CN108507761A - Laser projection module and its detection method and device, depth camera and electronic device - Google Patents
Laser projection module and its detection method and device, depth camera and electronic device Download PDFInfo
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- CN108507761A CN108507761A CN201810201758.XA CN201810201758A CN108507761A CN 108507761 A CN108507761 A CN 108507761A CN 201810201758 A CN201810201758 A CN 201810201758A CN 108507761 A CN108507761 A CN 108507761A
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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Abstract
The present invention discloses a kind of detection method of laser projection module.Laser projection module is for projecting laser pattern.Detection method includes：Obtain the laser pattern；Judge in the laser pattern with the presence or absence of default mark；Determine that the laser projection module is abnormal with when the default mark being not present in the laser pattern.Invention additionally discloses a kind of laser projection module and its detection device, depth camera and electronic devices.The laser projection module and its detection method, detection device, depth camera and electronic device of the present invention determines whether laser projection module is abnormal according in laser pattern with the presence or absence of default mark, so as to close laser projection module in laser projection module exception or reduce the transmission power of laser projection module, to avoid harm users.
Description
Technical field
The present invention relates to technical field of imaging, more particularly to a kind of detection method of laser projection module, laser projection mould
Detection device, laser projection module, depth camera and the electronic device of group.
Background technology
Depth camera emits laser using the light source of laser projection module, to assist infrared camera to obtain structure light figure
Picture.Under normal circumstances, by optical system (such as collimating element, diffraction optical element), energy declines the laser of light source transmitting afterwards
Subtract, human body will not be damaged.However, optical system is usually made of glass or other frangible components, fallen once encountering
Situations such as falling, optical system rupture or occurs other abnormal cases, and laser will be emitted directly, irradiate user body or
The problem of eyes cause serious safety problem, and how to determine laser projection module extremely be this field urgent need to resolve.
Invention content
Embodiment of the present invention provide a kind of detection method of laser projection module, the detection device of laser projection module,
Laser projection module, depth camera and electronic device.
The detection method of the laser projection module of embodiment of the present invention is used for laser projection module, the laser projection
For projecting laser pattern, the detection method includes module：
Obtain the laser pattern；
Judge in the laser pattern with the presence or absence of default mark；With
Determine that the laser projection module is abnormal when the default mark being not present in the laser pattern.
The detection device of the laser projection module of embodiment of the present invention is used for laser projection module, the laser projection
For projecting laser pattern, the detection device includes module：
Acquisition module, the acquisition module is for obtaining the laser pattern；
Judgment module, the judgment module is for judging in the laser pattern with the presence or absence of default mark；With
Determining module, when the determining module is used to that the default mark to be not present in the laser pattern described in determination
Laser projection module is abnormal.
The laser projection module of embodiment of the present invention includes：
Diffraction optical element, the diffraction optical element is for diffracted laser to form laser pattern；
Processor, the processor is for obtaining the laser pattern, judging in the laser pattern with the presence or absence of default
It identifies and determines that the diffraction optical element is abnormal when the default mark being not present in the laser pattern.
The depth camera of embodiment of the present invention includes above-mentioned laser projection module and image acquisition device.Described image acquires
Device is for acquiring the laser pattern projected into object space after the diffraction optical element.
The electronic device of embodiment of the present invention includes shell and above-mentioned depth camera, and the depth camera is arranged described
It is exposed on shell and from the shell to obtain the laser pattern.
The detection method of laser projection module of embodiment of the present invention, the detection device of laser projection module, laser are thrown
Module, depth camera and electronic device are penetrated, is to determine laser projection module with the presence or absence of default mark according in laser pattern
No exception, so as to close laser projection module in laser projection module exception or reduce the transmitting work(of laser projection module
Rate, and then the body or eyes that avoid the energy of the laser of laser projection module transmitting excessively high and to user generate asking for harm
Topic improves the safety of laser projection module used.
