embodiments, the light source includes edge-emitting laser, and the edge-emitting laser includes light-emitting surface,
The light-emitting surface is towards the collimating element.
In some embodiments, the laser projection module further includes fixing piece, and the fixing piece is used for the side
Emitting laser is fixed on the board unit.
In some embodiments, the fixing piece includes sealing, sealing setting the edge-emitting laser with
Between the board unit, the sealing is heat-conducting glue.
In some embodiments, the fixing piece includes supporting rack, and support frame as described above is arranged on the board unit,
The edge-emitting laser is fixed on support frame as described above.
In some embodiments, the detecting element includes photodiode.
The depth camera of embodiment of the present invention includes：
The laser projection module；
Image acquisition device, described image collector project after the diffraction optical element into object space for acquiring
Laser pattern；With
The processor being connect respectively with the laser projection module and described image collector, the processor is for handling
The laser pattern is to obtain depth image.
In some embodiments, the processor is additionally operable to be judged according to the detection signal of the detecting element described sharp
The working condition of light projection module is to control the light source transmitting of the laser projecting apparatus or close.
The electronic device of embodiment of the present invention includes：
Shell；With
The depth camera, the depth camera are arranged in the shell and are exposed from the shell to obtain depth
Image.
In the laser projection module of embodiment of the present invention, depth camera and electronic device, due to protection cap and lens barrel knot
It closes, the position of protection roof diffraction-limited optical element together with limit protrusion of protection cap, diffraction optical element will not be along going out
Light direction falls off, and avoids laser without launching after diffraction optical element, while detecting element passes through detection and emits laser
Intensity of illumination detection light source working condition, avoid the exception of light source.
The additional aspect and advantage of embodiments of the present invention will be set forth in part in the description, partly will be from following
Description in become apparent, or the practice of embodiment through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention is from combining in description of the following accompanying drawings to embodiment by change
It obtains obviously and is readily appreciated that, wherein：
Fig. 1 is the structural schematic diagram of the electronic device of embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the depth camera of embodiment of the present invention；
Fig. 3 is the stereoscopic schematic diagram of the laser projection module of embodiment of the present invention；
Fig. 4 is the floor map of the laser projection module of embodiment of the present invention；
Fig. 5 is the perspective exploded view figure of the laser projection module of embodiment of the present invention；
Fig. 6 is schematic cross-section of the laser projection module shown in Fig. 4 along line VI -- VI；
Fig. 7 is illustrating along the section of laser projection module line VI -- VI as shown in fig. 4 for another embodiment of the present invention
Figure；
Fig. 8 is schematic cross-section of the laser projection module shown in Fig. 4 along VIII-VIII lines；
Fig. 9 is the enlarged diagram of the parts IX of the laser projection module in Fig. 8；
Figure 10 is the enlarged diagram of the X section of laser projection module shown in fig. 5；
Figure 11 is the stereoscopic schematic diagram of the protection cap of the laser projection module of embodiment of the present invention；
Figure 12 is the part-structure schematic diagram of the laser projection module of embodiment of the present invention；
Figure 13 is the part-structure schematic diagram of the laser projection module of embodiment of the present invention；
Figure 14 is that the laser projection module of embodiment of the present invention removes the floor map after protection cap；
Figure 15 is that the laser projection module of another embodiment of the present invention removes the floor map after protection cap；
Figure 16 is that the laser projection module of a further embodiment of the present invention removes the floor map after protection cap；
Figure 17 is the structural schematic diagram of the diffraction optical element and lens barrel side wall of embodiment of the present invention；
Figure 18 is that the laser projection module of a further embodiment of this invention removes the floor map after protection cap；
Figure 19 is the structural schematic diagram of the diffraction optical element and lens barrel side wall of a further embodiment of this invention.
Figure 20 is the another embodiment of embodiment of the present invention along laser projection module line VI -- VI as shown in fig. 4
Schematic cross-section；
Figure 21 is to Figure 23 be embodiment of the present invention laser projecting apparatus part-structure schematic diagram.
Main element symbol description：
Electronic device 1000, depth camera 100, laser projection module 10, board unit 11, substrate 111, dissipates shell 200
Hot hole 1111, via 113, lens barrel 12, host cavity 121, lens barrel side wall 122, limit protrusion 123, crosses unthreaded hole at circuit board 112
1231, confined planes 1232, the first face 124, the second face 125, glue groove 126, madial wall 1261, inner bottom wall 1262, the second hook
127, guide ramp 1271, the first positioning region 128, the first chamfering 1281, confined planes recess 1282, confined planes convex block 1283, mirror
Cylinder recess 1284, lens barrel convex block 1285, light source 13, edge-emitting laser 131, light-emitting surface 1311, side 1312, collimating element
14, optical section 141, mounting portion 142, diffraction optical element 15, top surface 151, bottom surface 152, side 153, sub- side 1531, second
Positioning region 154, bottom surface convex block 1542, bottom surface recess 1543, side convex block 1544, side-facing depressions 1545, is protected at second chamfering 1541
Protecting cover 16, protection roof 161, light hole 1611, protective side wall 162, the sub- side wall 1621 of protection, dispensing hole 163, the first hook
164, avoid holes 165, connector 17, fixing piece 18, sealing 181, supporting rack 182, detecting element 19, image acquisition device 20, place
Manage device 30, projection window 40, acquisition window 50.
Specific implementation mode
Embodiments of the present invention are described further below in conjunction with attached drawing.Same or similar label is from beginning in attached drawing
To the same or similar element of expression or element with the same or similar functions eventually.
