CN108303835A - Structured light projector and its control method, depth camera and electronic device - Google Patents
Structured light projector and its control method, depth camera and electronic device Download PDFInfo
- Publication number
- CN108303835A CN108303835A CN201810162450.9A CN201810162450A CN108303835A CN 108303835 A CN108303835 A CN 108303835A CN 201810162450 A CN201810162450 A CN 201810162450A CN 108303835 A CN108303835 A CN 108303835A
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- China
- Prior art keywords
- structured light
- optical element
- light projector
- diffraction
- laser
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Classifications
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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
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/4233—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive element [DOE] contributing to a non-imaging application
- G02B27/425—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive element [DOE] contributing to a non-imaging application in illumination systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
Abstract
The present invention discloses a kind of structured light projector.Structured light projector includes laser emitter, collimating element, diffraction optical element and the extension of light transmission film.Laser emitter is for emitting laser.Collimating element is used for collimation laser.Diffraction optical element is for the laser after diffraction collimating element collimation to form laser pattern.Extension film is arranged on diffraction optical element and is combined with diffraction optical element, and extension film provides cohesive force when diffraction optical element is ruptured to diffraction optical element.Invention additionally discloses a kind of control method of structured light projector, depth camera and electronic devices.The structured light projector of embodiment of the present invention, the control method of structured light projector, depth camera and electronic device utilize the extension film combination diffraction optical element of light transmission, to when diffraction optical element ruptures, the cohesive force that extension film provides can make diffraction optical element not divide, so that diffraction optical element remains to reduce the energy of laser, reduces laser and human body is damaged.
Description
Technical field
The present invention relates to optical technical field, more particularly to a kind of structured light projector, the controlling party of structured light projector
Method, depth camera and electronic device.
Background technology
Structure light video camera head emits laser using Infrared laser emission device, to assist infrared camera to obtain structure light figure
Picture.The laser of Infrared laser emission device transmitting passes through diffraction optical element (diffractive optical elements, DOE)
Energy attenuation afterwards, to avoid harm to the human body.However, since diffraction optical element is easier to be crushed, so may
So that Infrared laser emission device transmitting laser direct projection human body, especially carry out face unlock when can direct projection people eyes, it is right
User causes greatly to injure.
Invention content
The embodiment provides a kind of structured light projector, the control method of structured light projector, depth cameras
And electronic device.
The structured light projector of embodiment of the present invention includes：
Laser emitter, the laser emitter is for emitting laser；
Collimating element, the collimating element is for collimating the laser；
Diffraction optical element, laser of the diffraction optical element for after collimating element collimation described in diffraction are sharp to be formed
Light pattern；With
The extension film of light transmission, the extension film setting are on the diffraction optical element and first with the diffraction optics
Part combines, and the extension film provides cohesive force when the diffraction optical element is ruptured to the diffraction optical element.
The control method of the structured light projector of embodiment of the present invention includes：
Emit the laser to form the laser pattern；
Structure light image is obtained, the structure light image is formed by acquiring the laser pattern；
The structure light image is handled to judge whether the structure light image abnormal spot occurs；With
The structured light projector operation irregularity is determined when the abnormal spot occurs in the structure light image.
The depth camera of embodiment of the present invention includes：
The structured light projector；With
Image acquisition device, described image collector are used to acquire to be projected into object space from the structured light projector
The laser pattern.
The electronic device of embodiment of the present invention includes：
Shell；With
The depth camera, the depth camera installation are exposed to obtain the knot on the housing and from the shell
Structure light image.
The structured light projector of embodiment of the present invention, the control method of structured light projector, depth camera and electronics dress
The extension film combination diffraction optical element using light transmission is set, thus when diffraction optical element ruptures, what extension film provided
Cohesive force can make diffraction optical element not divide, so that diffraction optical element remains to reduce the energy of laser, reduce
Laser damages human body.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention can be from the description in conjunction with following accompanying drawings to embodiment
It will be apparent and be readily appreciated that, wherein：
Fig. 1 is the structural schematic diagram of the structured light projector of certain embodiments of the present invention.
Fig. 2 is the structural schematic diagram of the structured light projector of certain embodiments of the present invention.
Fig. 3 is the structural schematic diagram of the structured light projector of certain embodiments of the present invention.
Fig. 4 is the structural schematic diagram of the structured light projector of certain embodiments of the present invention.