The additional aspect and advantage of embodiment of the present invention will be set forth in part in the description, partly will be from following
Become apparent in description, 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 to Fig. 4 is the structural schematic diagram of the laser projection module of certain embodiments of the present invention；
Fig. 5 is the flow diagram of the detection method of the laser projection module of certain embodiments of the present invention；
Fig. 6 is the schematic diagram of the detection device of the laser projection module of certain embodiments of the present invention；
Fig. 7 is the schematic diagram of the laser projection module of certain embodiments of the present invention；
Fig. 8 is the flow diagram of the detection method of the laser projection module of certain embodiments of the present invention；
Fig. 9 and Figure 10 is the schematic diagram of the laser pattern of certain embodiments of the present invention；
Figure 11 is the flow diagram of the detection method of the laser projection module of certain embodiments of the present invention；
Figure 12 is the schematic diagram of the laser pattern of certain embodiments of the present invention；
Figure 13 is the structural schematic diagram of the depth camera of certain embodiments of the present invention；
Figure 14 is the floor map of the electronic device of certain embodiments of the present invention.
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.
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.
Referring to Fig. 1, laser projection module 10 includes board unit 11, lens barrel 12, light source 13, collimating element 14 and diffraction
Optical element 15.Light source 13, collimating element 14 and diffraction optical element 15 are successively set 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.
Board unit 11 includes substrate 111 and the circuit board 112 being carried on substrate 111.Substrate 111 is for carrying lens barrel
12, light source 13 and circuit board 112.The material of substrate 111 can be plastics, such as polyethylene terephthalate
(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 other electricity by connector 17
In subcomponent (such as on mainboard of electronic device 1000 shown in Figure 14).
Lens barrel 12 is arranged on board unit 11 and host cavity 121 is collectively formed with board unit 11.Specifically, lens barrel 12
It can be connect with the circuit board 112 of board unit 11, lens barrel 12 can be bonded by viscose glue with circuit board 112, to improve receiving
The air-tightness of chamber 121.Certainly, lens barrel 12 and the specific connection type of board unit 11 can have other, such as be connected by engaging
It connects.Host cavity 121 can be used for accommodating components, the host cavities 121 such as collimating element 14, diffraction optical element 15 and be formed simultaneously sharp
A part for the light path of light projection module 10.In embodiments of the present invention, lens barrel 12 is in hollow tubular, and lens barrel 12 includes 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 location structure and installation is tied
Structure, in order to the installation (such as precalculated position in electronic device 1000) of laser projection module 10.Lens barrel 12 includes
Opposite the first face 124 and the second face 125, wherein the one of host cavity 121 are opened on the second face 125, another is opened
Mouth is opened on the first face 124.Second face 125 is combined with circuit board 112, such as glued.
Please continue to refer to Fig. 1, limit protrusion 123 is inwardly projecting from lens barrel side wall 122, and specifically, limit protrusion 123 is from mirror
Cylinder side wall 122 is prominent into host cavity 121.Limit protrusion 123 can be in that continuous cyclic annular or limit protrusion 123 includes more
A, multiple limit protrusions 123 are spaced apart.Limit protrusion 123 surrounded unthreaded hole 1231, and host cavity can be used as by crossing unthreaded hole 1231
121 part, laser penetrated diffraction optical element 15 after passing through unthreaded hole 1231.Limit protrusion 123 includes the first confined planes
1232 and second confined planes 1233, the first confined planes 1232 it is opposite with the second confined planes 1233.Specifically, limit protrusion 123
Between the first face 124 and the second face 125, the first confined planes 1232 compared with the second confined planes 1233 closer to the first face 124, first
Confined planes 1232 and the second confined planes 1233 can be parallel planes.Receipts between first confined planes 1232 and the first face 124
Vessel 121 can be used for accommodating diffraction optical element 15, and the host cavity 121 between the second confined planes 1233 and the second face 125 can
For accommodating collimating element 14.
