CN109596319A - The detection system and method for optics module parameter - Google Patents
The detection system and method for optics module parameter Download PDFInfo
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- CN109596319A CN109596319A CN201811423702.5A CN201811423702A CN109596319A CN 109596319 A CN109596319 A CN 109596319A CN 201811423702 A CN201811423702 A CN 201811423702A CN 109596319 A CN109596319 A CN 109596319A
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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
- G01M11/02—Testing optical properties
- G01M11/0242—Testing optical properties by measuring geometrical properties or aberrations
- G01M11/0257—Testing optical properties by measuring geometrical properties or aberrations by analyzing the image formed by the object to be tested
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Abstract
The embodiment of the invention provides the detection system and method for a kind of optics module parameter, the detection system includes: indication device, and the indication device is set to the incident side of optics module to be detected, for indicating graph card feature.Photographic device, the photographic device is rotatably set to the flash ranging out of optics module to be detected, and the rotation center of the photographic device is overlapped with the pupil centre of optics module to be detected；Wherein, the photographic device is rotated to different location around the pupil centre and is shot, so that the graph card feature of different location is imaged after optics module to be detected in the center of the photographic device imaging sensor on the indication device.Of the invention has testing agency and process simple, the accurate advantage of the parameter information detected.
Description
Technical field
The present invention relates to optical field, in particular to a kind of the detection system and method for optics module parameter.
Background technique
With advanced optical design and the development of processing technology, display technology and processor and upgrading, virtual reality
The form and type of (Virtual Reality, VR) product emerge one after another, and application field is also further extensive.Virtual reality produces
The main operational principle of product is, after transmitting and amplification that image shown by display passes through optical mirror slip, image can human eye
Received, eye-observation to be amplification the virtual image.The better virtual reality products of quality more experience effect in order to obtain, light
The quality for learning module is concerned, and optical module can only carry out parameter detecting in process of production at present, and equipment and program all compare
It is more complex, higher cost.
Summary of the invention
The main object of the present invention is to provide the detection system and method for a kind of optics module parameter, it is intended to solve to survey at present
The problem of equipment and the program for trying optical module parameter are all more complicated, higher cost.
To achieve the above object, the embodiment of the invention provides a kind of detection system of optics module parameter, the detections
System includes:
Indication device, the indication device are set to the incident side of optics module to be detected, for indicating graph card feature；
Photographic device, the photographic device is rotatably set to the flash ranging that goes out of optics module to be detected, and the camera shooting fills
The rotation center set is overlapped with the pupil centre of optics module to be detected；
Wherein, the photographic device is rotated to different location around the pupil centre and is shot, so that the mark
The graph card feature of different location is after optics module to be detected on device, in the centre bit of the photographic device imaging sensor
It is set to picture.
Preferably, the detection system further includes turntable, and the photographic device is set on the turntable.
Preferably, the detection system further includes carrying lens barrel, and the carrying lens barrel is set close to described photographic device one end
Optics module to be detected is set, the indication device is arranged far from described photographic device one end in the carrying lens barrel.
Preferably, when the photographic device is in initial position, the optical axis of the photographic device and optical mode to be detected
The optical axis of group is coaxial.
Preferably, the photographic device includes fuselage and the camera lens that is set on fuselage, and the camera lens is tight shot.
Preferably, the field angle of the photographic device is 3-5 degree, and focal distance is 0.8-3 meters.
Preferably, the pupil centre is 13~15mm at a distance from the light-emitting surface of optics module to be detected.
In addition, to achieve the above object, the present invention also proposes a kind of detection method of optics module parameter, the optical mode
The detection method of group parameter includes the following steps:
Control photographic device is rotated and is shot, so that the graph card feature on indication device passes through optics module to be detected
Afterwards, the photographic device imaging sensor center be imaged, wherein the rotation center of the photographic device with it is to be detected
The pupil centre of optics module is overlapped；
Offset distance between the different graph card features and/or the photographic device are obtained from optics module light to be detected
Rotation angle of the shaft position to graph card characteristic imaging position；
The parameter information of optics module to be detected is obtained according to the offset distance and/or rotation angle.
Preferably, the parameter information of optics module to be detected include in effective focal length, optical distortion and field angle at least
It is a kind of.