In addition, the embodiments of the present invention described below in conjunction with the accompanying drawings are exemplary, it is only used for explaining the present invention's
Embodiment, and be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One 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 electronic device 1000 of embodiment of the present invention includes shell 200 and depth camera 100.Electronics fills
It can be mobile phone, tablet computer, laptop computer, game machine, head aobvious equipment, access control system, automatic teller machine etc. to set 1000, and the present invention is real
It applies example to illustrate so that electronic device 1000 is mobile phone as an example, it will be understood that the concrete form of electronic device 1000 can be it
He, this is not restricted.The setting of depth camera 100 exposes in shell 200 and from shell 200 to obtain depth image, shell
200 can provide the protection of dust-proof, waterproof, shatter-resistant etc. to depth camera 100, and it is right with depth camera 100 to be offered on shell 200
The hole answered, so that light is pierced by from hole or penetrates shell 200.
Referring to Fig. 2, depth camera 100 includes laser projection module 10, image acquisition device 20 and processor 30.Depth phase
It could be formed with projection window 40 corresponding with laser projection module 10, and acquisition corresponding with image acquisition device 20 on machine 100
Window 50.Laser projection module 10 is used to project laser pattern to object space by projecting window 40, and image acquisition device 20 is used
It is acquired by the modulated laser pattern of subject matter in by acquisition window 50.In one example, laser projection module 10 projects
Laser be infrared light, image acquisition device 20 be infrared camera.Processor 30 and laser projection module 10 and image acquisition device
20 are all connected with, and processor 30 is for handling laser pattern to obtain depth image.Specifically, processor 30 is calculated using images match
Method calculates the deviation value of each pixel corresponding with reference pattern of each pixel in the laser pattern, further according to the deviation
Value further obtains the depth image of the laser pattern.Wherein, image matching algorithm can be digital picture correlation (Digital
Image Correlation, DIC) algorithm.It is of course also possible to use other image matching algorithms replace DIC algorithms.Below will
The structure of laser projection module 10 is described further.
Please refer to Fig. 3 to Fig. 5, laser projection module 10 include board unit 11, lens barrel 12, light source 13, collimating element 14,
Diffraction optical element 15, protection cap 16 and detecting element 19.Light source 13, collimating element 14 and diffraction optical element 15 are set gradually
In the light path of light source 13, specifically, the light that light source 13 is sent out sequentially passes through collimating element 14 and diffraction optical element 15.
Fig. 5 and Fig. 6 are please referred to, board unit 11 includes substrate 111 and the circuit board 112 being carried on substrate 111.Substrate
111 for carrying lens barrel 12, light source 13 and circuit board 112.The material of substrate 111 can be plastics, such as poly terephthalic acid
Glycol ester (Polyethylene Glycol Terephthalate, PET), polymethyl methacrylate (Polymethyl
Methacrylate, PMMA), makrolon (Polycarbonate, PC), in polyimides (Polyimide, PI) at least
It is a kind of.That is, the unitary plastic material that any one in PET, PMMA, PC or PI may be used in substrate 111 is made.Such as
This, 111 lighter weight of substrate and have enough support strengths.
Circuit board 112 can be any one in printed circuit board, flexible PCB, Rigid Flex.Circuit board 112
On can offer via 113, can be used for accommodating light source 13 in via 113, the part of circuit board 112 is covered by lens barrel 12,
Another part extends out and can be connect with connector 17, and laser projection module 10 can be connected to electronics dress by connector 17
It sets on 1000 mainboard.
Fig. 6 to Fig. 8 is please referred to, lens barrel 12 is arranged on board unit 11 and host cavity is collectively formed with board unit 11
121.Specifically, lens barrel 12 can be connect with the circuit board 112 of board unit 11, and lens barrel 12 can be by viscous with circuit board 112
Glue sticking, to improve the air-tightness of host cavity 121.Certainly, lens barrel 12 and the specific connection type of board unit 11 can have it
He, such as by being connected together.Host cavity 121 can be used for accommodating the components such as collimating element 14, diffraction optical element 15, receive
Vessel 121 is formed simultaneously a part for the light path of laser projection module 10.In embodiments of the present invention, lens barrel 12 is in hollow cylinder
Shape, lens barrel 12 include lens barrel side wall 122 and limit protrusion 123.
Lens barrel side wall 122 surrounds host cavity 121, and the outer wall of lens barrel side wall 122 could be formed with positioning and mounting structure, with
Convenient for the position of the fixed laser projection module 10 when laser projection module 10 to be mounted in electronic device 1000.Lens barrel 12 wraps
Opposite the first face 124 and the second face 125 are included, wherein the one of host cavity 121 is opened on the second face 125, another
It is opened on the first face 124.Second face 125 is combined with circuit board 112, such as glued, and the first face 124 can be used as lens barrel
12 and diffraction optical element 15 or protection cap 16 etc. faying face.Incorporated by reference to Fig. 9 and Figure 10, the outer wall of lens barrel side wall 122 opens up
There are glue groove 126, glue groove 126 that can open up from the first face 124 and extend to the direction in the second face 125.
