CN109443696A - A kind of detection method - Google Patents
A kind of detection method Download PDFInfo
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- CN109443696A CN109443696A CN201811070123.7A CN201811070123A CN109443696A CN 109443696 A CN109443696 A CN 109443696A CN 201811070123 A CN201811070123 A CN 201811070123A CN 109443696 A CN109443696 A CN 109443696A
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
Whether the application is suitable for optics and electronic technology field, provides a kind of detection method, damaged for detecting the optical element being arranged in an Optical devices.The Optical devices include light source and corresponding optical element.The light beam that the light source issues forms the outgoing beam with specific function after optical element is modulated.The detection method includes the following steps: the optical characteristics for sensing the outgoing beam marginal portion；Compare normalized optical characteristic measured by sensed optical characteristics and preset intact optical element；And if the difference value of the optical characteristics sensed and the normalized optical characteristic exceeds preset error range, judging the measured optical unit, there are flaws.
Description
Technical field
The application belongs to optical technical field more particularly to a kind of detection method.
Background technique
Existing three-dimensional (Three Dimensional, 3D) sensing mould group generallys use laser of the emitted energy compared with concentration
Device projects sensing light pattern as light source, so the light emission side that light source is once arranged in is used to form the optics of projection light pattern
If breakage occurs in element, the laser of high-energy, which can shine directly on the eyes of user, to be damaged.
Summary of the invention
Technical problems to be solved in this application are to provide a kind of detection method, and can detecte out the Optical devices makes
Whether optical element is intact and light source is avoided directly to hurt user's eyes.
The application embodiment provides a kind of detection method, for whether detecting the optical element being arranged in an Optical devices
It is damaged.The Optical devices include light source and corresponding optical element.The light beam that the light source issues is after optical element is modulated
Form the outgoing beam with specific function.The detection method includes the following steps: to sense the outgoing beam marginal portion
Optical characteristics；Compare normalized optical characteristic measured by sensed optical characteristics and preset intact optical element；And if
The difference value of the optical characteristics and the normalized optical characteristic that are sensed then judges beyond preset error range by photometry
There are flaws for element.
In some embodiments, if further comprising the steps of: the optical characteristics and the normalized optical characteristic sensed
Identical or difference value then judges the measured optical unit to be intact in preset error range.
In some embodiments, be judged as if further comprising the steps of: the optical element there are flaw, close described in
Light source or the luminous energy for turning down the light source.
In some embodiments, it is further comprised the steps of: before the optical characteristics for sensing the outgoing beam marginal portion
The marginal portion of the outgoing beam is exported from emitting light path.
In some embodiments, it is staggered using both ends are arranged on the emitting light path of the outgoing beam marginal portion
Bireflectance film layer structure exports the marginal portion of outgoing beam by repeatedly reciprocal reflection mode from emitting light path.
In some embodiments, using on the emitting light path of the outgoing beam marginal portion be arranged reflecting slant make
The outgoing beam marginal portion is obtained to export from the mode of former emitting light path reflection deflection.
In some embodiments, using the side that sensor is arranged on the emitting light path of the outgoing beam marginal portion
Formula directly senses the optical characteristics of the outgoing beam marginal portion.
In some embodiments, the optical characteristics is a variety of attributes relevant to light, intensity selected from associated beam,
Wavelength, brightness, Energy distribution and one of it is formed by pattern and combinations thereof.
In some embodiments, the processor is connected with light source.The outgoing beam issues light beam by light source
The multiorder diffractive light beam formed after the modulation of diffraction optical element, the edge part light splitting sensed is high order diffraction grade
Light.
In some embodiments, the light source issues light beam after being deflected to second direction through by institute along first direction
It states optical element and is modulated to outgoing beam.
Detection method provided by the application embodiment is by comparing the optical characteristics of the measured optical unit with easily
The integrity degree of optical element used in Optical devices is detected, to prevent light source from appearing from the flaw of optical element and right
The eyes of user damage.
The additional aspect and advantage of the application embodiment will be set forth in part in the description, partially will be from following
Become obvious in description, or is recognized by the practice of the application embodiment.
Detailed description of the invention
Fig. 1 is the optical projection mould group that the detection unit that the application first embodiment provides and the 4th embodiment provide
Structural schematic diagram.