Fig. 5 is the floor map of the extension film of certain embodiments of the present invention.
Fig. 6 is the floor map of the extension film of certain embodiments of the present invention.
Fig. 7 is the structural schematic diagram of the depth camera of certain embodiments of the present invention.
Fig. 8 is the flow diagram of the control method of the structured light projector of certain embodiments of the present invention.
Fig. 9 is the flow diagram of the control method of the structured light projector of certain embodiments of the present invention.
Figure 10 is the flow diagram of the control method of the structured light projector of certain embodiments of the present invention.
Figure 11 is the flow diagram of the control method of the structured light projector of certain embodiments of the present invention.
Figure 12 is the flow diagram of the control method of the structured light projector of certain embodiments of the present invention.
Figure 13 is the floor map of the electronic device of certain embodiments of the present invention.
Main element symbol description：
Electronic device 1000, shell 100, depth camera 200, structured light projector 220, laser emitter 221, collimation member
Part 222, mounting portion 2224, collimated incident face 2226, collimation exit facet 2228, diffraction optical element 223, spreads out at optical section 2222
Penetrate the plane of incidence 2232, diffraction exit facet 2234, extension film 224, barrel assembly 225, host cavity 2252, lens barrel 2254, roof
2254A, peripheral wall 2254B, light hole 2254C, protective cover 2256, light through-hole 2256A, baffle 2256B, side wall 2256C, resistance surface
2258, board unit 226, substrate 2262, circuit board 2264, glue 227, processor 228, image acquisition device 240.
Specific implementation mode
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein identical
Or similar label indicates same or similar element or element with the same or similar functions from beginning to end.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining embodiments of the present invention, and should not be understood as to this hair
The limitation of bright embodiment.
In the description of embodiments of the present invention, it is to be understood that term "center", " longitudinal direction ", " transverse direction ", " length
Degree ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner",
The orientation or positional relationship of the instructions such as "outside", " clockwise ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, only
It is embodiments of the present invention and simplified description for ease of description, does not indicate or imply the indicated device or element is necessary
With specific orientation, with specific azimuth configuration and operation, therefore should not be understood as the limitation to embodiments of the present invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance or implicit
Indicate the quantity of indicated technical characteristic." first " is defined as a result, the feature of " second " can be expressed or impliedly wrap
Include one or more feature.In the description of embodiments of the present invention, the meaning of " plurality " is two or two
More than, unless otherwise specifically defined.
In the description of embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, term
" installation ", " connection ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, can also be to be electrically connected or can mutually communicate；Can be directly connected to, can also lead to
It crosses intermediary to be indirectly connected with, can be the interaction relationship of the connection or two elements inside two elements.For ability
For the those of ordinary skill in domain, it can understand that above-mentioned term in embodiments of the present invention specific contains as the case may be
Justice.
In embodiments of the present invention unless specifically defined or limited otherwise, fisrt feature second feature it
"upper" or "lower" may include that the first and second features are in direct contact, can also include the first and second features not be directly to connect
It touches but passes through the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " on
Face " includes fisrt feature right over second feature and oblique upper, or to be merely representative of fisrt feature level height special higher than second
Sign.Fisrt feature second feature " under ", " lower section " and " below " include fisrt feature immediately below second feature and obliquely downward
Side, or be merely representative of fisrt feature level height and be less than second feature.
Following disclosure provides many different embodiments or example is used for realizing embodiments of the present invention not
Same structure.In order to simplify the disclosure of embodiments of the present invention, hereinafter the component of specific examples and setting are described.When
So, they are merely examples, and is not intended to limit the present invention.In addition, embodiments of the present invention can be in different examples
Repeat reference numerals and/or reference letter in son, this repetition are for purposes of simplicity and clarity, itself not indicate to be begged for
By the relationship between various embodiments and/or setting.In addition, the various specific techniques that embodiments of the present invention provide
With the example of material, but make those of ordinary skill in the art may realize that the application of other techniques and/or other materials
With.
- 4 are please referred to Fig.1, the structured light projector 220 of embodiment of the present invention includes laser emitter 221, collimating element
222, the extension film 224 of diffraction optical element 223 and light transmission.Laser emitter 221 is for emitting laser.Collimating element 222
For collimation laser.Diffraction optical element 223 is for the laser after the collimation of diffraction collimating element 222 to form laser pattern.Prolong
Exhibition film 224 is arranged on diffraction optical element 223 and is combined with diffraction optical element 223, and extension film 224 is in diffraction optics
When element 223 ruptures cohesive force is provided to diffraction optical element 223.