Preferably, the graph card feature includes the benchmark graph card feature positioned at the indication device center and offset institute
State the offset graph card feature of indication device center；
When required detection parameters are effective focal length, obtain between the offset graph card feature and the benchmark graph card feature
The first offset distance, and photographic device corresponding with the first offset distance first rotation angle；
The first focal length under each offset direction is obtained according to each first offset distance and the first rotation angle；
Using first focal length as the effective focal length of optics module to be detected.
Preferably, the graph card feature includes the benchmark graph card feature positioned at the indication device center and offset institute
State the offset graph card feature of indication device center, wherein the offset graph card feature includes at least two；
When required detection parameters are effective focal length, obtain the offset graph card feature on different offset directions with it is described
The first offset distance between benchmark graph card feature, and the first rotation angle of photographic device corresponding with the first offset distance
Degree；
The first focal length under each offset direction is obtained according to each first offset distance and the first rotation angle；
Using the average value of the first focal length under all offset directions as the effective focal length of optics module to be detected.
Preferably, when required detection parameters are optical distortion, indication device center to the indication device edge is obtained
Between region the offset graph card feature and the benchmark graph card feature between the second offset distance, and with described second
Second rotation angle of the corresponding photographic device of offset distance；
The second focal length is obtained according to second offset distance and with the second rotation angle；
The optical distortion of the optics module to be detected is obtained according to second focal length and the effective focal length.
It preferably, is pure white by the graph card feature replacement on the indication device when required detection parameters are field angle
Picture；
It controls the photographic device to rotate in a first direction, be sensed when the pure white picture is imaged in the photographic device
When the gray value of imaging drops to preset range in device, the corresponding rotation angle of the photographic device is third rotation at this time for calibration
Gyration；
It controls the photographic device to rotate in a second direction, be sensed when the pure white picture is imaged in the photographic device
When the gray value of imaging drops to preset range in device, the corresponding rotation angle of the photographic device is described the at this time for calibration
Four rotation angles；Wherein, the party is to opposite with second direction；
Angle is rotated according to the third and the 4th rotation angle obtains the field angle of the optics module to be detected.
Preferably, the step of the parameter information that optics module to be detected is obtained according to the offset distance and rotation angle
After rapid, further includes:
The optics module to be detected is controlled around the photographic device optical axis rotation and detects the light to be detected again
Learn the parameter information of mould group different cross section.
Preferably, the indication device is display screen, the offset distance between the acquisition difference graph card features
Step includes:
Obtain the pel spacing number between the display screen matrix distance, and different graph card features；
The offset distance is obtained according to the element distance of the display screen image and pel spacing number
The present invention is caught by the graph card feature of the mark different location on the indication device in photographic device rotation
When catching the graph card feature of different location, the offset distance and the photographic device for obtaining corresponding graph card feature correspond to the offset distance
From the information such as rotation angle, and calculated according to information such as the rotation angles of offset distance and the photographic device described to be detected
The parameter information of optics module, so as to judge whether the optics module to be detected meets design according to the parameter information
And visual field demand, or predistortion processing, above-mentioned inspection are carried out to the optics module to be detected according to the parameter information later period
Examining system structure and testing process are simple, have well solved optical module parametric test equipment in the prior art and program is multiple
Miscellaneous, at high cost problem.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is that the detection system of optics module parameter of the present invention unifies the structural schematic diagram of embodiment；
Fig. 2 is the flow diagram of the detection method first embodiment of optics module parameter of the present invention；
Fig. 3 is the flow diagram of the detection method second embodiment of optics module parameter of the present invention；
Fig. 4 is the flow diagram of the detection method 3rd embodiment of optics module parameter of the present invention；
Fig. 5 is the structural schematic diagram of the another embodiment of detection system of optics module parameter of the present invention；
Fig. 6 is the flow diagram of the detection method fourth embodiment of optics module parameter of the present invention；
Fig. 7 is the structural schematic diagram of the detection system another embodiment of optics module parameter of the present invention；
Fig. 8 is the flow diagram of the 5th embodiment of detection method of optics module parameter of the present invention；
Fig. 9 is the flow diagram of the detection method sixth embodiment of optics module parameter of the present invention；
Figure 10 is the flow diagram of the 7th embodiment of detection method of optics module parameter of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explanation in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if institute
When stating particular pose and changing, then the directionality instruction also correspondingly changes correspondingly.