Fig. 2 is the optical projection mould group that the detection unit that the application second embodiment provides and the 5th embodiment provide
Structural schematic diagram.
Fig. 3 is the optical projection mould group that the detection unit that the application third embodiment provides and sixth embodiment provide
Structural schematic diagram.
Fig. 4 is the structural schematic diagram for the optical projection mould group that the 7th embodiment of the application provides.
Fig. 5 is the structural schematic diagram for the optical projection mould group that the 8th embodiment of the application provides.
Fig. 6 is the structural schematic diagram for the optical projection mould group that the 9th embodiment of the application provides.
Fig. 7 is the structural schematic diagram for the sensing device that the tenth embodiment of the application provides.
Fig. 8 is the structural schematic diagram for the equipment that the 11st embodiment of the application provides.
Fig. 9 is a kind of step flow chart of detection method provided by the present application.
Specific embodiment
Presently filed embodiment is described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the application, and should not be understood as the limitation to the application.?
In the description of the present application, it is to be understood that term " first ", " second " are only used for describing, and should not be understood as instruction or dark
Show relative importance or implicitly indicates the quantity of indicated technical characteristic or put in order.Define as a result, " first ",
The technical characteristic of " second " can explicitly or implicitly include one or more technical characteristic.In retouching for the application
In stating, the meaning of " plurality " is two or more, unless otherwise specifically defined.
In the description of the present application, it should be noted that unless otherwise specific regulation or limit, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integration connection；It can
To be mechanical connection, it is also possible to be electrically connected or is in communication with each other；It can be directly connected, the indirect phase of intermediary can also be passed through
Even, the connection inside two elements or the interaction relationship between two elements be can be.For the ordinary skill of this field
For personnel, the concrete meaning of above-mentioned term in this application can be understood as the case may be.
Following disclosure provides many different embodiments or example is used to realize the different structure of the application.In order to
Simplify disclosure herein, hereafter only to the component of specific examples and being set for describing.Certainly, they are merely examples, and
And purpose does not lie in limitation the application.In addition, the application can reuse reference number and/or reference word in different examples
Mother, this reuse are itself not indicate the various embodiments discussed to simplify and clearly state the application
And/or the particular kind of relationship between setting.In addition, the application in the following description provided by various specific techniques and material only
For the example for realizing technical scheme, but those of ordinary skill in the art should be aware that the technical solution of the application
It can be realized by other techniques for not describing hereafter and/or other materials.
Further, described feature, structure can be incorporated in one or more embodiment party in any suitable manner
In formula.In the following description, many details are provided so as to fully understand presently filed embodiment.However, this
Field technical staff will be appreciated that even if without one or more in the specific detail, or using other structures, group
Member etc. can also practice the technical solution of the application.In other cases, it is not shown in detail or describes known features or operation
To avoid the emphasis of fuzzy the application.
As shown in Figure 1, the application first embodiment provides a kind of detection unit 1, for detecting an optical projection mould
Whether the optical element 12 being arranged in group 10 is damaged.The optical projection mould group 10 includes light source 12, optical element 14 and setting
In the cover sheet 16 of 14 light emission side of optical element.The light beam that the light source 12 issues is formed after the modulation of optical element 14
Outgoing beam with specific function projects away.The optical element 14 include but is not limited to collimating element, beam-expanding element and
One of diffraction optical element (Diffractive Optical Elements, DOE) and combinations thereof.
In the present embodiment, the optical projection mould group 10 is the three-dimensional sense for sensing measured target object three-dimensional data
Survey device.The light beam can be the light beam with specific wavelength according to sensing principle and application scenarios.For example, can be infrared
Or near infrared light, wave-length coverage are 750 nanometers (Nanometer, nm) to 1650nm.
The detection unit 1 includes light guide structure 100, sensor 102 and processor 104.The light guide structure 100 will be through
It is exported by the marginal portion of the modulated outgoing beam of optical element 14 to sensor 102.In the present embodiment, the leaded light
Structure 100 will by the way of reflective coating 110 is respectively set on opposite sides surface of the cover sheet 16 along light direction
The marginal portion of outgoing beam is exported by multiple past interflection to the sensor 102.