Fig. 8 and Fig. 9 are please referred to, limit protrusion 123 is inwardly projecting from lens barrel side wall 122, and specifically, limit protrusion 123 is certainly
Lens barrel side wall 122 is prominent into host cavity 121.Limit protrusion 123 can be in that continuous cyclic annular or limit protrusion 123 includes
Multiple, multiple limit protrusions 123 are spaced apart.Limit protrusion 123 surrounded unthreaded hole 1231, and receiving can be used as by crossing unthreaded hole 1231
A part for chamber 121, laser penetrated diffraction optical element 15 after passing through unthreaded hole 1231.In the embodiment illustrated in fig. 6, it limits
For position protrusion 123 between the first face 124 and the second face 125, the host cavity 121 between limit protrusion 123 and the second face 125 can
For accommodating collimating element 14, the host cavity 121 between limit protrusion 123 and the first face 124 can be used for accommodating diffraction light
Learn element 15.Meanwhile when assembling laser projection module 10, when diffraction optical element 15 and limit protrusion 123 offset, it can recognize
It is installed in place for diffraction optical element 15, when collimating element 14 and limit protrusion 123 offset, it is believed that collimating element 14 is installed
In place.Limit protrusion 123 includes confined planes 1232, when diffraction optical element 15 is mounted on limit protrusion 123, confined planes
1232 are combined with diffraction optical element 15.
Referring to Fig. 8, light source 13 is arranged on board unit 11, specifically, light source 13 can be arranged on circuit board 112
And be electrically connected with circuit board 112, light source 13 can also be arranged it is on substrate 111 and corresponding with via 113, at this point it is possible to pass through
Light source 13 is electrically connected by arrangement conducting wire with circuit board 112.Light source 13 is for emitting laser, and laser can be infrared light, at one
In example, light source 13 may include the emitting laser of semiconductor substrate and setting on a semiconductor substrate, and semiconductor substrate is set
It sets on substrate 111, emitting laser can be vertical cavity surface emitting laser (Vertical Cavity Surface
Emitting Laser,VCSEL).Single emitting laser can be arranged in semiconductor substrate, can also be arranged and be swashed by multiple transmittings
The array laser of light device composition, specifically, multiple emitting lasers can be with the shape of regularly or irregularly two-dimensional pattern
Formula is arranged on a semiconductor substrate.
Referring to Fig. 8, collimating element 14 can be optical lens, collimating element 14 swashs for what collimated light source 13 emitted
Light, collimating element 14 are housed in host cavity 121, and collimating element 14 can be directed toward the direction group in the first face 124 along the second face 125
It is attached in host cavity 121.Collimating element 14 includes optical section 141 and mounting portion 142, and mounting portion 142 is used for and lens barrel side wall 122
In conjunction with and fixed collimating element 14, in embodiments of the present invention, optical section 141 includes positioned at the two of 14 opposite both sides of collimating element
A curved surface.
Fig. 8 and Fig. 9 are please referred to, diffraction optical element 15 is mounted on limit protrusion 123, specifically, diffraction optical element
15 are combined with confined planes 1232 to be mounted on limit protrusion 123.The outer surface of diffraction optical element 15 includes top surface 151, bottom
Face 152 and side 153.Top surface 151 and bottom surface 152 are opposite, and side 153 connects top surface 151 and bottom surface 152, when diffraction optics member
When part 15 is mounted on limit protrusion 123, bottom surface 152 is combined with confined planes 1232.In the embodiment of the present invention, shape on bottom surface 152
At there is a diffraction structure, top surface 151 can be smooth plane, and diffraction optical element 15 can will be after collimated element 14 collimates
Laser projection goes out laser pattern corresponding with diffraction structure.Diffraction optical element 15 can be made of glass, it may also be said to by multiple
Plastics (such as PET) are closed to be made.
Fig. 8 and Fig. 9 are please referred to, protection cap 16 is combined with lens barrel 12, and protection cap 16 is for diffraction-limited optical element 15
Position, specifically, protection cap 16 after preventing the combination of diffraction optical element 15 and lens barrel 12 from failing from lens barrel 12 for deviating from.
Incorporated by reference to Figure 11, protection cap 16 includes protection roof 161 and protective side wall 162.
Spread out in other words the opposite both sides that protection roof 161 is located at diffraction optical element 15 with limit protrusion 123
It penetrates optical element 15 to be located between limit protrusion 123 and protection roof 161, in this way, even if diffraction optical element 15 and limit convex
It plays 123 combination to fail, due to protecting the restriction effect of roof 161, diffraction optical element 15 will not deviate from.Protect roof
161 offer light hole 1611, and the position of light hole 1611 is corresponding with diffraction optical element 15, and laser successively passed through unthreaded hole
1231, it is projected from laser projection module 10 after diffraction optical element 15 and light hole 1611.In embodiments of the present invention, it protects
The global shape of roof 161 is rounded rectangular, and light hole 1611 can rounded, rectangle, ellipse, the shapes such as trapezoidal.Such as
In embodiment shown in fig. 6, when protection cap 16 is combined with lens barrel 12, protection roof 161 offsets with the first face 124, further
Ground, protection roof 161 can also be combined with the first face 124 by way of gluing etc..
Fig. 9 to Figure 11 is please referred to, the periphery of 162 self-shield roof 161 of protective side wall extends, and protection cap 16 is located at lens barrel
On 12, protective side wall 162 is fixedly connected with lens barrel side wall 122.Protective side wall 162 includes protection that multiple head and the tail connect successively
Side wall 1621, each protects sub- side wall 1621 to be fixedly connected with lens barrel side wall 122, and sub- side wall 1621 is each protected to be respectively formed on
There is dispensing hole 163.The position in dispensing hole 163 is corresponding with the position of glue groove 126, after protection cap 16 is located on lens barrel 12,
Can be after the dispensing into glue groove 126 of dispensing hole 163, glue curing, protective side wall 162 is fixedly connected with lens barrel side wall 122.