Light source 13 is arranged on board unit 11, and specifically, light source 13 can be arranged on circuit board 112 and and circuit board
112 electrical connections, light source 13 can also be arranged on substrate 111 and be housed in via 113, at this point it is possible to by arranging conducting wire
Light source 13 is electrically connected with circuit board 112.For light source 13 for emitting laser, laser can be infrared light, in one example, light
Source 13 may include the emitting laser of semiconductor substrate and setting on a semiconductor substrate, and semiconductor substrate is arranged in substrate
On 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 made of multiple emitting lasers
Array laser, specifically, multiple emitting lasers can be arranged in the form of regularly or irregularly two-dimensional pattern
In semiconductor substrate.
Collimating element 14 can be optical lens, and collimating element 14 is used for the laser that collimated light source 13 emits, collimating element
14 are housed in host cavity 121, and the direction that collimating element 14 can be directed toward the first face 124 along the second face 125 is assembled into host cavity
In 121, specifically, collimating element 14 includes faying face 143 can recognize when faying face 143 is combined with the second confined planes 1233
It is installed in place for collimating element 14.Collimating element 14 includes optical section 141 and mounting portion 142, and mounting portion 142 is used for and lens barrel side
Wall 122 combines so that collimating element 14 is fixed in host cavity 121, and in embodiments of the present invention, faying face 143 is mounting portion
142 end face, optical section 141 include two curved surfaces positioned at 14 opposite both sides of collimating element.Collimating element 14 is wherein
One curved surface stretched into unthreaded hole 1231.
Diffraction optical element 15 is mounted on limit protrusion 123, and specifically, diffraction optical element 15 includes mounting surface 151,
Mounting surface 151 is combined with the first confined planes 1232 diffraction optical element 15 to be mounted on limit protrusion 123.Wherein mounting surface
Some regions on 151 could be formed with diffraction structure, and diffraction structure can be corresponding with the position of unthreaded hole 1231 is crossed and will be through standard
Laser diffraction after straight element 14 collimates goes out laser pattern corresponding with diffraction structure, and other regions on mounting surface 151
It can be plane and be combined with the first confined planes 1232.Diffraction optical element 15 can be made of glass, it may also be said to by compound
Plastics (such as PET) are made.
Please continue to refer to Fig. 1, in some embodiments, laser projection module 10 further includes protective cover 16, protective cover 16
It is arranged on the first face 124.The one side opposite with mounting surface 151 of diffraction optical element 15 is contradicted with protective cover 16.In diffraction
Optical element 15 installs protective cover 16 after being mounted on limit protrusion 123, so as to prevent diffraction optical element 15 from falling off.It protects
Shield 16 can be made of translucent material, for example, glass, polymethyl methacrylate (Polymethyl Methacrylate,
PMMA), makrolon (Polycarbonate, PC), polyimides (Polyimide, PI) etc..Due to glass, PMMA, PC and
The translucent materials such as PI all have excellent light transmission, and protective cover 16 can not have to open up loophole.In this way, protective cover 16 can
While preventing diffraction optical element 15 from falling off, additionally it is possible to avoid diffraction optical element 15 exposed in the outside of lens barrel 12, from
And it realizes to 15 water proof and dust proof of diffraction optical element.Certainly, in other embodiments, protective cover 16 can offer light transmission
Hole, loophole are opposite with the optics effective district of diffraction optical element 15 to avoid blocking the light path of diffraction optical element 15.
It please refers to Fig.1 and Fig. 2, 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.