The reflective coating 110 includes the first reflectance coating 111 and the second reflectance coating 112.First reflectance coating 111 is arranged
On 16 light emission side surface of cover sheet, and from wanting outgoing of the marginal portion of derived outgoing beam on cover sheet 16
Extend at position towards the direction far from 16 output optical zone domain center of cover sheet.Second reflectance coating 112 is arranged in cover sheet
On 16 incident side surfaces.Second reflectance coating 112 close to output optical zone domain center one end than the first reflectance coating 111 close to going out light
One end of regional center is further from the output optical zone domain center of the cover sheet 16, so that being located on 16 light-emitting surface of cover sheet
The first reflectance coating 111 marginal portion of outgoing beam can be reflected to the second reflectance coating 112, thus the side of outgoing beam
Edge is divided from the side for exporting in original emitting light path and reflecting back and forth between the first reflectance coating 111 and the second reflectance coating 112
Formula is conducted towards the direction far from output optical zone domain.The one end of second reflectance coating 112 far from output optical zone domain and the first reflectance coating 111
It mutually staggers between the one end in corresponding separate output optical zone domain along the direction perpendicular to reflective coating 110 with will be along cover sheet 16
The marginal portion of the outgoing beam of conduction is exported to sensor 102.
In the present embodiment, the sensor 102 is arranged in cover sheet 16 and 10 light direction of optical projection mould group
The opposite other side.Accordingly, the described one end of first reflectance coating 111 far from output optical zone domain is than the second reflectance coating 112 far from out
The one end in light region reflexes to the marginal portion of derived outgoing beam described positioned at cover sheet further from output optical zone domain
16 on the sensor 102 of light direction opposite side.
It is understood that in other embodiments, if the setting of the sensor 102 is thrown in cover sheet 16 along optics
The side of 10 light direction of shadow mould group, then the described one end of first reflectance coating 111 far from output optical zone domain is remoter than the second reflectance coating 112
The one end in light region is separated out apart from output optical zone domain more recently, the marginal portion of derived outgoing beam is reflexed into institute's rheme
In cover sheet 16 along the sensor 102 of light direction side.
The sensor 102 is used to sense the optical characteristics of the marginal portion of the derived outgoing beam.The outgoing
Specific optical field distribution is presented after the modulation via optical element 14 in light beam, described if the optical element 14 is intact
The optical field distribution of the marginal portion for the outgoing beam being exported is consistent, thus the sensor 102 sensed it is described
The optical characteristics of outgoing beam marginal portion remains unchanged.If occurring flaw, the optical element on the optical element 14
14 positions for flaw occur can change the optical field distribution of the outgoing beam script, and the sensor 102 senses out at this time
The standard light for the outgoing beam marginal portion that the optical characteristics and optical element of the marginal portion of irradiating light beam are sensed when intact
Learning characteristic can occur significantly to change.
The optical characteristics refers to different attribute relevant to light, including but not limited to the intensity of light, wavelength, brightness,
Energy distribution one of is formed by pattern and combinations thereof.The sensor is according to the inhomogeneity of the optical characteristics sensed
It can be not one of photodiode, photometer and imaging sensor and combinations thereof.
The processor 104 is connected with sensor 102, the outgoing beam for being sensed according to sensor 102
The optical characteristics of marginal portion judges whether the measured optical unit 14 is intact.It is preset in the processor 104 by photometry
The normalized optical characteristic of the outgoing beam marginal portion sensed under 14 fine status of element.The processor 104 will inspection
The optical characteristics of the outgoing beam marginal portion sensed when survey is compared with the preset normalized optical characteristic.If being felt
The optical characteristics of the outgoing beam marginal portion of survey is identical as the normalized optical characteristic or difference value is in preset error range
Interior, then the processor 104 judges the measured optical unit to be intact.If the optics of the outgoing beam marginal portion sensed is special
Property with the difference value of the normalized optical characteristic exceed error range, then the processor 104 judges that the measured optical unit 14 is deposited
In flaw.
In the present embodiment, the optical projection mould group 10 is to fill for sensing the sensing of measured target object three-dimensional data
It sets.The optical element 14 includes DOE.The light source 12 is formed after modulating via DOE has the other emergent light of multiple orders of diffraction
Beam.The light guide structure 100 detects the high order diffraction grade light-output of outgoing beam edge to sensor 102.If institute
DOE breakage is stated, the light beam that the light source 12 issues can be excessively emitted from breakage so that the light field of low order or zeroth order becomes strong and leads
Causing the light intensity of sensed high order diffraction grade light can obviously die down.Therefore, if the outgoing beam side that the sensor 102 senses
The light intensity decreasing degree of high order diffraction grade light at edge is more than preset range, then the processor 104 judges DOE for breakage.