In one example, it each protects and offers single dispensing hole 163 on sub- side wall 1621, it is in another example, each to protect
Multiple dispensing holes 163, such as two, three, four etc., in embodiments of the present invention, Mei Gebao are offered on sub- side wall 1621
Protect on sub- side wall 1621 and open up there are two dispensing hole 163, two dispensing holes 163 respectively with two madial walls of glue groove 126
1261 correspond to, and convenient for user to the dispensing simultaneously of the both sides of glue groove 126, improve dispensing speed.Further, glue groove 126
Madial wall 1261 tilts the outer wall of the inner bottom wall 1262 and lens barrel side wall 122 of connection glue groove 126, tilts connection and refers to inside
Wall 1261 and inner bottom wall 1262, the equal out of plumb of outer wall of madial wall 1261 and lens barrel side wall 122, when glue is injected into madial wall
When on 1261, under the guide function of madial wall 1261, glue is easy to flow to the centre position of glue groove 126, accelerates glue
Fill the speed of glue groove 126.
Fig. 6 and Fig. 7 are please referred to, detecting element 19 is embedded in protection roof 162, and can be arranged close to light hole 1611.
In some instances, the lower surface of protection roof 162 can open up the slot position for placing detecting element 19, for placing detecting element
19.In this way, the laser of transmitting may make to be easy to detected.In other examples, protection roof 162, which is selected, can pass through laser
Material so that emitted laser can be detected by being embedded in detecting element 19 therein.The laser that light source 13 is emitted is through spreading out
Preset laser pattern can be scattering by penetrating optical element 15, the detectable irradiation of the detecting element being embedded in protection roof 162
In the light intensity of the laser on its surface, and detection signal is returned to the processor 30 being connected with laser projection module 10, processor
30 judge the working condition of light source 13 according to detection signal, the working condition that is to say light source 13 whether normal transmission, example
If light source 13 has a breakage, detection signal with it is normal when it is different, processor 30 can control light source 13 to be stopped at this time, to prevent brokenly
The laser sent out when damage damages human body.
In some instances, detecting element 19 can be photodiode, and the size of current of photodiode and illumination are strong
Spend related, the stronger internal resistance of light is smaller, by electric current it is also bigger.In use, it is normal to obtain light source 13 in advance before manufacture
The detection signal that photodiode returns when work, such as can be current value, it is pre-stored as standard value.In practical behaviour
When making, when the detection signal that processor 30 obtains is different with standard value, then judge that light source 13 is abnormal, to ensure equipment and user
Safety can close light source, and user is prompted.
To sum up, in the electronic device 1000 of embodiment of the present invention, since protection cap 16 is combined with lens barrel 12, protection cap 16
Protection roof 161 and limit protrusion 123 together diffraction-limited optical element 15 position, diffraction optical element 15 will not be along going out
Light direction falls off, and avoids laser without launching after diffraction optical element 15, protects user, while detecting element passes through
The working condition of the intensity of illumination detection light source of detection transmitting laser, avoids the exception of light source, improves safety.
Referring to Fig. 7, in some embodiments, limit protrusion 123 can also be formed in the top of lens barrel 12, specifically
The confined planes 1232 on ground, limit protrusion 123 can be overlapped with the first face 124, and diffraction optical element 15 is mounted on limit protrusion 123
When upper, diffraction optical element 15 is combined with the first face 124.At this point, protection roof 161 offsets with diffraction optical element 15, protect
Diffraction optical element 15 is clamped with limit protrusion 123 in roof 161 jointly.In this way, the structure of lens barrel 12 is simple, diffraction optical element
15 are easily mounted on limit protrusion 123.
Fig. 9 to Figure 11 is please referred to, in some embodiments, protection cap 16 further includes that self-shield side wall 162 is inwardly projecting
Elasticity the first hook 164, lens barrel 12 further includes the second hook 127 outwardly protruded from the inner bottom wall 1262 of glue groove 126,
When protection cap 16 is located on lens barrel 12, the first hook 164 is engaged with the second hook 127 is detached from lens barrel to limit protection cap 16
12。
Specifically, the first hook 164 is corresponding with the position of the second hook 127, is located on lens barrel 12 by protection cap 16
During, the first hook 164 and the second hook 127 offset and elastic deformation occur, after protection cap 16 is installed in place, first
Hook 164 and the second hook 127 are engaged, and can be with tactile feedback and " clatter " sound being engaged into place.In this way, protection cap 16
Combined with lens barrel 12 it is more reliable, can be first by the first hook 164 and the and before being bonded protection cap 16 and lens barrel 12 with glue
Two hooks 127 are engaged, and the relative position of protection cap 16 and lens barrel 12 can be effectively fixed, and are conducive to progress for dispensing glue.
Fig. 9 to Figure 11 is please referred to, in some embodiments, sub- side wall 1621 is each protected to be respectively formed on the first hook
164.It is corresponding, the second hook 127, the position of the second hook 127 and the first hook 164 are also both provided in multiple glue grooves 126
Correspondence is set, multiple first hooks 164 are engaged simultaneously with corresponding second hook 127, and the combination of protection cap 16 and lens barrel 12 more may be used
It leans on.Specifically, the first hook 164 can be corresponding with the centre position of sub- side wall 1621 is protected, and the second hook 127 can be with appearance glue
The centre position of slot 126 corresponds to.When the sub- side wall of each protection 1621 is formed at least two dispensing holes 163, the first hook 164
Between at least two dispensing holes 163, more specifically, each protecting at least two dispensing holes, 163 phase on sub- side wall 1621
It is symmetrical for the first hook 164.In this way, being flowed respectively in the both sides of the first hook 164 and the second hook 127 convenient for glue
It is dynamic, and the glue quantity of both sides is suitable, cohesive force is more uniform.