The structured light projector 220 of embodiment of the present invention combines diffraction optical element using the extension film 224 of light transmission
223, to which when diffraction optical element 223 ruptures, the cohesive force that extension film 224 provides can make diffraction optical element
223 do not divide, so that diffraction optical element 223 remains to reduce the energy of laser, reduce laser and are damaged to human body.
In some embodiments, laser emitter 221 includes vertical cavity surface emitting laser (Vertical-Cavity
Surface-Emitting Laser, VCSEL) or distributed feedback laser (Distributed Feedback Laser,
DFB).The extension film 224 of light transmission can refer to that the light transmittance of extension film 224 is more than or equal to 80%.
In some embodiments, extension film 224 is to have sticking plastic film or rubber film.
In this way, extension film 224 is less likely to be damaged when structured light projector 220 is dropped, hit, remain to
Normal work, the diffraction optical element 223 so as to rupture are clung, and are avoided diffraction optical element 223 from splitting off and are come.
Specifically, extension film 224 can have viscosity, such as extension film 224 can also be optical cement.Utilize optical cement
The characteristics such as high transparency, high ductibility (not allowing easily rupturable), high viscosity can not influence 220 normal work of structured light projector
In the case of work so that diffraction optical element 223 will not scatter when being ruptured by external force.
Fig. 2-4 is please referred to, in some embodiments, diffraction optical element 223 includes the opposite diffraction plane of incidence 2232
With diffraction exit facet 2234, extension film 224 is located on the diffraction plane of incidence 2232 and/or diffraction exit facet 2234.
In this way, the size of extension film 224 can be reduced, to reduce the material needed for extension film 224.
Specifically, extension film 224 is located at the diffraction plane of incidence 2232 and/or diffraction exit facet 2234, it can be understood as, prolong
Exhibition film 224 is located on the diffraction plane of incidence 2232 or extension film 224 is located on diffraction exit facet 2234 or extension film 224
Simultaneously on the diffraction plane of incidence 2232 and on diffraction exit facet 2234.Extension film 224 be located on the diffraction plane of incidence 2232 or
When on diffraction exit facet 2234, the size of extension film 224 greatly reduces, 224 required material of manufacture extension film
It reduces, to reduce the manufacturing cost of extension film 224.Extension film 224 goes out positioned at the diffraction plane of incidence 2232 and diffraction simultaneously
When penetrating on face 2234, the diffraction plane of incidence 2232 and diffraction exit facet 2234 can be protected simultaneously, it is broken in diffraction optical element 223
More preferably cohesive force is capable of providing when splitting, to improve safety.
Fig. 5 and Fig. 6 are please referred to, in some embodiments, extension film 224 at least partly covers the diffraction plane of incidence 2232
And/or on diffraction exit facet 2234.
In this way, the size of extension film 224 can be further decreased, to reduce the material needed for extension film 224.
Specifically, extension film 224 at least partly covers on the diffraction plane of incidence 2232 and/or diffraction exit facet 2234, can
To be interpreted as, on 224 part of the extension film covering diffraction plane of incidence 2232 or the diffraction plane of incidence is completely covered in extension film 224
On on 2232 or 224 part of extension film covering diffraction exit facet 2234 or diffraction exit facet is completely covered in extension film 224
On 2234 or 224 part of extension film covers on the diffraction plane of incidence 2232 and part covers on diffraction exit facet 2234, or extends
On 224 part of the film covering diffraction plane of incidence 2232 and it is completely covered on diffraction exit facet 2234 or 224 part of extension film is covered
On lid diffraction exit facet 2234 and it is completely covered on the diffraction plane of incidence 2232 or diffraction exit facet is completely covered in extension film 224
On 2234 and it is completely covered on the diffraction plane of incidence 2232.
On 224 part of the extension film covering diffraction plane of incidence 2232 or 224 part of extension film covers diffraction exit facet
On 2234 or 224 part of extension film covers on the diffraction plane of incidence 2232 and part covers on diffraction exit facet 2234, or extends
On 224 part of the film covering diffraction plane of incidence 2232 and it is completely covered on diffraction exit facet 2234 or 224 part of extension film is covered
When on lid diffraction exit facet 2234 and being completely covered on the diffraction plane of incidence 2232, the size of extension film 224 further decreases, system
It makes 224 required material of extension film to be further reduced, to further decrease the manufacturing cost of extension film 224.