It is understood that the processor 104 can also be connected with the light source 12 of the optical projection mould group 10, with
Opening or closing for the light source 12 is controlled according to above-mentioned judging result.If the processor 104 judges the optical element
14 is intact, then the light source 12 is allowed to keep normal operating conditions.If the processor 104 judges that the optical element 14 is deposited
In flaw, then the brightness for closing the light source 12 or the decrease light source 12 passes through optics to avoid the high-energy light beam of light source 12
Flaw on element 14 hurts the eyes of user.
As shown in Fig. 2, the application second embodiment provides a kind of detection unit 2, in first embodiment
Detection unit 1 is essentially identical, and the main distinction is that the light guide structure 200 includes corresponding on 26 light emission side surface of cover sheet
The reflection recess 210 that the position for needing derived outgoing beam marginal portion to project opens up.It is formed in the reflection recess 210
One reflecting slant 211.The marginal portion that the reflecting slant 211 will enter the outgoing beam of cover sheet 26 is big by total reflection
It causes to export along the length direction of cover sheet.The closer reflection recess 210 of cover sheet 26 is arranged in the sensor 202
End, to sense the optical characteristics for the outgoing beam marginal portion being exported.
As shown in figure 3, the application third embodiment provides a kind of detection unit 3, in first embodiment
Detection unit 1 is essentially identical, and the main distinction is that the detection unit 3 does not need setting light guide structure 100.The optical projection
Mould group 30 offers the position being emitted in requisition for the outgoing beam marginal portion of sensing on 36 light emission side surface of cover sheet
Containing groove 310.The sensor 302 is arranged in the containing groove 310 and sensing face towards cover sheet 36 enters light
Face, to sense the optical characteristics of the marginal portion of the outgoing beam.
It is understood that in other embodiments, the sensor 302 can also be set up directly on cover sheet 36
To the position being emitted in requisition for the outgoing beam marginal portion of sensing without opening up containing groove 310 on light emission side surface.
As shown in Figure 1, the 4th embodiment of the application provides a kind of optical projection mould group 10, used light can detect
Learn the integrality of element 14.The optical projection mould group 10 includes light source 12, optical element 14 and such as above-mentioned first embodiment
The detection unit 1.The light that the light source 12 issues forms going out with specific function after the modulation of optical element 14
Irradiating light beam.The detection unit 1 is by sensing the optical characteristics of the outgoing beam marginal portion to judge the optical element
Whether 14 is intact.
The optical projection mould group 10 further includes substrate 11 and lens barrel 13.The setting of light source 12 is on the substrate 11.It is described
Lens barrel 13 is provide on the substrate 14 to constitute the space for accommodating the light source 12 and the entire projecting light path of optical element 14.The light
Learn the top that element 14 is fixed on 12 light direction of light source by lens barrel 13.The cover sheet 16 is arranged in optical element
On 14 light direction and seal the lens barrel 13.
The sensor 102 is arranged in other than the emitting light path of tested optical projection mould group 10.That is, the sensor 102
Tested optical projection mould group 10 is not in for being arranged in the space of emitting light path.Specifically, such as: the optical projection mould
Group 10 further includes being formed in beside lens barrel 13 for the accommodating chamber 15 of the sensor 102 to be arranged.The cover sheet 16 is together
Cover lens barrel 13 and accommodating chamber 15.
In the present embodiment, the optical element 14 includes DOE140 and collimation lens 142.The light source 12 is issued
Light got on DOE140 after the collimation of collimation lens 142, after the modulation of DOE140 formed can project default figure
The outgoing beam of case.The optical path of the optical projection mould group 10 is along the same direction, the light of the light source 12 and optical element 14
Axis overlaps and extends along the same direction.
It is understood that the processor 104 can be set inside the optical projection mould group 10, also can be set
Outside optical projection mould group 10, for example it is located in the equipment configured with the optical projection mould group 10.The processor 104 can
It is realized and is connected with the sensor 102 by way of circuit trace or wireless transmission.