It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
The combination of case is not present, also not the present invention claims protection scope within.
Fig. 1, a kind of detection system 100 of optics module parameter proposed by the present invention are please referred to, the detection system 100 is wrapped
It includes:
Indication device 10, the indication device 10 is set to the incident side of optics module 30 to be detected, for indicating graph card
Feature 11.
Photographic device 20, the photographic device 20 are rotatably set to the flash ranging out of optics module 30 to be detected, and described
The rotation center 21 of photographic device 20 is overlapped with the pupil centre of optics module 30 to be detected；
Wherein, the photographic device 20 is rotated to different location around the rotation center 21 and is shot, so that described
The graph card feature 11 of different location is after optics module 30 to be detected on indication device 10, in the imaging of the photographic device 20
The center of sensor is imaged.
In the present embodiment, the indication device 10 is display screen, and the graph card feature 11 is to be drawn on the display screen
The feature that face background is set off, such as the white crosses frame that shows in black background, white are round, white square, the present embodiment pair
The color of the graph card feature 11 that the display screen is shown, shape with no restrictions, as long as the graph card feature 11 can be taken the photograph by described
As device 20 capture and can 20 imaging on photographic device imaging sensor, and the graph card feature 11 can be highlighted when imaging
Display.
In other embodiments, the indication device 10 includes backlight (not shown) and is set on backlight
Pattern (not shown), the graph card feature 11 is the feature set off on pattern by background area, as being arranged on a dark background
White crosses frame, white circle, white square etc., the present embodiment to the color of the feature on the pattern, shape with no restrictions,
If feature on the pattern can be captured and can be imaged in photographic device 20 by the photographic device 20, and when imaging described in
Graph card feature 11 can be highlighted.
In the present embodiment, indication device 10B shown in Fig. 1 is turned over by indication device 10A turn 90 degrees to obtain, to express
Graph card feature 11 on the indication device 10.The indication device 10 is set to the incident side of optics module 30 to be detected, with
Make to reach the photographic device 20 after passing through the optics module 30 to be detected from the emergent ray that the graph card feature 11 issues,
And it is imaged in the center of 20 imaging sensor of photographic device.The optics module to be detected 30 can be single lens,
It can also be the optical system for including multiple lens；With the optical mode with light aggregation feature in virtual reality device in the present invention
Group is illustrated.
In the present embodiment, the photographic device 20 is rotatably set to the flash ranging out of optics module 30 to be detected, so as to
It receives emergent ray of the graph card feature 11 Jing Guo the optics module 30 to be detected and carries out imaging of taking pictures；The camera shooting dress
It sets 20 rotation center 21 to be overlapped with the pupil centre of optics module 30 to be detected, and it is understood that optics module
Pupil centre in flash ranging out, in the position for the smallest bore that the emergent ray passes through jointly, when human eye pupil herein
It is easiest to that most light is allowed to enter eyes when place, similarly, when the rotation center 21 and photometry to be checked of the photographic device 20
When the pupil centre of mould group 30 is overlapped and is rotated, the emergent ray of graph card feature 11 as much as possible can also be allowed to enter
The photographic device 20, so that imaging of the graph card feature 11 in the photographic device 20 is apparent.
In the present embodiment, during the photographic device 20 surrounds the rotation center 21 rotation, including one initial
Position, in the initial position, the optical axis of the photographic device 20 is coaxial with the optical axis of the optics module 30 to be detected, preferably
Ground, the center of the display device are also disposed on the optical axis of the optics module to be detected 30, at this point, definition is in institute
The graph card feature 11 for stating the center of display device is benchmark graph card feature 11A, and definition deviates in the indication device 20
The graph card feature 11 of heart position is offset graph card feature 11B, and the offset graph card feature 11B can have multiple；In the initial bit
It sets, the photographic device 20 can take the benchmark graph card feature 11A just, and keep the benchmark graph card feature 11A proper
Fortunately the center imaging of 20 imaging sensor of photographic device.