When extension film 224 is completely covered on the diffraction plane of incidence 2232 or diffraction exit facet is completely covered in extension film 224
It, can on 2234 or when extension film 224 is completely covered on diffraction exit facet 2234 and is completely covered on the diffraction plane of incidence 2232
The diffraction plane of incidence 2232 and diffraction exit facet 2234 are more fully protected, is capable of providing when diffraction optical element 223 ruptures
More preferably cohesive force, to improve safety.
It should be noted that when 224 part of the extension film covering diffraction plane of incidence 2232 and/or diffraction exit facet 2234,
The shape that part covers corresponding extension film 224 can be configured according to actual conditions.For example, diffraction can be determined according to experiment
Which region of the plane of incidence 2232 and diffraction exit facet 2234 is easier to rupture, to according to the region system for being easier rupture
Extension film 224 is made, to protect crackly region using extension film 224.
Referring to Fig. 5, in one embodiment, since the corner location of diffraction optical element 223 is easier out
The situation now ruptured, therefore extension film 224 can be arranged to each corner location in diffraction optical element 223.
Referring to Fig. 1, in some embodiments, extension film 224 wraps up entire diffraction optical element 223, i.e.,
Each surface of the fully wrapped around firmly diffraction optical element 223 of extension film 224, each surface includes：The diffraction plane of incidence 2232 spreads out
It penetrates exit facet 2234 and connects whole sides of the diffraction plane of incidence 2232 and diffraction exit facet 2234.
In this way, extension film 224 may further ensure that diffraction optical element 223 does not divide.
Specifically, extension film 224 can be with fully wrapped around diffraction optical element 223, in this way, even if diffraction optical element
223 ruptures, extension film 224 enable to diffraction optical element 223 to keep original state substantially, you can so that diffraction optical element
223 do not spread out.
In some embodiments, the refractive index of extension film 224 and the difference of the refractive index of diffraction optical element 223 are small
In 0.1.
In this way, the formation of laser pattern can be destroyed to avoid extension film 224.
Specifically, the refractive index of diffraction optical element 223 is generally 1.3-1.7, if the refractive index of extension film 224 with spread out
The difference for penetrating the refractive index of optical element 223 is excessive, is greater than 0.1, then laser is by extension film 224 and diffraction optics member
When the interface of part 223, it is susceptible to the refraction of larger angle, so that the direction of laser generates larger variation, in turn
Destroy the formation of laser pattern.Therefore the difference of the refractive index of the refractive index and diffraction optical element 223 of extension film 224 needs
Less than 0.1, so structured light projector 220 can be enable to work normally.
In some embodiments, the refractive index of extension film 224 is identical as the refractive index of diffraction optical element 223.
Referring again to Fig. 1-4, in some embodiments, the structured light projector 220 of embodiment of the present invention can also wrap
Barrel assembly 225 and board unit 226 are included, the setting of barrel assembly 225 is on board unit 226 and common with board unit 226
Form host cavity 2252.Board unit 226 includes substrate 2262 and the circuit board 2264 being carried on substrate 2262.Barrel assembly
225 include lens barrel 2254 and protective cover 2256.Lens barrel 2254 includes roof 2254A and the week from the roof 2254A annulars extended
Wall 2254B, peripheral wall 2254B are arranged on board unit 226, and roof 2254A offers the light hole being connected to host cavity 2252
2254C.Protective cover 2256 is arranged on roof 2254A.Protective cover 2256 includes the baffle for offering light extraction through-hole 2256A
The 2256B and annular sidewall 2256C extended from baffle 2256B.Diffraction optical element 223 is carried on roof 2254A and accommodates
In protective cover 2256.The opposite both sides of diffraction optical element 223 are contradicted with protective cover 2256 and roof 2254A respectively, baffle
2256B includes the resistance surface 2258 close to light hole 2254C, and diffraction optical element 223 is contradicted with resistance surface 2258.