As shown in Fig. 2, the 5th embodiment of the application provides a kind of optical projection mould group 20, with the 4th embodiment
In optical projection mould group 10 it is essentially identical, the main distinction is that the optical projection mould group 20 uses above-mentioned second embodiment
Provided detection unit 2.
As shown in figure 3, the application sixth embodiment provides a kind of optical projection mould group 30, with the 4th embodiment
In optical projection mould group 10 it is essentially identical, the main distinction is that the optical projection mould group 30 uses above-mentioned second embodiment
Provided detection unit 3.
As shown in figure 4, the 7th embodiment of the application provides a kind of optical projection mould group 40, with the 4th embodiment
In optical projection mould group 10 it is essentially identical, the main distinction be the optical path of the optical projection mould group 40 through overshoot, it is described
Y is projected away the light beam that light source 42 is issued along first direction X in a second direction after overshoot.The detection unit 1 is the
Detection unit 1 in one embodiment.
In the present embodiment, the optical element 44 includes optical path-deflecting part 441 and DOE440.The optical path-deflecting part
441 include the incident side 4410 set gradually along optical path, reflecting surface 4412 and light emission side 4413.The light source is arranged in incident side
4410, to shine along first direction X towards optical path-deflecting part 441.The light beam retrodeviates through the reflection of reflecting surface 4412 and goes to second
Direction Y is simultaneously projected on the DOE440 that light emission side 4413 is arranged in.The optical path-deflecting part 441 can be reflecting prism or reflection
Plane mirror.
It is understood that the optical element 44 can also include having collimating element and/beam-expanding element.The collimation
Element and/or beam-expanding element can be correspondingly arranged at the incident side or light emission side of optical path-deflecting part, or can also be directly in institute
State the optical texture for being formed on the incident side surface or light emission side surface of optical path-deflecting part 441 and there is collimation and expand function.
The sensor 102 of the detection unit 1 is arranged on the circuit board 103 of 42 top of light source.The processor 104 can
It is arranged on the same circuit board 103 with sensor 102, also can be set outside the lens barrel for accommodating the optical projection mould group 40
Face is attached by the circuit board 103 with sensor 102.
As shown in figure 5, the 8th embodiment of the application provides a kind of optical projection mould group 50, with the 7th embodiment
In optical projection mould group 40 it is essentially identical, the main distinction be the detection unit 2 be second embodiment provided by inspection
Survey unit 2.The sensor 202 and light source 22 of the detection unit 2 are arranged on the same circuit substrate 203.The protection cap
The position that the circuit substrate 203 is corresponded on plate 56 offers holding tank 560.The sensor 202 is housed in the holding tank 560
With sense the reflection recess 510 derived from outgoing beam marginal portion optical characteristics.
As shown in fig. 6, the 9th embodiment of the application provides a kind of optical projection mould group 60, with the 7th embodiment
In optical projection mould group 40 it is essentially identical, the main distinction be the detection unit 3 be third embodiment provided by inspection
Survey unit 3.The sensor 302 is arranged on 66 light-emitting surface of cover sheet and is formed at the wherein one side edge in output optical zone domain
Containing groove 660 in.
As shown in fig. 7, the tenth embodiment of the application provides a kind of sensing device 80, it is used to sense measured target object
Three-dimensional information.The spatial information includes but is not limited to the three-dimensional information on measured target object surface, measured target object in space
In location information, the dimension information etc. of measured target object other 3 D stereo information relevant to measured target object.It is sensed
To measured target object spatial information can be used for identify measured target object or construct measured target object three-dimensional stereo model.
The sensing device 80 includes the optical projection mould group 10 as provided by above-mentioned four to nine embodiment and sensing mould
Group 82.The optical projection mould group 1 carries out sensing identification for projecting in particular beam to measured target object.The sensing mould group
82 are used to sense the specific image that the optical projection mould group 1 projects on measured target object and by analyzing the specific image
To sense the correlation space information of tested subject matter.
In the present embodiment, the sensing device 82 is to sense the three-dimensional information on measured target object surface and identify accordingly
The 3D face authentification device of measured target object identity.