Fig. 2 and Fig. 3 are please referred to, in some embodiments, laser projection module 10 further includes fixing piece 18, fixing piece 18
For edge-emitting laser 131 to be fixed on board unit 11.The laser of distributed feedback laser is when propagating, by light
The feedback of grid structure obtains the gain of power.The power for improving distributed feedback laser is needed by increasing Injection Current
And/or increase the length of distributed feedback laser, it can make the power consumption of distributed feedback laser due to increasing Injection Current
Increase and serious problem of generating heat occur, therefore, in order to ensure that distributed feedback laser can work normally, needs to increase
The length of distributed feedback laser causes distributed feedback laser generally in elongate strip structure.When edge-emitting laser 131
Light-emitting surface 1311 towards collimating element 14 when, edge-emitting laser 131 is placed in vertical, since edge-emitting laser 131 is 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 18 is arranged
Edge-emitting laser 131 can be fixed, prevent edge-emitting laser 131 fall, shift or shake etc. it is unexpected.
Specifically, referring to Fig. 2, in some embodiments, fixing piece 18 includes sealing 181, sealing 181 is arranged on side
Between emitting laser 131 and board unit 11.More specifically, in the example as shown in fig. 2, edge-emitting laser 131
Opposite with light-emitting surface 1311 is bonded on one side on board unit 11.In the example illustrated in fig. 3, edge-emitting laser 131
Side 1312 can also be bonded on board unit 11, sealing 181 wraps the side 1312 of surrounding, can also only adherent side
Some face in face 1312 and board unit 11 or certain several face of bonding and board unit 11.Further, sealing 181 can be
Heat-conducting glue conducts the heat that the work of light source 13 generates into board unit 11.In order to improve radiating efficiency, on substrate 111
Heat emission hole 1111 can also be offered, the heat that light source 13 or the work of circuit board 112 generate can be shed by heat emission hole 1111, be dissipated
Heat-conducting glue can also be filled in hot hole 1111, to further increase the heat dissipation performance of board unit 11.
Referring to Fig. 4, in some embodiments, fixing piece 18 includes at least two bullets being arranged on board unit 11
Property supporting rack 182, at least two supporting racks 182 are collectively formed receiving space 183, and receiving space 183 swashs for accommodating edge emitting
Light device 131, at least two supporting racks 182 are used to support edge-emitting laser 131, to further prevent edge-emitting laser
131 shake.
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 projecting apparatus 10.
It please refers to Fig.1 and Fig. 5, the detection method of laser projection module 10 can be used for laser projection module 10, laser is thrown
It can be the laser projection module 10 of any one of the above embodiment or the laser projection module of the prior art, inspection to penetrate module 10
Survey method includes：
Step 02：Obtain laser pattern；
Step 04：Judge in laser pattern with the presence or absence of default mark；With
Step 06：There is no determine that diffraction optical element 15 is abnormal when default mark in laser pattern.
It please refers to Fig.1 and Fig. 6, the detection device 60 of laser projection module 10 can be used for laser projection module 10, laser
Projection module 10 can be the laser projection module 10 of any one of the above embodiment or the laser projection module of the prior art,
Detection device 60 includes acquisition module 62, judgment module 64 and determining module 66.Acquisition module 62 is for obtaining laser pattern.Sentence
Disconnected module 64 is for judging in laser pattern with the presence or absence of default mark.Determining module 66 is used to be not present in laser pattern pre-
Bidding determines that diffraction optical element 15 is abnormal when knowing.
In other words, the detection method of the laser projection module 10 of embodiment of the present invention can be by embodiment of the present invention
The detection device 60 of laser projection module 10 realize, wherein step 02 can realize by acquisition module 62, and step 04 can be by
Judgment module 64 realizes that step 06 can be realized by determining module 66.
In some embodiments, detection device 60 can refer to application program (APP).
Referring to Fig. 7, in some embodiments, detection device 60 can be finger processor 30, processor 30 can answer
For the laser projection module 10 of any one of the above embodiment or the laser projection module of the prior art, in other words laser throwing
It includes processor 30 to penetrate module 10.Processor 30 for obtain laser pattern, judge in laser pattern with the presence or absence of it is default identify,
And there is no determine that diffraction optical element 15 is abnormal when default mark in laser pattern.
