CN109269773A - A kind of detection unit - Google Patents
A kind of detection unit Download PDFInfo
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- CN109269773A CN109269773A CN201811070665.4A CN201811070665A CN109269773A CN 109269773 A CN109269773 A CN 109269773A CN 201811070665 A CN201811070665 A CN 201811070665A CN 109269773 A CN109269773 A CN 109269773A
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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 unit, damaged for detecting the optical element being arranged in an optics module.The optics module includes light source and optical element.The light that the light source issues forms the outgoing beam with specific function after the modulation of optical element.The detection unit includes sensor and processor, the optical characteristics of sensor sensing outgoing beam marginal portion.The processor is connected with sensor and the optical characteristics of outgoing beam marginal portion that is sensed according to the sensor judges the measured optical unit with the presence or absence of flaw.
Description
Technical field
The application belongs to optical technical field more particularly to a kind of detection unit.
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 unit, and can detecte out the optics module 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 unit, for whether detecting the optical element being arranged in an optics module
It is damaged.The optics module includes light source and optical element.The light that the light source issues is formed after the modulation of optical element
Outgoing beam with specific function.The detection unit includes sensor and processor, and the sensor senses outgoing beam
The optical characteristics of marginal portion.The outgoing beam that the processor is connected with sensor and is sensed according to the sensor
The optical characteristics of marginal portion judges the measured optical unit with the presence or absence of flaw.
In some embodiments, the processor by the outgoing beam marginal portion optical characteristics sensed with prestore
The measured optical unit fine status under normalized optical characteristic be compared, and in the optical characteristics and normalized optical sensed
The difference value of characteristic judges the measured optical unit when exceeding error range, and there are flaws.
In some embodiments, if the optical characteristics sensed is identical as normalized optical characteristic or difference value is preset
In error range, then the processor judges the measured optical unit to be intact.
In some embodiments, the processor is connected with light source, and the processor keeps working normally by light source
State, if the measured optical unit is judged as there are flaw, the processor closes light source or retrieves shining for light source
Energy.
In some embodiments, the sensor is arranged on the propagation path of outgoing beam marginal portion to sense and be somebody's turn to do
The optical characteristics of part light.
In some embodiments, the optics module further includes the cover sheet that optical element light emission side is arranged in, institute
It states and containing groove is offered to the position of the outgoing beam marginal portion in requisition for sensing on cover sheet light emission side surface, it is described
Sensor be arranged in the containing groove and sensing face towards cover sheet incidence surface, to sense the side of the outgoing beam
The optical characteristics of edge point.
In some embodiments, the detection unit further includes light guide structure, and the light guide structure is by outgoing beam
Marginal portion is exported to sensor.
In some embodiments, the optics module further includes the cover sheet that optical element light emission side is arranged in, institute
Light guide structure is stated to include the first reflectance coating being arranged on cover sheet light emission side surface and be arranged in cover sheet incident side table
The second reflectance coating on face, first reflectance coating is from wanting the marginal portion of derived outgoing beam going out on cover sheet
It penetrates at position and extends towards the direction far from cover sheet output optical zone domain center, second reflectance coating is close to output optical zone domain center
One end than the first reflectance coating close to output optical zone domain center one end further from the output optical zone domain center of the cover sheet will go out
The marginal portion of irradiating light beam enters between the first reflectance coating and the second reflectance coating toward interflection from deflection in emitting light path along remote
It is propagated in cover sheet in the direction for separating out light regional center.
In some embodiments, the optics module further includes the cover sheet that optical element light emission side is arranged in, institute
Stating light guide structure includes opening up on cover sheet light emission side surface in requisition for the position of derived outgoing beam marginal portion
There is reflection recess, a reflecting slant is formed in the reflection recess, the reflecting slant leads to the marginal portion of outgoing beam
The length direction that total reflection is crossed along cover sheet exports, and the end of the closer reflection recess of cover sheet is arranged in the sensor
To sense the optical characteristics of the marginal portion for the outgoing beam being exported.