Specifically, diffraction optical element 223 includes opposite the diffraction plane of incidence 2232 and diffraction exit facet 2234.Diffraction light
It learns element 223 to be carried on roof 2254A, the surface of the close light hole 2254C of diffraction exit facet 2234 and baffle 2256B
(resistance surface 2258) contradicts, and the diffraction plane of incidence 2232 is contradicted with roof 2254A.Light hole 2254C is aligned with host cavity 2252, is gone out
Light through-hole 2256A is aligned with light hole 2254C.Roof 2254A, side wall 2256C and baffle 2256B and diffraction optical element 223
It contradicts, to prevent diffraction optical element 223 from falling off out of protective cover 2256 along light direction.In some embodiments, it protects
Shield 2256 is pasted onto by glue 227 on roof 2254A.
Please continue to refer to Fig. 1-4, in some embodiments, collimating element 222 is including optical section 2222 and around optics
The mounting portion 2224 that portion 2222 is arranged, collimating element 222 include positioned at the collimated incident face 2226 of 222 opposite both sides of collimating element
With collimation exit facet 2228, optical section 2222 include two be located at 222 opposite both sides of collimating element curved surfaces, mounting portion 2224 with
Roof 2254A is contradicted, and one of optical section 2222 curved surface stretches into light hole 2254C.
When assembling above-mentioned structured light projector 220, along light path from the bottom end of the peripheral wall 2254B of barrel assembly 225
Collimating element 222 is put into host cavity 2252 successively and installs the board unit 226 of laser emitter 221.Laser emission
Device 221 can be first mounted on board unit 226, then will be equipped with again the board unit 226 of laser emitter 221 together with
Barrel assembly 225 combines.Diffraction optical element 223 is carried on roof 2254A against the direction of light path, then by protective cover
2256 are mounted on roof 2254A, to make diffraction optical element 223 be housed in protective cover 2256.In this way, project structured light
Device 220 is installed simply.In other embodiments, first diffraction optical element 223 can also be reversed and is arranged in protective cover 2256
It is interior, then diffraction optical element 223 and protective cover 2256 are installed along on roof 2254A again.At this point, diffraction optical element
223 diffraction exit facet 2234 is contradicted with resistance surface 2258, and the diffraction plane of incidence 2232 is contradicted with roof 2254A and and optical section
2222 collimation exit facet 2228 is opposite, and the collimated incident face 2226 of optical section 2222 is opposite with laser emitter 221.In this way,
The installation of structured light projector 220 is simpler.
Referring to Fig. 7, the depth camera 200 of embodiment of the present invention includes the structure light of any one of the above embodiment
The projector 220 and image acquisition device 240.Image acquisition device 240 is thrown from structured light projector 220 into object space for acquiring
The laser pattern penetrated.
The depth camera 200 of embodiment of the present invention combines diffraction optical element 223 using the extension film 224 of light transmission,
To which when diffraction optical element 223 ruptures, the cohesive force that extension film 224 provides can make diffraction optical element 223 not
Division reduces laser and is damaged to human body so that diffraction optical element 223 remains to reduce the energy of laser.
In some embodiments, image acquisition device 240 can be infrared camera.
Referring to Fig. 8, the control method of embodiment of the present invention structured light projector 220 includes：
Step 01：Emit laser to form laser pattern；
Step 02：Structure light image is obtained, structure light image is formed by acquiring laser pattern；
Step 03：Processing structure light image is to judge whether structure light image abnormal spot occurs；With
Step 04：220 operation irregularity of structured light projector is determined when abnormal spot occurs in structure light image.
Referring to Fig. 1, in some embodiments, structured light projector 220 may also include processor 228.Processing
Device 228 is used for：
Structure light image is obtained, structure light image is formed by acquiring laser pattern；
Processing structure light image is to judge whether structure light image abnormal spot occurs；With
220 operation irregularity of structured light projector is determined when abnormal spot occurs in structure light image.
Referring to Fig. 7, in some embodiments, depth camera 200 further includes and structured light projector 220 and figure
As the processor 228 that collector 240 connects, processor 228 is used for：
Structure light image is obtained, structure light image is formed by acquiring laser pattern；
Processing structure light image is to judge whether structure light image abnormal spot occurs；With
220 operation irregularity of structured light projector is determined when abnormal spot occurs in structure light image.
In other words, the control method of embodiment of the present invention can be by the structured light projector of embodiment of the present invention
220 or the depth camera 200 of embodiment of the present invention realize, wherein step 01 can realize by structured light projector 220, walk
Rapid 02, step 03 and step 04 can be realized by processor 228.