It is appreciated that when the photographic device 20 needs to shoot the offset graph card feature 11B, along with the offset
The opposite direction of the offset direction of graph card feature 11B rotates around the rotation center 21, can just capture the offset graph card
Feature 11B, and the offset graph card feature 11B is imaged in the center of 20 imaging sensor of photographic device, for example,
When offset graph card feature 11B shown in Fig. 1 deviates downwards, the needs of photographic device 20 are rotated up to capture the offset
Graph card feature 11B.The offset graph card feature 11B imaging is turned to relative to the rotation center 21 in the photographic device 20
During position, the photographic device 20 is obtained from the initial position to the offset imaging position graph card feature 11B
Rotation angle and the offset graph card feature 11B deviate the information such as the offset distance of the benchmark graph card feature 11A, and root
The parameter information of the optics module to be detected 30 is calculated according to above- mentioned information, the parameter information includes but not less than effectively coke
Away from least one of, optical distortion and field angle.
In conclusion graph card feature 11 of the present invention by the mark different location on the indication device 10, described
When the rotation of photographic device 20 captures the graph card feature 11 of different location, obtains the offset distance of corresponding graph card feature 11 and described take the photograph
The information such as the rotation angle as the corresponding offset distance of device 20, and according to the rotation of offset distance and the photographic device 20
The information such as angle calculate the parameter information of the optics module to be detected 30, so as to according to parameter information judgement
Whether optics module 30 to be detected meets design and visual field demand, or according to the parameter information later period to the light to be detected
It learns mould group 30 and carries out the operation such as predistortion processing, 100 structure of said detecting system and testing process are simple, have well solved existing
There are optical module parametric test equipment and program complexity, problem at high cost in technology.
Preferably, the detection system 100 further includes turntable 40, and the photographic device 20 is set to the turntable 40
On.
In the present embodiment, the turntable 40 extends along the direction of rotation of the photographic device 20, the camera shooting dress
It sets 20 to be slidably set on the turntable 40, the photographic device 20 can be manually adjusted it in the rotation by tester
The upper position of platform 40, it is preferred that the photographic device 20 surrounds the rotation by motor driven on the turntable 40
Center 21 rotates.
Specifically, the turntable 40 can be a bracket (not shown), the bracket includes that at least (figure is not for two root posts
Show) and it is set to the arc draw runner (not shown) of the column top, in the equivalent center of circle of the arc draw runner and the rotation
The heart 21 is overlapped, and the photographic device 20 is set on the arc draw runner by a spout, offers one on the spout
Sliding slot, the arc draw runner is arranged in the sliding slot to be slidably matched with the spout.
Preferably, the detection system 100 further includes carrying lens barrel 50, and the carrying lens barrel 50 is close to the photographic device
Optics module 30 to be detected is arranged in 20 one end, and the mark dress is arranged far from described 20 one end of photographic device in the carrying lens barrel 50
Set 10.
In the present embodiment, the indication device 10 and optics module to be detected is respectively set in the carrying camera lens both ends
30, the carrying lens barrel 50 plays fixed function to the indication device 10 and optics module to be detected 30, keeps indication device
10 and the relative position of optics module to be detected 30 fix, meanwhile, the carrying lens barrel 50 is opaque, prevents extraneous light from entering
Into the carrying lens barrel 50, play a protective role to the optical path of the indication device 10 and optics module to be detected 30.
It is understood that when the optics module 30 to be detected is the optics module of virtual reality device, the mark
Showing device 10, optics module to be detected 30 and carrying lens barrel 50 have collectively constituted a virtual reality device, that is, the application
Detection system 100 can be used for detecting the optical parameter information of virtual reality device.
Preferably, when the photographic device 20 is in initial position, the optical axis and light to be detected of the photographic device 20
The optical axis for learning mould group 30 is coaxial.
In the present embodiment, as previously mentioned, when the photographic device 20 is in initial position, the light of the photographic device 20
Axis is coaxial with the optical axis of the optics module 30 to be detected, and can capture the benchmark graph card feature 11A, and make the base
Quasi- graph card feature 11A is imaged in the center of 20 imaging sensor of photographic device.
Further, after the optical axis for adjusting the photographic device 20 is coaxial with the optical axis of optics module 30 to be detected, by
There are errors when photographic device 20 and optics module 30 to be detected are in assembling, cannot make the benchmark graph card feature well
11A images in the center of the photographic device 20 just, and the present invention is by adjusting the benchmark graph card feature 11A described
Position on indication device 10, so that the benchmark graph card feature 11A accurately images in the imaging of photographic device 20 sensing
The center of device, but also the acquisition that the later period rotates angle and the offset distance to the photographic device 20 is more accurate.