As shown in figure 8, the 11st embodiment of the application provides a kind of equipment 70, such as mobile phone, laptop, plate
Computer, touch-control interaction screen, door, the vehicles, robot, automatic numerical control lathe etc..The equipment include at least one above-mentioned
Sensing device 80 provided by ten embodiments.In the present embodiment, the sensing device 52 is used in measured target object
Default light pattern is projected to sense the three-dimensional data of measured target object.The equipment 60 is used for the sense according to the sensing device 52
It surveys result and executes corresponding function to correspond to.Unlock, pay after the corresponding function including but not limited to identification user's identity,
Start the mood for utilizing depth learning technology to judge user after preset application program, avoidance, identification user's countenance
With any one or more in health condition.
As shown in figure 9, the application also provides a kind of optics using in the detection unit 1 detection optics projective module group 10
The detection method of 14 integrity degree of element, the optical projection mould group 10 include light source 12 and above-mentioned optical element 14.The light source
12 light beams issued form the outgoing beam with specific function after the modulation of optical element 14 and project away.The detection
Method includes the following steps:
Step S01 exports a part of light that the outgoing beam is located at edge from emitting light path.By needing to lead
Reflective optical micro-structures are set at the position that light passes through out, so that derived part light is wanted to deflect from original propagation path
To wanted derived direction.In the present embodiment, the optical element is diffraction optical element.The outgoing beam is light source
The multiorder diffractive light beam that issued light beam is formed after the modulation of diffraction optical element.A part of light derived from institute is positioned at side
The light of the high order diffraction grade of edge position.The outgoing beam can project default light pattern on a measured target object to sense
The three-dimensional data of measured target object.
The light source can be vertical cavity surface emitting laser (Vertical Cavity Surface Emitting
Laser,VCSEL).The outgoing beam is infrared or near infrared light, and wave-length coverage is 750nm to 1650nm.
Step S02 senses the optical characteristics of the marginal portion of the outgoing beam.The optical characteristics refers to and light phase
The different attribute of pass, the including but not limited to intensity of light, brightness, Energy distribution, are formed by pattern etc. at wavelength.For sensing
Sensor according to the different attribute of the optical characteristics sensed can be photodiode, photometer, imaging sensor etc..
Step S03, optical characteristics and the preset optical element for comparing the marginal portion of sensed outgoing beam are intact
In the case of the normalized optical characteristic of the marginal portion of outgoing beam that is sensed whether in preset error range.
The outgoing beam is via specific optical field distribution is presented after the modulation of optical element, if the optical element is intact
Intact, under conditions of light source is the same, the optical characteristics of the outgoing beam various pieces should be remained unchanged.If the optics member
There is flaw in part, such as: fracture, notch, the optical field distribution of the outgoing beam will occur significantly to change.Therefore, pass through
The optical characteristics of the outgoing beam same area sensed when intact with optical element, which is compared, can determine whether out the optics
Whether element there is flaw.
Step S04, if the optical characteristics of the marginal portion of the outgoing beam sensed with it is intact with preset optical element
In the case of the normalized optical characteristic of the marginal portion of outgoing beam that is sensed it is identical or difference value is in preset error range
It is interior, then judge the measured optical unit to be intact.
Step S05, if the optical characteristics of the marginal portion of the outgoing beam of sensing and preset optical element fine status
The difference value of the normalized optical characteristic of the marginal portion of lower sensed outgoing beam exceeds preset error range, then described
Processor judges the measured optical unit, and there are flaws.
Step S06 allows the light source to keep normal operating conditions if the optical element is judged as intact.
Step S07, if the optical element is judged as closing the light source there are flaw or turning down the light source
Luminous energy hurts by the flaw on optical element the eyes of user to avoid the high-energy light beam of light source.
Compared with existing optical projection mould group, detection unit provided herein, optical projection mould group and detection side
Method detects the whether damaged light source institute to prevent optical projection mould group of the optical element in optics projective module group in which can be convenient
The light of sending through optical element breakage direct irradiation user's eyes and the injury that may cause.
In the description of this specification, reference term " embodiment ", " certain embodiments ", " schematically implementation
What the description of mode ", " example ", " specific example " or " some examples " etc. meant to describe in conjunction with the embodiment or example
Particular features, structures, materials, or characteristics are contained at least one embodiment or example of the application.In this specification
In, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description
Sign, structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
The foregoing is merely the better embodiments of the application, all the application's not to limit the application
Made any modifications, equivalent replacements, and improvements etc., should be included within the scope of protection of this application within spirit and principle.