Structured light projector 220, the control method of structured light projector and the depth camera 200 of embodiment of the present invention can
With according to structure light image judge structured light projector 200 whether operation irregularity, such as when diffraction optical element 223 ruptures,
After the diffraction of diffraction optical element 223 by rupture, laser pattern generally will appear abnormal spot, therefore can be in structure light
Image occurs determining 220 operation irregularity of structured light projector when abnormal spot, so as to accurately judge structured light projector
200 whether operation irregularity.
The structure light image of embodiment of the present invention can be acquired by image acquisition device 240 by structured light projector 220
The laser pattern projected into object space obtains, and the structure light image that the acquisition of image acquisition device 240 obtains can be by wired
The mode of communication and/or wireless communication is transmitted to processor 228, to which processor 228 can obtain structure light image.
Referring to Fig. 9, in some embodiments, control method includes：
Step 05：Judge whether structured light projector 220 is triggered；
01 is entered step when structured light projector 220 is triggered.
In some embodiments, processor 228 is for judging whether structured light projector 220 is triggered and in structure light
The projector 220 enters the step of transmitting laser is to form laser pattern when being triggered.
In other words, step 05 can be realized by processor 228.
In this way, can rapidly judge structured light projector 220 whether operation irregularity.
Specifically, judge whether structured light projector 220 is triggered, when structured light projector 220 is triggered, illustrate to tie
Structure light projector 220 is started to work, and the first frame structure light image after being started to work according to structured light projector 220 judges
Structured light projector 220 whether operation irregularity, if 220 operation irregularity of structured light projector, can take counter-measure in time,
To reduce the power consumption of structured light projector 220 or avoid the occurrence of safety accident.
In some embodiments, when structured light projector 220 is not triggered, control method reenters step 05,
Rejudge whether structured light projector 220 is triggered, to when structured light projector 220 is triggered can it is accurate and
When find.
Referring to Fig. 10, in some embodiments, including after step 03：
Step 06：Determine that structured light projector 220 is working properly when structure light image abnormal spot does not occur.
In some embodiments, processor 228 is used to determine structure light when structure light image abnormal spot does not occur
The projector 220 is working properly.
In other words, step 06 can be realized by processor 228.
In this way, structured light projector 220 can work normally.
Specifically, when structure light image abnormal spot does not occur, structured light projector 220 is working properly, therefore structure
Light projector 220 can be worked normally to coordinate image acquisition device 240 to acquire structure light image.
1 is please referred to Fig.1, in some embodiments, when abnormal spot occurs in structure light image, control method includes：
Step 07：Closing structure light projector 220 or the transmission power for reducing laser emitter 221.
In some embodiments, processor 228 is used for the closing structure light throwing when abnormal spot occurs in structure light image
Emitter 220 or the transmission power for reducing laser emitter 221.
In other words, step 07 can be realized by processor 228.
In this way, the power consumption of structured light projector 220 can be reduced, and reduces laser and human body is damaged.
Specifically, when abnormal spot occurs in structure light image, 220 operation irregularity of structured light projector, therefore can be straight
It connects and closes structured light projector 220, structured light projector 220 is avoided to consume more energy, and avoid the occurrence of laser wound
The problem of victimization body.
In some embodiments, when abnormal spot occurs in structure light image, although structured light projector 220 work it is different
Often, but it is usually that exception occurs in the corresponding region of abnormal spot, and other regions remain to work normally, therefore can reduce sharp
The transmission power of optical transmitting set 221 so that structured light projector 220 remains to work.Since abnormal spot may cause human body
Injury, therefore the transmission power of laser emitter 221 can be reduced.
2 are please referred to Fig.1, in some embodiments, when abnormal spot occurs in structure light image, control method includes：
Step 08：Prompt user.
In some embodiments, processor 228 is used to prompt user when abnormal spot occurs in structure light image.
In other words, step 08 can be realized by processor 228.
In this way, can user be prompted so that user knows that abnormal spot occurs in structure light image.
Specifically, electronic device 1000 includes at least one of display screen, electroacoustic component (such as loudspeaker) and vibrating motor.
Processor 228 can prompt user by least one of control display screen, electroacoustic component and vibrating motor, wherein showing
Screen can show that image, text information, electroacoustic component can make a sound information, and vibrating motor can be prompted by vibration information
User.Processor 228 can prompt user by display screen, or prompt user by electroacoustic component, or be carried by vibrating motor
Show user, or user is prompted by display screen and electroacoustic component, or user is prompted by display screen and vibrating motor, or passes through electricity
Sound component and vibrating motor prompt user, or prompt user by display screen, electroacoustic component and vibrating motor, do not do herein specific
It limits.