In other words, the detection method of the laser projection module 10 of embodiment of the present invention can be by embodiment of the present invention
Laser projection module 10 realize, wherein step 02, step 04 and step 06 can be realized by processor 30.
The detection method of the laser projection module 10 of embodiment of the present invention, 60 and of detection device of laser projection module 10
Laser projection module 10 determines whether diffraction optical element 15 is abnormal according in laser pattern with the presence or absence of default mark, to
Laser projection module 10 can be closed when diffraction optical element 15 is abnormal or reduce the transmission power of laser projection module 10, into
And avoid the problem that the excessively high and body to user of the energy for the laser that laser projection module 10 emits or eyes generation endanger, and carry
The safety of high laser projection module 10 used.
Specifically, the laser pattern that laser projection module 10 projects is laser by being formed after diffraction optical element 15,
The shape of laser pattern is determined by the diffraction structure of diffraction optical element 15.When diffraction optical element 15 is normal, laser passes through
Normal diffraction structure so that laser pattern is predetermined shape, there is default mark in laser pattern, wherein default mark can be with
It is the marks such as predetermined point in laser pattern, line, pattern (such as round, triangle).It is abnormal in diffraction optical element 15
When (such as be crushed, tilt, fall off), diffraction structure may change, and cause laser pattern is equally possible to change, in advance
Bidding, which is known, to disappear.Therefore, it is possible to judge that with the presence or absence of default mark in laser pattern, exist in laser pattern default
When mark, illustrate that diffraction optical element 15 is normal；There is no when default mark in laser pattern, illustrate diffraction optical element 15
It is abnormal.It should be noted that when diffraction optical element 15 is abnormal, laser projection module 10 is abnormal.
In some embodiments, laser pattern may deform after the modulation of object, in laser pattern
There are when default mark, default mark still can identify.
In some embodiments, laser projection module 10 can be by laser projection to plane, in this way, the laser obtained
Pattern will not deform substantially, and default mark is subsequently judged whether to convenient.
In some embodiments, determine that diffraction optical element 15 is normal when there is default mark in laser pattern, it can
To reenter step 02.
Referring to Fig. 8, in some embodiments, step 04 includes：
Step 042：Judge in each frame laser pattern with the presence or absence of default mark；
Step 06 includes：
Step 062：There is no determine that diffraction optical element 15 is abnormal when default mark in any one frame laser pattern.
Referring to Fig. 6, in some embodiments, judgment module 64 for judge in each frame laser pattern whether
There are default marks.Determining module 66 is used to determine diffraction optics member when default mark being not present in any one frame laser pattern
Part 15 is abnormal.
Referring to Fig. 7, in some embodiments, processor 30 is for judging whether deposited in each frame laser pattern
In default mark and in any one frame laser pattern, there is no determine that diffraction optical element 15 is abnormal when default mark.
In other words, step 042 can be realized that step 062 can be by determining module by judgment module 64 or processor 30
66 or processor 30 realize.
By judging to identify with the presence or absence of default in each frame laser pattern, can detection of diffracted optical element 15 be in real time
No exception further increases sharp to close laser projection module 10 in real time or reduce the transmission power of laser projection module 10
The safety that light projection module 10 uses.
There is no determining that diffraction optical element 15 is abnormal when default mark in any one frame laser pattern, in this way, can be with
Quickly determine whether diffraction optical element 15 is abnormal, further improves the safety that laser projection module 10 uses.
In some embodiments, there is no determine diffraction light when default mark in the laser pattern of continuous default frame number
It is abnormal to learn element 15.In this way, can be reduced or avoided to the whether abnormal erroneous judgement of diffraction optical element 15.
Specifically, default frame number can be stored in advance in laser projection module 10 or is configured by user, preset frame
Number for example, 3 frames, 5 frames, 10 frames etc., is not specifically limited herein.For example, if default frame number is 3 frames, only meet continuous 3 frame
It just determines that diffraction optical element 15 is abnormal when default mark is all not present in laser pattern, and there are 2 frames to swash in continuous 3 frame laser pattern
There is no default marks for light pattern, when remaining 1 frame laser pattern has default mark, it is determined that diffraction optical element 15 is normal.