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 sensor is selected from one of photodiode, photometer and imaging sensor
And combinations thereof.
Detection unit provided by the application embodiment is by comparing the reflected image of the measured optical unit with easily
The integrity degree of optical element used in optics module 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 knot for the optics module that the detection unit that the application first embodiment provides and the 4th embodiment provide
Structure schematic diagram.
Fig. 2 is the knot for the optics module that the detection unit that the application second embodiment provides and the 5th embodiment provide
Structure schematic diagram.
Fig. 3 is the knot for the optics module that the detection unit that the application third embodiment provides and sixth embodiment provide
Structure schematic diagram.
Fig. 4 is the structural schematic diagram for the optics module that the 7th embodiment of the application provides.
Fig. 5 is the structural schematic diagram for the optics module that the 8th embodiment of the application provides.
Fig. 6 is the structural schematic diagram for the optics module 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 optics module 10
Whether the optical element 12 of interior setting is damaged.The optics module 10 includes light source 12, optical element 14 and setting in optics member
The cover sheet 16 of 14 light emission side of part.The light beam that the light source 12 issues is formed after the modulation of optical element 14 with specific
The outgoing beam of function projects away.The optical element 14 includes but is not limited to collimating element, beam-expanding element and diffraction optics
One of element (Diffractive Optical Elements, DOE) and combinations thereof.
In the present embodiment, the optics module 10 is the three-dimensional sensing dress for sensing measured target object three-dimensional data
It sets.The light beam can be the light beam with specific wavelength according to sensing principle and application scenarios.For example, can be infrared or close
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 setting of sensor 102 is opposite with 10 light direction of optics module in cover sheet 16
The 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 output optical zone
The one end in domain further from output optical zone domain, by the marginal portion of derived outgoing beam reflex to it is described be located at cover sheet 16 with
On the sensor 102 of light direction opposite side.
It is understood that in other embodiments, if the sensor 102 is arranged in cover sheet 16 along optical mode
The side of 10 light directions of group, then 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 more recently, the marginal portion of derived outgoing beam is reflexed to described positioned at guarantor apart from output optical zone domain
Protecting cover plate 16 is 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 optics module 10 is the sensing device for sensing measured target object three-dimensional data.
The optical element 14 includes DOE.The light source 12 is formed after modulating via DOE has the other outgoing beam of multiple orders of diffraction.
The light guide structure 100 detects the high order diffraction grade light-output of outgoing beam edge to sensor 102.If described
DOE is damaged, and 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 causes
The light intensity of the high order diffraction grade light sensed can obviously die down.Therefore, if the outgoing beam edge that the sensor 102 senses
The light intensity decreasing degree of the high order diffraction grade light at place 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 optics module 10, with basis
Above-mentioned judging result controls opening or closing for the light source 12.If the processor 104 judges the optical element 14 and is
Intact, then allow the light source 12 to keep normal operating conditions.If the processor 104 judges the optical element 14, there are the flaws
Defect, the then brightness for closing the light source 12 or the decrease light source 12 pass through optical element to avoid the high-energy light beam of light source 12
Flaw on 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 optics module
30 offer accommodating to the position being emitted in requisition for the outgoing beam marginal portion of sensing on 36 light emission side surface of cover sheet
Groove 310.The sensor 302 be arranged in the containing groove 310 and sensing face towards cover sheet 36 incidence surface, with
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 optics module 10, used optics member can detect
The integrality of part 14.The optics module 10 includes light source 12, optical element 14 and the inspection as described in above-mentioned first embodiment
Survey unit 1.The light that the light source 12 issues forms the outgoing beam with specific function after the modulation of optical element 14.Institute
Detection unit 1 is stated by sensing the optical characteristics of the outgoing beam marginal portion to judge whether the optical element 14 is complete
It is good.