Further, the benchmark graph card feature 11A is being adjusted behind the position on the indication device 10, in order to make
It is apparent to state imaging of the benchmark graph card feature 11A in the center of 20 imaging sensor of photographic device, tune can be passed through
The focal distance of the whole photographic device 20 is imaged in the photographic device 20 so as to adjust the benchmark graph card feature 11A and passes
The imaging definition of the center of sensor.
Preferably, the photographic device 20 includes fuselage (not shown) and the camera lens (not shown) being set on fuselage, institute
Stating camera lens is tight shot.
In the present embodiment, as previously mentioned, the present invention adjustable photographic device 20 and institute before detecting
Optics module 30 to be detected is stated to guarantee that the two is coaxial, and adjusts the benchmark graph card feature 11A in the position of indication device 10
And the focal distance of the photographic device 20, but in the detection process, namely the photographic device 20 rotation and clapped
During taking the photograph, three features of features described above cannot be adjusted, in the process by using tight shot, it is ensured that institute
It states imaging definition of the graph card feature 11 in the center of 20 imaging sensor of photographic device to be consistent, to guarantee to survey
The consistency and stability of examination process.
Preferably, the field angle of the photographic device 20 is 3-5 degree, and focal distance is 0.8-3 meters.
In the present embodiment, the field angle of the photographic device 20 is more advantageous to concentration using narrow visual field angle for 3-5 degree
Emergent ray of the graph card feature 11 after the optics module 30 to be detected is received, so that the graph card feature 11 is in institute
The imaging for stating photographic device 20 is more clear accurately.
In the present embodiment, 20 focal distance of photographic device be 0.8-3 meters, due in virtual reality device human eye away from
From the virtual reality image (virtual reality image is the virtual image) seen probably between 0.8-3 meters, thus detection of the invention
System 100 can detect the parameter information of the optics module of nearly all virtual reality device, to reinforce inspection of the present invention
The broad applicability of examining system 100.
Preferably, the pupil centre is 13~15mm at a distance from the light-emitting surface of optics module 30 to be detected.
In the present embodiment, the light-emitting surface namely optics module to be detected of the pupil centre and optics module 30 to be detected
The distance in 30 the last one face is 13~15mm, and the pupil centre of optics module 30 to be detected is in flash ranging out, in emergent ray
The position of the smallest bore passed through jointly, when the pupil of human eye here when be easiest to that most light is allowed to enter eyes,
That is, when the rotation center 21 of the photographic device 20 is overlapped with the pupil centre of optics module 30 to be detected and is rotated,
The emergent ray of graph card feature 11 as much as possible can be allowed to enter the photographic device 20, so that the graph card feature 11 exists
It is preferably imaged in the photographic device 20.
In addition, to achieve the above object, the present invention also proposes a kind of inspection of optics module parameter also referring to Fig. 1-2
Survey method proposes the detection method of the optics module parameter of the 1st embodiment of the invention based on above-mentioned detection system 100, described
The detection method of optics module parameter includes the following steps:
Step S10 controls the photographic device and rotates and shot, so that the position on the indication device is different
Graph card feature is imaged, wherein described after optics module to be detected in the center of the photographic device imaging sensor
The rotation center of photographic device is overlapped with the pupil centre of optics module to be detected；
Step S20 obtains offset distance between the different graph card features and/or the photographic device from detection optics
Mould group optical axis position (namely described initial position) arrives the rotation angle of graph card characteristic imaging position；
Step S30 obtains the parameter information of optics module to be detected according to the offset distance and/or rotation angle.
In the present embodiment, the indication device is set to the incident side of optics module to be detected, so that the graph card is special
The light of sign reaches the photographic device after passing through the optics module to be detected, and in the photographic device imaging sensor
Center imaging.The photographic device is rotatably set to the flash ranging out of optics module to be detected, to receive the graph card
Emergent ray of the feature Jing Guo the optics module to be detected simultaneously carries out imaging of taking pictures；The rotation center of the photographic device with to
The pupil centre for detecting optics module is overlapped, and the emergent ray of graph card feature as much as possible is allowed to enter the photographic device,
So that the graph card feature is preferably imaged in the photographic device.