Claims (10)
1. whether a kind of detection method, damaged for detecting the optical element being arranged in an Optical devices, the Optical devices packet
Light source and corresponding optical element are included, the light beam that the light source issues forms going out with specific function after optical element is modulated
Irradiating light beam, the detection method include the following steps:
Sense the optical characteristics of the outgoing beam marginal portion；
Compare normalized optical characteristic measured by sensed optical characteristics and preset intact optical element；And
If the difference value of the optical characteristics sensed and the normalized optical characteristic exceeds preset error range, quilt is judged
There are flaws for photometry element.
2. detection method as described in claim 1, which is characterized in that further comprise the steps of:
If the optical characteristics sensed with the identical or difference value of the normalized optical characteristic in preset error range,
Judge the measured optical unit to be intact.
3. detection method as described in claim 1, which is characterized in that further comprise the steps of:
If the optical element is judged as closing the light source there are flaw or turns down the luminous energy of the light source.
4. detection method as described in claim 1, which is characterized in that special in the optics for sensing the outgoing beam marginal portion
Property before further comprise the steps of:
The marginal portion of the outgoing beam is exported from emitting light path.
5. detection method as claimed in claim 4, which is characterized in that using the emergent light in the outgoing beam marginal portion
The bireflectance film layer structure that setting both ends are staggered on the road is by the marginal portion of outgoing beam by repeatedly reciprocal reflection mode from out
It penetrates in optical path and exports.
6. detection method as claimed in claim 4, which is characterized in that using the emergent light in the outgoing beam marginal portion
Road setting reflecting slant exports the outgoing beam marginal portion from the mode of former emitting light path reflection deflection.
7. detection mould group as described in claim 1, it is characterised in that: using the emergent light in the outgoing beam marginal portion
The mode of road setting sensor directly senses the optical characteristics of the outgoing beam marginal portion.
8. detection method as described in claim 1, which is characterized in that the optical characteristics is a variety of attributes relevant to light,
Intensity, wavelength, brightness, Energy distribution selected from associated beam and one of it is formed by pattern and combinations thereof.
9. detection method as described in claim 1, which is characterized in that the outgoing beam issues light beam by spreading out by light source
The multiorder diffractive light beam formed after the modulation of optical element is penetrated, the edge part light splitting sensed is the light of high order diffraction grade.
10. detection method as described in claim 1, which is characterized in that the light source issues light beam by inclined along first direction
Switch to after second direction through being modulated to outgoing beam by the optical element.
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| CN201811070123.7A CN109443696B (en) | 2018-09-13 | 2018-09-13 | Detection method |
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| CN107167996A (en) * | 2017-06-05 | 2017-09-15 | 深圳奥比中光科技有限公司 | The laser projection module and depth camera adaptively adjusted |
| CN206892529U (en) * | 2017-06-06 | 2018-01-16 | 上海图漾信息科技有限公司 | Structured light generators |
| CN207096666U (en) * | 2017-08-16 | 2018-03-13 | 深圳奥比中光科技有限公司 | 3D imaging devices with photodetector |
| CN108319035A (en) * | 2018-03-23 | 2018-07-24 | 昆山丘钛微电子科技有限公司 | Optical projection module and its control method |
| CN108445701A (en) * | 2018-02-01 | 2018-08-24 | 宁波舜宇光电信息有限公司 | Detect the light beam projection device and depth camera of luminous intensity |
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2018
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167996A (en) * | 2017-06-05 | 2017-09-15 | 深圳奥比中光科技有限公司 | The laser projection module and depth camera adaptively adjusted |
| CN206892529U (en) * | 2017-06-06 | 2018-01-16 | 上海图漾信息科技有限公司 | Structured light generators |
| CN207096666U (en) * | 2017-08-16 | 2018-03-13 | 深圳奥比中光科技有限公司 | 3D imaging devices with photodetector |
| CN108445701A (en) * | 2018-02-01 | 2018-08-24 | 宁波舜宇光电信息有限公司 | Detect the light beam projection device and depth camera of luminous intensity |
| CN108319035A (en) * | 2018-03-23 | 2018-07-24 | 昆山丘钛微电子科技有限公司 | Optical projection module and its control method |
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