Fig. 9 and Figure 11 are please referred to, in some embodiments, protective side wall 162 is in position corresponding with the first hook 164
Offer avoid holes 165.During protection cap 16 is located at lens barrel 12, the first hook 164 and the second hook 127 offset and
When elastic deformation occurs for the first hook 164, avoid holes 165 provide deformation space for the elastic deformation of the first hook 164, that is, the
One hook 164 occurs elastic deformation and stretches into avoid holes 165.Specifically, when the first hook 164 and the second hook 127 offset, the
Elastic deformation occurs outward for one hook 164, and the first hook 164 stretches into avoid holes 165 and moved to avoid with protective side wall 162
Interference, in addition, the mated condition that user observes the first hook 164 and the second hook 127 by avoid holes 165 is also allowed for, such as
Judge whether the first all hooks 164 is good with the occlusion of corresponding second hook 127.
Fig. 9 and Figure 10 are please referred to, in some embodiments, the second hook 127 is formed with guide ramp 1271, along protection
Lid 16 is inserted in the direction of lens barrel 12, and guide ramp 1271 is far from inner bottom wall 1262, during protection cap 16 is located at lens barrel 12,
First hook 164 offsets with guide ramp 1271.Since guide ramp 1271 is tilted relative to inner bottom wall 1262, the first hook
164 and second hook 127 coordinate during, the resist force for the second hook 127 that the first hook 164 is subject to slowly continuously increases
Greatly, the deformation quantity of the first hook 164 also continuously becomes larger, and the first hook 164 is easy to engage with the second hook 127.
Referring to Fig. 9, in some embodiments, the first positioning region 128, diffraction optical element 15 are formed on lens barrel 12
Outer surface on be formed with the second positioning region 154, and if only if the bottom surface of diffraction optical element 15 152 and 123 knot of limit protrusion
When conjunction, the first positioning region 128 and the second positioning region 154 coordinate.It is appreciated that the bottom surface 152 and top surface of diffraction optical element 15
151 structure is different, and bottom surface 152 also differs the effect of laser with top surface 151, when in use, if by diffraction optics member
Part 15 is anti-loaded (top surface 151 is combined with limit protrusion 123), and diffraction optical element 15 goes out the laser pattern of needs by diffraction is unable to,
Laser is even also resulted in concentrate transmitting and be easy the user that burns.First positioning region 128 of present embodiment and the second positioning region
154 only can correctly coordinate when bottom surface 152 is combined with limit protrusion 123, and matching when diffraction optical element 15 and lens barrel 12
When conjunction relationship is not that bottom surface 152 is combined with the confined planes 1232 of limit protrusion 123, the first positioning region 128 and the second positioning region 154
Cannot correctly it coordinate and user is readily appreciated that.In this way, preventing 15 setup error of diffraction optical element.
Referring to Fig. 9, in some embodiments, the first positioning region 128 includes the first chamfering 1281, the first chamfering 1281
It is formed in limit protrusion 123 and 122 intersection of lens barrel side wall, specifically, the first chamfering 1281 is formed in confined planes 1232 and mirror
122 intersection of cylinder side wall.Second positioning region 154 includes the second chamfering 1541, and the second chamfering 1541 is formed in diffraction optical element
15 bottom surface 152 and 153 intersection of side.First chamfering 1281 with the angle of inclination of the second chamfering 1541 can be it is equal,
If being appreciated that user is anti-loaded by diffraction optical element 15, top surface 151 will offset with the second chamfering 1541, lead to diffraction light
Element 15 is padded by the second chamfering 1541, and user is readily appreciated that diffraction optical element 15 is anti-loaded, therefore the first chamfering 1281
It can be anti-loaded to avoid diffraction optical element 15 with the second chamfering 1541.
Please refer to Fig.1 2, in certain embodiments, the first positioning region 128 includes the confined planes being formed on confined planes 1232
Recess 1282, the second positioning region 154 includes the bottom surface convex block 1542 protruded from bottom surface 152, when bottom surface 152 and limit protrusion 123
In conjunction with when, bottom surface convex block 1542 stretch into confined planes recess 1282 in.Specifically, bottom surface convex block 1542 and confined planes recess 1282
Position corresponds to, and bottom surface convex block 1542 is equal with the quantity of confined planes recess 1282, and the shape of bottom surface convex block 1542 can be round
Column, round table-like, prism-shaped etc., it will be understood that if user is anti-loaded by diffraction optical element 15, bottom surface 152 is upward and bottom surface
Out-of-flatness after convex block 1542 makes diffraction optical element 15 install, user are readily appreciated that diffraction optical element 15 is anti-loaded, therefore
Bottom surface convex block 1542 can be anti-loaded to avoid diffraction optical element 15 with confined planes recess 1282.
3 are please referred to Fig.1, in some embodiments, the first positioning region 128 includes the confined planes protruded from confined planes 1232
Convex block 1283, the second positioning region 154 includes the bottom surface recess 1543 for being formed in bottom surface 152, when bottom surface 152 and limit protrusion 123
In conjunction with when, confined planes convex block 1283 stretch into bottom surface recess 1543 in.Specifically, confined planes convex block 1283 and bottom surface recess 1543
Position corresponds to, and confined planes convex block 1283 is equal with the quantity of bottom surface recess 1543, and the shape of confined planes convex block 1283 can be
Cylindric, round table-like, prism-shaped etc., it will be understood that if user is anti-loaded by diffraction optical element 15, confined planes convex block 1283 will
It offsets with bottom surface 152, causing diffraction optical element 15 to be limited, face convex block 1283 is padded, and user is readily appreciated that diffraction optics member
Part 15 is anti-loaded, therefore confined planes convex block 1283 can be anti-loaded to avoid diffraction optical element 15 with bottom surface recess 1543.