It should be noted that the processor 228 of any one of the above embodiment can be applied to structured light projector 220
Or depth camera 200, in other words, structured light projector 220 or depth camera 200 include the place of any one of the above embodiment
Manage device 228.
3 are please referred to Fig.1, the electronic device 1000 of embodiment of the present invention includes that shell 100 and any one of the above are implemented
The depth camera 200 of mode.Depth camera 200 is mounted on shell 100 and is exposed from shell 100 to obtain structure light image.
The electronic device 1000 of embodiment of the present invention combines diffraction optical element 223 using the extension film 224 of light transmission,
To which when diffraction optical element 223 ruptures, the cohesive force that extension film 224 provides can make diffraction optical element 223 not
Division reduces laser and is damaged to human body so that diffraction optical element 223 remains to reduce the energy of laser.
In some embodiments, electronic device 1000 includes mobile phone, tablet computer, laptop, Intelligent bracelet, intelligence
Energy wrist-watch, intelligent helmet, intelligent glasses etc..
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", " specific example " or " some examples " etc. means the tool described in conjunction with the embodiment or example
Body characteristics, structure, material or feature 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, the specific features of description, knot
Structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discuss suitable
Sequence, include according to involved function by it is basic simultaneously in the way of or in the opposite order, to execute function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (system of such as computer based system including processing module or other can be from instruction
Execute system, device or equipment instruction fetch and the system that executes instruction) use, or combine these instruction execution systems, device or
Equipment and use.For the purpose of this specification, " computer-readable medium " can be it is any can include, store, communicating, propagating or
Transmission program uses for instruction execution system, device or equipment or in conjunction with these instruction execution systems, device or equipment
Device.The more specific example (non-exhaustive list) of computer-readable medium includes following：With one or more wiring
Electrical connection section (IPM current foldback circuits), portable computer diskette box (magnetic device), random access memory (RAM) are read-only to deposit
Reservoir (ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk are only
Read memory (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other conjunctions
Suitable medium, because can be for example by carrying out optical scanner to paper or other media, then into edlin, interpretation or when necessary
It is handled with other suitable methods electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of embodiments of the present invention can be with hardware, software, firmware or combination thereof come real
It is existing.In the above-described embodiment, multiple steps or method can use storage in memory and by suitable instruction execution system
The software or firmware of execution is realized.For example, if realized with hardware, in another embodiment, ability can be used
Any one of following technology or their combination well known to domain are realized：With for realizing logic function to data-signal
The discrete logic of logic gates, the application-specific integrated circuit with suitable combinational logic gate circuit, programmable gate array
(PGA), field programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that realize all or part of step that above-described embodiment method carries
Suddenly it is that relevant hardware can be instructed to complete by program, the program can be stored in a kind of computer-readable storage medium
In matter, which includes the steps that one or a combination set of embodiment of the method when being executed.
In addition, each functional unit in various embodiments of the present invention can be integrated in a processing module, also may be used
To be that each unit physically exists alone, can also two or more units be integrated in a module.It is above-mentioned integrated
The form that hardware had both may be used in module is realized, can also be realized in the form of software function module.The integrated module
If being realized in the form of software function module and when sold or used as an independent product, a calculating can also be stored in
In machine read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiment is
Illustratively, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be right
The above embodiment is changed, changes, replacing and modification.
Claims (15)
1. a kind of structured light projector, which is characterized in that including：
Laser emitter, the laser emitter is for emitting laser；
Collimating element, the collimating element is for collimating the laser；
Diffraction optical element, the diffraction optical element is for the laser after collimating element collimation described in diffraction to form laser figure
Case；With
The extension film of light transmission, the extension film be arranged on the diffraction optical element and with the diffraction optical element knot
It closes, the extension film provides cohesive force when the diffraction optical element is ruptured to the diffraction optical element.
2. structured light projector according to claim 1, which is characterized in that the extension film is plastic film or rubber
Film.
3. structured light projector according to claim 1, which is characterized in that the diffraction optical element includes opposite spreads out
The plane of incidence and diffraction exit facet are penetrated, the extension film is located on the diffraction plane of incidence and/or the diffraction exit facet.