The optics module 10 further includes substrate 11 and lens barrel 13.The setting of light source 12 is on the substrate 11.The lens barrel
13 are 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 optics member
Part 14 is fixed on the top of 12 light direction of light source by lens barrel 13.Optical element 14 is arranged in the cover sheet 16
On light direction and seal the lens barrel 13.
The sensor 102 is arranged in other than the emitting light path of tested optics module 10.That is, the sensor 102 is not
In the space that tested optics module 10 is used to that emitting light path to be arranged.Specifically, such as: the optics module 10 further includes shape
At the accommodating chamber 15 for being used to be arranged the sensor 102 beside lens barrel 13.The cover sheet 16 cover together 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 optics module 10 is along the same direction, the optical axis phase of the light source 12 and optical element 14
Mutual respect merges to be extended along the same direction.
It is understood that the processor 104 can be set inside the optics module 10, also can be set in light
It learns outside mould group 10, for example is located in the equipment configured with the optics module 10.The processor 104 can pass through circuit trace
Or the mode and the sensor 102 realization connection of wireless transmission.
As shown in Fig. 2, the 5th embodiment of the application provides a kind of optics module 20, in the 4th embodiment
Optics module 10 is essentially identical, and the main distinction is the optics module 20 using detection provided by above-mentioned second embodiment
Unit 2.
As shown in figure 3, the application sixth embodiment provides a kind of optics module 30, in the 4th embodiment
Optics module 10 is essentially identical, and the main distinction is the optics module 30 using detection provided by above-mentioned second embodiment
Unit 3.
As shown in figure 4, the 7th embodiment of the application provides a kind of optics module 40, in the 4th embodiment
Optics module 10 is essentially identical, and the main distinction is the optical path of the optics module 40 through overshoot, and the light source 42 is along first
Y is projected away the light beam that direction X is issued in a second direction after overshoot.The detection unit 1 is in first embodiment
Detection unit 1.
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 optics module 40,
It 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 optics module 50, in the 7th embodiment
Optics module 40 is essentially identical, and the main distinction is that the detection unit 2 is detection unit 2 provided by second embodiment.
The sensor 202 and light source 22 of the detection unit 2 are arranged on the same circuit substrate 203.It is right on the cover sheet 56
Should the position of circuit substrate 203 offer holding tank 560.The sensor 202 is housed in the holding tank 560 to sense
State 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 optics module 60, in the 7th embodiment
Optics module 40 is essentially identical, and the main distinction is that the detection unit 3 is detection unit 3 provided by third embodiment.
It is recessed that the accommodating formed at the wherein one side edge in output optical zone domain on 66 light-emitting surface of cover sheet is arranged in the sensor 302
In slot 660.
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 optics module 10 as provided by above-mentioned four to nine embodiment and sensing mould group 82.
The optics module 1 carries out sensing identification for projecting in particular beam to measured target object.The sensing mould group 82 is for feeling
It surveys the specific image that the optics module 1 projects on measured target object and is sensed by analyzing the specific image by mark
Object correlation space information.
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 optical element using in the detection unit 1 detection optics module 10
The detection method of 14 integrity degrees, the optics module 10 include light source 12 and above-mentioned optical element 14.What the light source 12 issued
Light beam forms the outgoing beam with specific function after the modulation of optical element 14 and projects away.The detection method includes
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 optics module, detection unit provided herein, optics module and detection method, Ke Yifang
Just the whether damaged light to prevent the light source of optics module from being issued of the optical element in optics module is detected through optics
The breakage direct irradiation user's eyes of element 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 (11)
1. whether a kind of detection unit, damaged for detecting the optical element being arranged in an optics module, the optics module packet
Light source and optical element are included, the light that the light source issues forms the emergent light with specific function after the modulation of optical element
Beam, the detection unit include sensor and processor, the optical characteristics of sensor sensing outgoing beam marginal portion, institute
State processor be connected with sensor and the optical characteristics of outgoing beam marginal portion that is sensed according to the sensor come
Judge the measured optical unit with the presence or absence of flaw.