In the present embodiment, during the photographic device surrounds rotation center rotation, including an initial position,
In the initial position, the optical axis of the photographic device is coaxial with the optical axis of the optics module to be detected, it is preferable that described aobvious
The center of showing device is also disposed on the optical axis of the optics module to be detected, at this point, in the initial position, it is described to take the photograph
As device can take the benchmark graph card feature just, and make the benchmark graph card feature just the photographic device at
As the center of sensor is imaged.
In subsequent detection process, when the photographic device needs to shoot the offset graph card feature, along with institute
The opposite direction of the offset direction of offset graph card feature is stated, is rotated around the rotation center, can just capture the deflection graph
Card feature, and the offset graph card feature is imaged in the center of the photographic device imaging sensor.
The process of the offset graph card characteristic imaging position is turned to relative to the rotation center in the photographic device
In, the photographic device is obtained from the initial position to the rotation angle of the offset graph card characteristic imaging position, Yi Jisuo
It states offset graph card feature and deviates the information such as the offset distance of the benchmark graph card feature, and is described to be checked according to above- mentioned information calculating
The parameter information of photometry mould group, the parameter information include but is not limited to effective focal length, optical distortion and field angle etc..Due to
It is different to obtain detection information required for different parameter informations, can illustrate below.
In conclusion the graph card feature of detection method of the invention by the mark different location on the indication device,
When the photographic device rotates the graph card feature for capturing different location, obtains the offset distance of corresponding graph card feature and described take the photograph
As device corresponds to the information such as the rotation angle of the offset distance, and according to the rotation angle of offset distance and the photographic device
Etc. information calculate the parameter information of the optics module to be detected, it is described to be detected so as to be judged according to the parameter information
Whether optics module meets design and visual field demand, or according to the parameter information later period to the optics module to be detected into
Row predistortion is handled to improve the imaging performance of optics module, and above-mentioned detection method process is simple, has well solved existing skill
Optical module parametric test equipment and program complexity, problem at high cost in art.
Referring to Fig. 1, preferably, the parameter information of the optics module to be detected of the detection includes effective focal length, optics
At least one of distortion and field angle.
In the present embodiment, when detecting the effective focal length, the offset distance of the offset graph card feature is the smaller the better,
As long as can photographic device identification, capture the offset distance, thus, it is described when detecting the effective focal length
Offset graph card feature is generally positioned near the benchmark graph card feature, the corresponding emergent light of the offset graph card feature by
Detect the dipped beam axis region or central vision region of optics module.
When detecting the optical distortion, due to the dipped beam axis region or central vision region of optics module to be detected
Optical distortion is little, and the region far from the optical axis occurs for biggish optical distortion, therefore, accordingly, apart from the benchmark
The offset reference graph card feature is arranged in the farther away region of graph card feature, and the thickness for detecting the optics module to be detected becomes
Change the biggish optical distortion compared with far region.
It, can be by controlling the photographic device in turntable both ends sensing in mark dress when detecting the field angle
The decline degree of the grayscale value of marginal position is set to demarcate the field angle, can be illustrated below.
In conclusion in the photographic device from initial position turntable one end, then the initial position that turns back reaches rotation
The turntable other end during coming back to initial position, can detecte and calculate the effective focal length, optical distortion and visual field
Information needed at least one or multiple of angle, therefore, detection method of the invention can detecte optics module to be detected
Parameter information include at least one of effective focal length, optical distortion and field angle.
Also referring to Fig. 1,3, optics module parameter of the invention is proposed based on the 1st embodiment of detection method of the invention
Detection method the 2nd embodiment, the step S20 includes:
Step S21A, the graph card feature include the benchmark graph card feature and offset positioned at the indication device center
The offset graph card feature of the indication device center；When required detection parameters are effective focal length, the deflection graph is obtained
The first offset distance between card feature and the benchmark graph card feature, and photographic device corresponding with the first offset distance
First rotation angle；
The step S30 includes:
Step S31A obtains the under each offset direction according to each first offset distance and the first rotation angle
One focal length；
Step S32A, using first focal length as the effective focal length of optics module to be detected.
In the present embodiment, first offset distance and the first rotation angle under an offset direction can be only obtained,
Directly according under the offset direction the first offset distance and the first rotation angle obtain the first focal length, and by first focal length
As the effective focal length of optics module to be detected, in this way, can be with the effective focal length of optics module to be detected described in quick obtaining.