4 are please referred to Fig.1, in some embodiments, the first positioning region 128 includes the lens barrel for being formed in lens barrel side wall 122
Recess 1284, the second positioning region 154 include the side convex block 1544 that the side 153 of self-diffraction optical element 15 outwardly protrudes, when
When bottom surface 152 is combined with limit protrusion 123, side convex block 1544 stretches into lens barrel recess 1284.Side convex block 1544 and lens barrel
The position of recess 1284 corresponds to, and side convex block 1544 is equal with the quantity of lens barrel recess 1284, and side convex block 1544 is parallel
In the shape that the plane of bottom surface 152 intercepts can be rectangle, semicircle, triangle, it is trapezoidal, round in it is one or more.It can
To understand, if user is anti-loaded by diffraction optical element 15, side convex block 1544 will offset with lens barrel side wall 122, lead to diffraction
Optical element 15 can not be mounted on limit protrusion 123, and user is readily appreciated that diffraction optical element 15 is anti-loaded, therefore side is convex
Block 1544 can be anti-loaded to avoid diffraction optical element 15 with lens barrel recess 1284.
Specifically, 4 are please referred to Fig.1, in some embodiments, side 153 includes the sub- side that multiple head and the tail connect successively
Face 1531, lens barrel recess 1284 and the quantity of side convex block 1544 are single.Side convex block 1544 is formed in sub- side 1531
Centre position except other positions.That is, when the quantity of side convex block 1544 is one, side convex block 1544 can
With the other positions being opened in except 1531 centre position of sub- side, when preventing user that diffraction optical element 15 is anti-loaded, side
Convex block 1544 still can extend into lens barrel recess 1284 the case where occur, it is anti-loaded to further avoid diffraction optical element 15.
5 are please referred to Fig.1, in some embodiments, lens barrel recess 1284 is equal and equal with the quantity of side convex block 1544
To be multiple, identical, the different side convex block of the shape of the shape of each side convex block 1544 and corresponding lens barrel recess 1284
1544 shape differs.The foreign steamer for referring to side convex block 1544 identical as the shape of lens barrel recess 1284 of side convex block 1544
It is wide identical as the hollow shape of lens barrel recess 1284.In the present embodiment, due to the shape not phase of different side convex blocks 1544
Together, not mutual corresponding side convex block 1544 cannot be fully mated since shape is different from lens barrel recess 1284, and user is easy
Discover whether diffraction optical element 15 is correctly installed.
6 are please referred to Fig.1, in some embodiments, side 153 includes the sub- side 1531 that multiple head and the tail connect successively,
Lens barrel recess 1284 is equal with the quantity of side convex block 1544 and is multiple, and multiple side convex blocks 1544 are not in relation to any one
The centre position of sub- side 1531 is symmetrical.In embodiment as shown in figure 16, diffraction optical element 15 is whole to be square, side
153 include four sub- sides 1531, and the quantity of side convex block 1544 is two and is respectively positioned on a sub- side 1531, two sides
The centre position that face convex block 1544 is not in relation to any one sub- side 1531 is symmetrical.Certainly, side convex block 1544 is in certain sub- side
Quantity on face 1531 can also be one, and side convex block 1544 is also distributed on other sub- sides 1531, but multiple
The centre position that side convex block 1544 is not in relation to any one sub- side 1531 is symmetrical.In this way, when user is intended to diffraction optics member
When part 15 turns installation, at least one side convex block 1544 can offset with lens barrel side wall 122, and user is readily appreciated that diffraction optics
Element 15 is anti-loaded.
6 are please referred to Fig.1, in some embodiments, lens barrel recess 1284 is equal and equal with the quantity of side convex block 1544
To be multiple, multiple non-equiangularly spaced distributions of side convex block 1544.Specifically, when the quantity of side convex block 1544 is two,
Two side convex blocks 1544 are not in respectively 180 degree with the angle of the line at the center of diffraction optical element 15；When side is convex
The quantity of block 1544 be three when, adjacent two side convex blocks 1544 respectively with the line at the center of diffraction optical element 15
Angle is not all in 120 degree.In this way, when user is intended to diffraction optical element 15 turning installation, at least one side is convex
Block 1544 can offset with lens barrel side wall 122, and user is readily appreciated that diffraction optical element 15 is anti-loaded.
7 are please referred to Fig.1, in some embodiments, the direction along top surface 151 to bottom surface 152, the ruler of side convex block 1544
Very little to be gradually reduced, the size of lens barrel recess 1284 is gradually reduced.Further, the full-size of side convex block 1544 is more than lens barrel
The minimum dimension of recess 1284, when user is intended to diffraction optical element 15 turning installation, side convex block 1544 cannot be stretched completely
Enter in lens barrel recess 1284, side convex block 1544 can be padded by diffraction optical element 15, and user is readily appreciated that diffraction optics member
Part 15 is anti-loaded.
8 are please referred to Fig.1, in some embodiments, the first positioning region 128 includes the lens barrel protruded from lens barrel side wall 122
Convex block 1285, the second positioning region 154 includes the side-facing depressions 1545 for being formed in side 153, when bottom surface 152 and limit protrusion 123
In conjunction with when, lens barrel convex block 1285 stretches into side-facing depressions 1545.Lens barrel convex block 1285 is corresponding with the position of side-facing depressions 1545, and
Lens barrel convex block 1285 is equal with the quantity of side-facing depressions 1545, and lens barrel convex block 1285 is parallel to what the plane of bottom surface 152 intercepted
Shape can be rectangle, semicircle, triangle, it is trapezoidal, round in it is one or more.If being appreciated that user by diffraction
Optical element 15 is anti-loaded, and lens barrel convex block 1285 will offset with diffraction optical element 15, cause diffraction optical element 15 that can not install
On limit protrusion 123, user is readily appreciated that diffraction optical element 15 is anti-loaded, therefore lens barrel convex block 1285 and side-facing depressions
1545 can be anti-loaded to avoid diffraction optical element 15.