Referring to Fig. 9, in some embodiments, default to be identified as individually, single default mark can reduce detection and fill
Set 60 or processor 30 judge with the presence or absence of the workload needed for default mark in laser pattern, to quickly determine diffraction light
Whether abnormal learn element 15.
0 and Figure 11 are please referred to Fig.1, in some embodiments, default to be identified as multiple, step 04 includes：
Step 044：Judge to whether there is multiple default marks in laser pattern；
Step 06 includes：
Step 064：Determine that diffraction optical element 15 is abnormal in the absence of at least one default mark in laser pattern.
Fig. 6 and Figure 10 are please referred to, in some embodiments, default to be identified as multiple, judgment module 64 is for judging to swash
It whether there is multiple default marks in light pattern；Determining module 66 is used at least one default mark in laser pattern and is not present
When determine that diffraction optical element 15 is abnormal.
Fig. 7 and Figure 10 are please referred to, in some embodiments, default to be identified as multiple, processor 30 is for judging laser
Determine diffraction optics in pattern in the absence of at least one default mark with the presence or absence of multiple default marks and in laser pattern
Element 15 is abnormal.
In other words, step 044 can be realized that step 064 can be by determining module by judgment module 64 or processor 30
66 or processor 30 realize.
Multiple default marks may be at multiple positions in laser pattern, so as to detection of diffracted optical element 15
Multiple regions judge whether diffraction optical element 15 is abnormal more fully hereinafter, and raising judges whether diffraction optical element 15 is abnormal
Accuracy.
Specifically, preset be identified as it is multiple, it can be understood as, preset mark quantity be two or more.Scheming
In 10 example, the quantity for presetting mark is 4.
Determine that diffraction optical element 15 is abnormal in the absence of at least one default mark in laser pattern, it is possible to understand that
For, determine that diffraction optical element 15 is abnormal in the absence of a default mark in laser pattern, or in laser pattern it is multiple
Determine that diffraction optical element 15 is abnormal in the absence of default mark.In one embodiment, the quantity for presetting mark is 4,
It can't detect default mark in laser pattern, then 4 default marks are not present, it may be determined that diffraction optical element 15 is abnormal.
In another embodiment, the quantity of default mark is 4, and 3 default marks are detected in laser pattern, then are preset for 1
Mark is not present, and can also determine that diffraction optical element 15 is abnormal.In yet another embodiment, the quantity for presetting mark is 4,
4 default marks are detected in laser pattern, then all default marks all exist, it may be determined that diffraction optical element 15 is just
Often.
Fig. 9, Figure 10 and Figure 12 are please referred to, in some embodiments, presets mark positioned at at least one of laser pattern
Corner or edge.Default mark positioned at corner or edge can more accurately judge that diffraction optical element 15 is
No exception.
Specifically, when assembling diffraction optical element 15, the fringe region of diffraction optical element 15 is generally and installation site
It contradicts, therefore when diffraction optical element 15 is acted on by external force, stress that the fringe region of diffraction optical element 15 is subject to
Larger, the fringe region of diffraction optical element 15 is easier to be crushed.The fringe region and laser pattern of diffraction optical element 15
Corner or edge correspond to, therefore when the fringe region of diffraction optical element 15 is broken, be located at the corner of laser pattern
The default mark of place or edge can accurately be known.
In some embodiments, the corner of laser pattern or edge can refer in laser pattern with laser pattern
Center distance be more than pre-determined distance region.
Please continue to refer to Fig. 9 and Figure 10, laser pattern is rectangular, and the corner of laser pattern can refer to four angles of rectangle
It falls, the edge of laser pattern can refer to top edge, lower edge, left hand edge and the right hand edge of rectangle.