4. structured light projector according to claim 3, which is characterized in that described in the extension film at least partly covers
On the diffraction plane of incidence and/or the diffraction exit facet.
5. structured light projector according to claim 1, which is characterized in that the extension film wraps up the diffraction optics
Element.
6. structured light projector according to claim 1, which is characterized in that the refractive index of the extension film is spread out with described
The difference for penetrating the refractive index of optical element is less than 0.1.
7. according to the structured light projector described in claim 1-6 any one, which is characterized in that the structured light projector packet
Processor is included, the processor is used for：
Structure light image is obtained, the structure light image is formed by acquiring the laser pattern；
The structure light image is handled to judge whether the structure light image abnormal spot occurs；With
The structured light projector operation irregularity is determined when the abnormal spot occurs in the structure light image.
8. a kind of control method of structured light projector as claimed in any one of claims 1 to 6, which is characterized in that the control
Method processed includes：
Emit the laser to form the laser pattern；
Structure light image is obtained, the structure light image is formed by acquiring the laser pattern；
The structure light image is handled to judge whether the structure light image abnormal spot occurs；With
The structured light projector operation irregularity is determined when the abnormal spot occurs in the structure light image.
9. control method according to claim 8, which is characterized in that the control method includes：
Judge whether the structured light projector is triggered；
Enter the step of transmitting laser is to form the laser pattern when the structured light projector is triggered.
10. control method according to claim 8, which is characterized in that in the processing structure light image to judge
The structure light image includes after whether there is the step of abnormal spot：
Determine that the structured light projector is working properly when the abnormal spot does not occur in the structure light image.
11. control method according to claim 8, which is characterized in that the abnormal spot occur in the structure light image
When point, the control method includes：
It closes the structured light projector or reduces the transmission power of the laser emitter.
12. control method according to claim 8, which is characterized in that the abnormal spot occur in the structure light image
When point, the control method includes：
Prompt user.
13. a kind of depth camera, which is characterized in that including：
Structured light projector described in claim 1-6 any one；With
Image acquisition device, described image collector is for described in acquiring and being projected into object space from the structured light projector
Laser pattern.
14. depth camera according to claim 13, which is characterized in that the depth camera further includes and the structure light
The projector and the processor of described image collector connection, the processor are used for：
Structure light image is obtained, the structure light image is formed by acquiring the laser pattern；
The structure light image is handled to judge whether the structure light image abnormal spot occurs；With
The structured light projector operation irregularity is determined when the abnormal spot occurs in the structure light image.
15. a kind of electronic device, which is characterized in that including：
Shell；With
Depth camera described in claim 13 or 14, the depth camera installation expose on the housing and from the shell
To obtain the structure light image.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810162450.9A CN108303835B (en) | 2018-02-27 | 2018-02-27 | Structured light projector, method of controlling structured light projector, depth camera, and electronic apparatus |
| CN202110271504.7A CN113156742B (en) | 2018-02-27 | 2018-02-27 | Structured light projector, method of controlling structured light projector, depth camera, and electronic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810162450.9A CN108303835B (en) | 2018-02-27 | 2018-02-27 | Structured light projector, method of controlling structured light projector, depth camera, and electronic apparatus |
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| CN202110271504.7A Division CN113156742B (en) | 2018-02-27 | 2018-02-27 | Structured light projector, method of controlling structured light projector, depth camera, and electronic apparatus |
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| CN201810162450.9A Active CN108303835B (en) | 2018-02-27 | 2018-02-27 | Structured light projector, method of controlling structured light projector, depth camera, and electronic apparatus |
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| CN109218588A (en) * | 2018-10-31 | 2019-01-15 | Oppo广东移动通信有限公司 | Image acquiring method, image acquiring device, structure optical assembly and electronic device |
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| EP3919964A4 (en) * | 2019-02-01 | 2022-11-02 | Hangzhou Uphoton Optoelectronics Technology Co., Ltd. | Light projection method and light projection device |
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| CN113156742B (en) * | 2018-02-27 | 2022-05-20 | Oppo广东移动通信有限公司 | Structured light projector, method of controlling structured light projector, depth camera, and electronic apparatus |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113156742A (en) | 2021-07-23 |
| CN108303835B (en) | 2021-04-09 |
| CN113156742B (en) | 2022-05-20 |
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