9 are please referred to Fig.1, in some embodiments, the direction along top surface 151 to bottom surface 152, the ruler of side-facing depressions 1545
Very little gradual increase, the size of lens barrel convex block 1285 gradually increase.Further, the full-size of lens barrel convex block 1285 is more than side
The minimum dimension of recess 1545, when user is intended to diffraction optical element 15 turning installation, lens barrel convex block 1285 cannot be stretched completely
Enter in lens barrel recess 1284, lens barrel convex block 1285 can be padded by diffraction optical element 15, and user is readily appreciated that diffraction optics member
Part 15 is anti-loaded.
Figure 20 is please referred to, in some embodiments, light source 13 includes edge-emitting laser (edge-emitting
Laser, EEL) 131, specifically, edge-emitting laser 131 can be distributed feedback laser (Distributed
Feedback Laser, DFB).Edge-emitting laser 131 is whole to be in the form of a column, and edge-emitting laser 131 is far from board unit 11
One end face is formed with light-emitting surface 1311, and laser is sent out from light-emitting surface 1311, and light-emitting surface 1311 is towards collimating element 14.Using side
Emitting laser 131 is used as light source, and one side edge-emitting laser 131 is smaller compared with the temperature drift of VCSEL array, other direction, by
It is single-point light emitting structure in edge-emitting laser 131, is not necessarily to array of designs structure, makes simple, the light of laser projection module 10
Source cost is relatively low.
Figure 20 and Figure 21 are please referred to, in some embodiments, laser projection module 10 further includes fixing piece 18, fixing piece
18 by edge-emitting laser 131 for being fixed on board unit 11.The laser of distributed feedback laser passes through when propagating
The feedback of optical grating construction obtains the gain of power.The power for improving distributed feedback laser is needed by increasing injection electricity
Stream and/or the length for increasing distributed feedback laser can make the work(of distributed feedback laser due to increasing Injection Current
Consumption increases and serious problem of generating heat occurs, and therefore, in order to ensure that distributed feedback laser can work normally, needs to increase
The length for adding distributed feedback laser causes distributed feedback laser generally in elongate strip structure.Work as edge-emitting laser
When 131 light-emitting surface 1311 is towards collimating element 14, edge-emitting laser 131 is placed in vertical, due to edge-emitting laser 131
In elongate strip structure, edge-emitting laser 131, which is susceptible to, to be fallen, shift or shakes etc. surprisingly, therefore passes through and fixing piece is arranged
18 can fix edge-emitting laser 131, prevent edge-emitting laser 131 fall, shift or shake etc. it is unexpected.
Specifically, Figure 21 is please referred to, in some embodiments, fixing piece 18 includes sealing 181, and the setting of sealing 181 exists
Between edge-emitting laser 131 and board unit 11.More specifically, in example as shown in fig. 13 that, edge-emitting laser 131
Opposite with light-emitting surface 1311 be bonded on one side on board unit 11.In example as shown in figure 22, edge-emitting laser
131 side 1312 can also be bonded on board unit 11, and sealing 181 wraps the side 1312 of surrounding, can also only glue
Tie some face and board unit 11 or certain several face of bonding and the board unit 11 of side 1312.Further, sealing 181 can
Think heat-conducting glue, the heat that the work of light source 13 generates is conducted into board unit 11.In order to improve radiating efficiency, substrate
Heat emission hole 1111 can also be offered on 111, the heat that light source 13 or the work of circuit board 112 generate can be dissipated by heat emission hole 1111
Go out, heat-conducting glue can also be filled in heat emission hole 1111, to further increase the heat dissipation performance of board unit 11.
Figure 23 is please referred to, in some embodiments, fixing piece 18 includes supporting rack 182, and supporting rack 182 is arranged in substrate
On component 11, edge-emitting laser 131 is fixed on supporting rack 182.The quantity of supporting rack 182 can be multiple, multiple supports
Frame 182 can surround edge-emitting laser 131 jointly, when mounted can be directly installed on edge-emitting laser 131 multiple
Between supporting rack 182.In one example, edge-emitting laser 131 is clamped in multiple supporting racks 182 jointly, to further prevent
Edge-emitting laser 131 shakes.
In some embodiments, substrate 111 can save, and light source 13 can be directly anchored on circuit board 112 to subtract
The integral thickness of small laser projection module 10.
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 or example of the present invention.
In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, description
Particular features, structures, materials, or characteristics can be in any one or more embodiments or example with suitable side
Formula 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.In the description of the present invention, the meaning of " plurality " is at least two, such as two,
Three, unless otherwise specifically defined.
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, and the scope of the present invention is limited by claim and its equivalent.
Claims (21)
1. a kind of laser projection module, which is characterized in that including：
Board unit；
Lens barrel, the lens barrel include lens barrel side wall, the lens barrel side wall be arranged on the board unit and with the substrate in batch
Host cavity is collectively formed in part, and the lens barrel includes from the inwardly projecting limit protrusion of the lens barrel side wall；
Light source, the light source are arranged on the board unit and for emitting laser to the host cavity；
Collimating element, the collimating element are housed in the host cavity；
Diffraction optical element, the diffraction optical element be mounted on the limit protrusion on, the light source, the collimating element and
The diffraction optical element is successively set in the light path of the light source；
Protection cap, the protection cap are combined with the lens barrel, and the protection cap includes protection roof, and the protection roof offers
Light hole, the light hole is corresponding with the diffraction optical element, and the diffraction optical element is located at the limit protrusion and institute
It states between protecting roof；With
Detecting element, the detecting element are embedded in the protection roof, the light of the laser for detecting the light source transmitting
According to intensity to detect the working condition of the light source.