2 are please referred to Fig.1, laser pattern is rounded, and the edge of laser pattern can refer to fringe region in a ring.
Certainly, laser pattern can also be in other shapes, and default mark be also disposed at the laser pattern in other shapes
Corner or edge.
In some embodiments, at least one corner or edge of the mark positioned at laser pattern, Ke Yili are preset
Xie Wei presets a corner or edge of the mark positioned at laser pattern, or default mark positioned at multiple angles of laser pattern
Fall place or edge.
Fig. 9 and Figure 12 are please referred to, in one embodiment, default to be identified as individually, single default mark is located at laser figure
One corner of case or edge.
Referring to Fig. 10, in another embodiment, it is default to be identified as multiple (they being, for example, 4), multiple default flags
In multiple corners of laser pattern or edge (such as 4 default marks are positioned at four corners of laser pattern).
Certainly, in other embodiments, default mark can also be located at laser pattern in addition to corner and edge
Other positions, such as positioned at the center of laser pattern, be not specifically limited herein.
3 are please referred to Fig.1, depth camera 100 includes the laser projection module 10 and image of any one of the above embodiment
Collector 20.It could be formed with projection window 40 corresponding with laser projection module 10, and and Image Acquisition on depth camera 100
20 corresponding acquisition window 50 of device.Laser projection module 10 is used to project laser pattern to object space by projecting window 40,
Image acquisition device 20 is used to acquire laser pattern by acquisition window 50.In one example, laser projection module 10 projects
Laser is infrared light, and image acquisition device 20 is infrared camera.
In some embodiments, detection device 60 or processor 30 obtain laser pattern, it can be understood as, detection device
60 or processor 30 obtain the laser pattern that is acquired by image acquisition device 20.
4 are please referred to Fig.1, the electronic device 1000 of embodiment of the present invention includes the depth of any one of the above embodiment
Camera 100 and shell 200.Electronic device 1000 can be mobile phone, tablet computer, laptop computer, game machine, the aobvious equipment of head, door
Access control system, automatic teller machine etc., this is not restricted.The setting of depth camera 100 exposes in shell 200 and from shell 200 to obtain
Laser pattern, shell 200 can provide the protections such as dust-proof, waterproof, shatter-resistant to depth camera 100, be offered on shell 200 and deep
100 corresponding hole of camera is spent, so that light is pierced by from hole or penetrates shell 200.
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 (19)
1. a kind of detection method of laser projection module, which is characterized in that the laser projection module is used to project laser pattern,
The detection method includes：
Obtain the laser pattern；
Judge in the laser pattern with the presence or absence of default mark；With
Determine that the laser projection module is abnormal when the default mark being not present in the laser pattern.
2. the detection method of laser projection module according to claim 1, which is characterized in that described to judge the laser figure
Include with the presence or absence of the step of default mark in case：
Judge in laser pattern described in each frame with the presence or absence of default mark；
It is described that there is no the step packets that the laser projection module exception is determined when the default mark in the laser pattern
It includes：
Determine that the laser projection module is abnormal when the default mark being not present in the laser pattern described in any one frame.
3. the detection method of laser projection module according to claim 1, which is characterized in that it is described it is default be identified as it is more
It is a, it is described to judge that the step of whether there is default mark in the laser pattern includes：
Judge to whether there is multiple default marks in the laser pattern；
It is described that there is no the step packets that the laser projection module exception is determined when the default mark in the laser pattern
It includes：
Determine that the laser projection module is abnormal in the absence of at least one default mark in the laser pattern.
4. the detection method of laser projection module according to claim 1, which is characterized in that the default mark is located at institute
State at least one corner or the edge of laser pattern.
5. a kind of detection device of laser projection module, which is characterized in that the laser projection module is used to project laser pattern,
The detection device includes：
Acquisition module, the acquisition module is for obtaining the laser pattern；
Judgment module, the judgment module is for judging in the laser pattern with the presence or absence of default mark；With
Determining module, the determining module are used to determine the laser when the default mark being not present in the laser pattern
It is abnormal to project module.