Specifically, the first focal length under an offset direction: EFL=H/tan (θ) is obtained according to the following formula；Wherein, EFL
The first focal length is represented, H represents the first offset distance of the offset graph card feature, and θ represents corresponding with the first offset distance H
First rotation angle.
Also referring to Fig. 1,4, optics module ginseng of the invention is proposed based on detection method 1-2 embodiment of the invention
3rd embodiment of several detection methods, the step S20 include:
Step S21B, the graph card feature include the benchmark graph card feature and offset positioned at the indication device center
The offset graph card feature of the indication device center；When required detection parameters are effective focal length, different offset sides are obtained
The first offset distance between the upward offset graph card feature and the benchmark graph card feature, and with the first offset distance
First rotation angle of corresponding photographic device, wherein the offset graph card feature includes at least two；
The step S30 includes:
Step S31B obtains the under each offset direction according to each first offset distance and the first rotation angle
One focal length；
Step S32B, using the average value of the first focal length under all offset directions as effective coke of optics module to be detected
Away from.
In the present embodiment, using average value the having as optics module to be detected of the first focal length under all offset directions
Focal length is imitated, so that the detection of the effective focal length is more accurate；All offset directions can be from the indication device center
Any direction of location triggered, as shown in figure 1 upwards, downwards, to the left, to the right or to each Angle Position extending direction.
Specifically, the first focal length under each offset direction: EFL=H/tan (θ) is obtained according to the following formula；Its
In, EFL represents the first focal length, and H represents the first offset distance of the offset graph card feature, and θ is represented and first offset distance
The first rotation angle corresponding from H.After acquiring the first focal length under each offset direction, the flat of multiple first focal lengths is being sought
Effective focal length of the mean value as the mould group to be detected.
Also referring to Fig. 5-6, optics module ginseng of the invention is proposed based on detection method 1-3 embodiment of the invention
4th embodiment of several detection methods, the step S20 include:
Step S22 obtains indication device center to the indication device edge when required detection parameters are optical distortion
Between region the offset graph card feature and the benchmark graph card feature between the second offset distance, and with described second
Second rotation angle of the corresponding photographic device of offset distance；
The step S30 includes:
Step S33 obtains the second focal length according to second offset distance and with the second rotation angle；
Step S34 obtains the photometry to be checked according to second focal length and the effective focal length or the first focal length
The optical distortion of mould group.
In this city embodiment, as shown in figure 5, the offset distance of the offset graph card feature relatively measures the effective focal length
Offset distance it is big, reason is: the optics module to be detected is far from only optical axis region, the biggish marginal zone of thickness change
The optical distortion in domain is larger, and the optical distortion in dipped beam axis region or central vision region is larger, therefore, is measuring the light
When learning distortion, general measure is far from only optical axis region, the biggish fringe region of thickness change.It is understood that the present invention
The optical distortion of optical mode any position to be detected can be measured.
Specifically, the optical distortion: D=(EFL1-EFL)/(EFL) is obtained according to the following formula；
Wherein, D represents optical distortion, and EFL1 represents the second focal length, and EFL represents effective focal length or the first focal length.
Referring to Figure 7 together -8, optics module ginseng of the invention is proposed based on detection method 1-4 embodiment of the invention
5th embodiment of several detection methods, the step S20 include:
Graph card feature replacement on the indication device is pure white when required detection parameters are field angle by step S23
Picture；
Step S24 controls the photographic device and rotates in a first direction, as rotated upwards in Fig. 6, when the pure white figure
Piece demarcates the corresponding rotation of the photographic device at this time when the gray value of imaging drops to preset range in the photographic device
Gyration is that third rotates angle；
Step S25 controls the photographic device and rotates in a second direction, as being rotated down in Fig. 6, when the pure white figure
Piece demarcates the corresponding rotation of the photographic device at this time when the gray value of imaging drops to preset range in the photographic device
Gyration is the 4th rotation angle；Wherein, the party is to opposite with second direction；
The step S30 includes:
Step S35 rotates angle according to the third and the 4th rotation angle obtains the view of the optics module to be detected
Rink corner.