2. laser projection module according to claim 1, which is characterized in that the lens barrel includes opposite the first face and
Two faces, second face are combined with the board unit, the limit protrusion between first face and second face,
The protection roof offsets with first face.
3. laser projection module according to claim 1, which is characterized in that the lens barrel includes opposite the first face and
Two faces, second face are combined with the board unit, and first face is overlapped with the upper surface of the limit protrusion, the guarantor
Shield roof offsets with the diffraction optical element.
4. according to laser projection module of the right according to 1-3 any one, which is characterized in that the protection cap further includes certainly
The protective side wall that the periphery of the protection roof extends, the protection cap are located on the lens barrel, the protective side wall and institute
Lens barrel side wall is stated to be fixedly connected.
5. laser projection module according to claim 4, which is characterized in that the outer wall of the lens barrel side wall offers appearance glue
Slot, protective side wall position corresponding with the glue groove offer dispensing hole, with allow glue by the dispensing hole into
Enter the glue groove.
6. laser projection module according to claim 5, which is characterized in that the inside in the dispensing hole and the glue groove
Wall corresponds to, and the madial wall tilts the outer wall of the inner bottom wall and the lens barrel side wall that connect the glue groove.
7. laser projection module according to claim 5, which is characterized in that the protection cap further includes from the protection side
First hook of the inwardly projecting elasticity of wall, the lens barrel further include the second card outwardly protruded from the inner bottom wall of the glue groove
It hooks, when the protection cap is located on the lens barrel, first hook engages with second hook.
8. laser projection module according to claim 7, which is characterized in that the protective side wall with first hook
Corresponding position offers avoid holes, and the avoid holes are used for during the protection cap is located at the lens barrel, described
First hook offsets with second hook and first hook occurs to provide deformation space when elastic deformation.
9. laser projection module according to claim 7, which is characterized in that second hook is formed with guide ramp,
The direction of the lens barrel is inserted in along the protection cap, the guide ramp is gradually distance from the inner bottom wall, and the protection cap is provide with
During the lens barrel, first hook offsets with the guide ramp.
10. laser projection module according to claim 7, which is characterized in that the protective side wall include multiple head and the tail according to
The secondary sub- side wall of the protection to connect, each sub- side wall of protection have been respectively formed on first hook and the dispensing hole.
11. laser projection module according to claim 10, which is characterized in that at least shape on each sub- side wall of protection
At there are two dispensing holes, first hook is between at least two dispensing holes.
12. laser projection module according to claim 11, which is characterized in that first hook is located at corresponding described
The centre position of sub- side wall is protected, at least two dispensing holes on each sub- side wall of protection are relative to first card
It hooks symmetrical.
13. laser projection module according to claim 1, which is characterized in that the limit protrusion is in continuous cyclic annular；Or
The limit protrusion includes multiple, and multiple limit protrusions are spaced apart.
14. laser projection module according to claim 1, which is characterized in that the light source includes edge-emitting laser, institute
It includes light-emitting surface to state edge-emitting laser, and the light-emitting surface is towards the collimating element.
15. laser projection module according to claim 14, 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.
16. laser projection module according to claim 15, which is characterized in that the fixing piece includes sealing, the envelope
Glue is arranged between the edge-emitting laser and the board unit, and the sealing is heat-conducting glue.
17. laser projection module according to claim 15, which is characterized in that the fixing piece includes supporting rack, described
Supporting rack is arranged on the board unit, and the edge-emitting laser is fixed on support frame as described above.
18. laser projection module according to claim 1, which is characterized in that the detecting element includes photodiode.
19. a kind of depth camera, which is characterized in that including：
Laser projection module described in claim 1-18 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；With
The processor being connect respectively with the laser projection module and described image collector, the processor are described for handling
Laser pattern is to obtain depth image.
20. depth camera according to claim 19, which is characterized in that the processor is additionally operable to according to detection member
The detection signal of part judges the working condition of the laser projection module to control the light source transmitting of the laser projecting apparatus or close
It closes.
21. a kind of electronic device, which is characterized in that including：
Shell；With
Depth camera described in claim 19 or 20, the depth camera are arranged in the shell and are exposed from the shell
To obtain depth image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810161930.3A CN108388067A (en) | 2018-02-27 | 2018-02-27 | Laser projection module, depth camera and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810161930.3A CN108388067A (en) | 2018-02-27 | 2018-02-27 | Laser projection module, depth camera and electronic device |
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| Publication Number | Publication Date |
|---|---|
| CN108388067A true CN108388067A (en) | 2018-08-10 |
Family
ID=63069772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810161930.3A Pending CN108388067A (en) | 2018-02-27 | 2018-02-27 | Laser projection module, depth camera and electronic device |
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| CN109061879A (en) * | 2018-08-22 | 2018-12-21 | Oppo广东移动通信有限公司 | Light projector and its detection method of rupture, depth camera and electronic device |
| CN109870866A (en) * | 2019-04-16 | 2019-06-11 | 业成科技（成都）有限公司 | Light source safe device |
| WO2019165853A1 (en) * | 2018-02-27 | 2019-09-06 | Oppo广东移动通信有限公司 | Laser projection module, depth camera and electronic device |
| CN113423544A (en) * | 2020-01-09 | 2021-09-21 | 鸿富锦精密工业(武汉)有限公司 | Fastening device |
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