2. detection unit as described in claim 1, which is characterized in that the outgoing beam edge that the processor will be sensed
Partial optical characteristic is compared with the normalized optical characteristic under the measured optical unit fine status prestored, and is being sensed
The difference value of optical characteristics and normalized optical characteristic judges the measured optical unit when exceeding error range, and there are flaws.
3. detection unit as claimed in claim 2, which is characterized in that if the optical characteristics sensed and normalized optical characteristic phase
With or difference value in preset error range, then the processor judges the measured optical unit to be intact.
4. detection unit as claimed in claim 3, which is characterized in that the processor is connected with light source, the processor
Light source is allowed to keep normal operating conditions, if the measured optical unit is judged as there are flaw, the processor closes light
Source or the luminous energy for retrieving light source.
5. detection unit as described in claim 1, which is characterized in that outgoing beam marginal portion is arranged in the sensor
The optical characteristics of the part light is sensed on propagation path.
6. detection unit as described in claim 1, which is characterized in that the optics module further includes that setting goes out in optical element
The cover sheet of light side is opened the position of the outgoing beam marginal portion in requisition for sensing on cover sheet light emission side surface
Equipped with containing groove, the sensor be arranged in the containing groove and sensing face towards cover sheet incidence surface, with sense
Survey the optical characteristics of the marginal portion of the outgoing beam.
7. detection unit as described in claim 1, which is characterized in that the detection unit further includes light guide structure, described to lead
Photo structure exports the marginal portion of outgoing beam to sensor.
8. detection unit as claimed in claim 7, which is characterized in that the optics module further includes that setting goes out in optical element
The cover sheet of light side, the light guide structure include that the first reflectance coating being arranged on cover sheet light emission side surface and setting exist
The second reflectance coating on cover sheet incident side surface, first reflectance coating is from the marginal portion for wanting derived outgoing beam
Exit position on cover sheet extends towards the direction far from cover sheet output optical zone domain center, and second reflectance coating leans on
The one end at nearly output optical zone domain center is than the first reflectance coating close to one end going out further from the cover sheet at output optical zone domain center
Light regional center with the marginal portion of outgoing beam is deflected from emitting light path enter the first reflectance coating and the second reflectance coating it
Between propagated in cover sheet toward interflection along far from the direction at output optical zone domain center.
9. detection unit as claimed in claim 7, which is characterized in that the optics module further includes that setting goes out in optical element
The cover sheet of light side, the light guide structure include on cover sheet light emission side surface in requisition for derived outgoing beam side
The position of edge point offers reflection recess, and a reflecting slant is formed in the reflection recess, and the reflecting slant will be emitted
Length direction of the marginal portion of light beam by total reflection along cover sheet exports, and the sensor setting is relatively leaned in cover sheet
The end of near reflex groove is to sense the optical characteristics of the marginal portion for the outgoing beam being exported.
10. detection unit as described in claim 1, it is characterised 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.
11. detection unit as described in claim 1, which is characterized in that the sensor be selected from photodiode, photometer and
One of imaging sensor and combinations thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811070665.4A CN109269773A (en) | 2018-09-13 | 2018-09-13 | A kind of detection unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811070665.4A CN109269773A (en) | 2018-09-13 | 2018-09-13 | A kind of detection unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109269773A true CN109269773A (en) | 2019-01-25 |
Family
ID=65189456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811070665.4A Withdrawn CN109269773A (en) | 2018-09-13 | 2018-09-13 | A kind of detection unit |
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| Country | Link |
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| CN (1) | CN109269773A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488307A (en) * | 2019-07-25 | 2019-11-22 | 北醒（北京）光子科技有限公司 | A kind of laser radar |
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