6. the detection device of laser projection module according to claim 5, which is characterized in that the judgment module is for sentencing
With the presence or absence of default mark in laser pattern described in disconnected each frame；The determining module is used for the laser pattern described in any one frame
In determine that the laser projection module is abnormal when the default mark is not present.
7. the detection device of laser projection module according to claim 5, which is characterized in that it is described it is default be identified as it is more
A, the judgment module whether there is multiple default marks for judging in the laser pattern；The determining module is used
Determine that the laser projection module is abnormal in the absence of at least one default mark in the laser pattern.
8. the detection device of laser projection module according to claim 5, which is characterized in that the default mark is located at institute
State at least one corner or the edge of laser pattern.
9. a kind of laser projection module, which is characterized in that including：
Diffraction optical element, the diffraction optical element is for diffracted laser to form laser pattern；
Processor, the processor for obtain the laser pattern, judge in the laser pattern with the presence or absence of it is default identify,
And determine that the diffraction optical element is abnormal when the default mark being not present in the laser pattern.
10. laser projection module according to claim 9, which is characterized in that the processor is for judging each frame institute
It states in laser pattern with the presence or absence of there is no true when the default mark in default mark and the laser pattern described in any one frame
The fixed diffraction optical element is abnormal.
11. laser projection module according to claim 9, which is characterized in that described preset is identified as multiple, the processing
Device is for judging in the laser pattern with the presence or absence of multiple default marks and at least one institute in the laser pattern
The determining diffraction optical element is abnormal in the absence of stating default mark.
12. laser projection module according to claim 9, which is characterized in that the default mark is located at the laser figure
At least one corner of case or edge.
13. laser projection module according to claim 9, which is characterized in that the laser projection module include light source and
Collimating element, the light source is for emitting the laser, and the collimating element is for collimating the laser, the diffraction optics member
Part is for the laser after collimating element collimation described in diffraction to form the laser pattern.
14. laser projection module according to claim 13, which is characterized in that the light source includes edge-emitting laser,
The edge-emitting laser includes light-emitting surface, 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 substrate
Component and fixing piece, 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 being arranged in the base
Receiving space, the receiving space is collectively formed at least two flexible supporting frames on board group part, at least two support frames as described above
For accommodating the edge-emitting laser, at least two support frames as described above are used to support residence and state edge-emitting laser.
18. a kind of depth camera, which is characterized in that including：
Laser projection module described in claim 9-17 any one；With
Image acquisition device, described image collector is for acquiring the institute projected into object space after the diffraction optical element
State laser pattern.
19. a kind of electronic device, which is characterized in that including：
Shell；With
Depth camera described in claim 18, the depth camera are arranged in the shell and are exposed from the shell to obtain
Take the laser pattern.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810201758.XA CN108507761B (en) | 2018-03-12 | 2018-03-12 | Laser projection module, detection method and device thereof, depth camera and electronic device |
| PCT/CN2019/076076 WO2019174455A1 (en) | 2018-03-12 | 2019-02-25 | Laser projection module and detection method and apparatus therefor, and depth camera module and electronic apparatus |
| EP19725915.3A EP3561574A4 (en) | 2018-03-12 | 2019-02-25 | Laser projection module and detection method and apparatus therefor, and depth camera module and electronic apparatus |
| US16/683,983 US11563930B2 (en) | 2018-03-12 | 2019-11-14 | Laser projection component, detection method thereof, and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810201758.XA CN108507761B (en) | 2018-03-12 | 2018-03-12 | Laser projection module, detection method and device thereof, depth camera and electronic device |
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| CN108507761A true CN108507761A (en) | 2018-09-07 |
| CN108507761B CN108507761B (en) | 2020-01-10 |
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