In the present embodiment, the photographic device is rotated to the opposite end of the turntable, obtains the mark dress
The gray value in marginal position is set, when the gray value of marginal position drops to preset range, then demarcates the camera shooting dress at this time
The angle for setting rotation is the half of the field angle.The preset range is gray value phase of the indication device in marginal position
Gray value than the indication device in center drops to 20%-80%, most preferably drops to 50.
Specifically, the field angle: FOV=θ 1+ θ 2 is obtained according to the following formula；Wherein, FOV represents field angle, 1 generation of θ
Table third rotates angle, and θ 2 represents the 4th rotation angle namely θ 1, θ 2 are the half of the field angle, and the θ 1, θ 2 are described take the photograph
It is measured when rotating to turntable both ends as device.
Also referring to Fig. 9, optics module parameter of the invention is proposed based on detection method 1-5 embodiment of the invention
Detection method the 6th embodiment, after the step S30: further include:
Step S40 controls the optics module to be detected around the photographic device optical axis rotation and described in detecting again
The parameter information of optics module different cross section to be detected.
In the present embodiment, the photographic device optical axis rotation is surrounded by rotating the optics module to be detected, changed
The section of co-planar where being rotated in the optics module to be detected with the photographic device, to measure described to be detected
The parameter information of different cross section in optics module.Specifically, the carrying lens barrel can be passed through by clamping the carrying lens barrel
The optics module to be detected and indication device is driven to rotate simultaneously.
Referring to Fig. 10, proposing the proposition of present invention 1-6 embodiment optics of the invention based on above-mentioned detection system
7th embodiment of the detection method of mould group parameter, the step S20 further include:
Step S26 obtains the pel spacing number between the display screen matrix distance, and different graph card features；
Step S27 obtains the offset distance according to the display screen matrix distance and pel spacing number.
In the present embodiment, when the indication device is display screen, by the display screen matrix distance and different graph cards
Pel spacing number product keeps the acquisition of the offset distance more accurate as the offset distance between feature, so that
The acquisition of the effective focal length and optical distortion is more accurate.When especially required detection parameters are effective focal length, due to described inclined
It is smaller to move distance, by the above-mentioned means, the offset distance can accurately be calculated, to calculate more accurate effective focal length.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the design of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/it is used in it indirectly
He is included in scope of patent protection of the invention relevant technical field.
Claims (15)
1. a kind of detection system of optics module parameter, which is characterized in that the detection system includes:
Indication device, the indication device are set to the incident side of optics module to be detected, for indicating graph card feature；
Photographic device, the photographic device are rotatably set to the flash ranging that goes out of optics module to be detected, and the photographic device
Rotation center is overlapped with the pupil centre of optics module to be detected；
Wherein, the photographic device is rotated to different location around the pupil centre and is shot, so that the indication device
The graph card feature of upper different location after optics module to be detected, the center of the photographic device imaging sensor at
Picture.
2. the detection system of optics module parameter according to claim 1, which is characterized in that the detection system further includes
Turntable, the photographic device are set on the turntable.
3. the detection system of optics module parameter according to claim 1, which is characterized in that the detection system further includes
Lens barrel is carried, optics module to be detected is arranged close to described photographic device one end in the carrying lens barrel, and the carrying lens barrel is separate
The indication device is arranged in described photographic device one end.
4. the detection system of optics module parameter according to claim 1, which is characterized in that when the photographic device is in
When initial position, the optical axis of the photographic device is coaxial with the optical axis of optics module to be detected.
5. the detection system of optics module parameter according to claim 1-4, which is characterized in that the camera shooting dress
It sets including fuselage and the camera lens being set on fuselage, the camera lens is tight shot.
6. the detection system of optics module parameter according to claim 1-4, which is characterized in that the camera shooting dress
The field angle set is 3-5 degree, and focal distance is 0.8-3 meters.
7. the detection system of optics module parameter according to claim 1-4, which is characterized in that in the pupil
The heart is 13~15mm at a distance from the light-emitting surface of optics module to be detected.
8. a kind of detection method of optics module parameter, which is characterized in that the detection method of the optics module parameter includes such as
Lower step:
Control photographic device is rotated and is shot, so that the graph card feature on indication device is after optics module to be detected,
It is imaged in the center of the photographic device imaging sensor, wherein the rotation center of the photographic device and light to be detected
The pupil centre for learning mould group is overlapped；
Offset distance between the different graph card features and/or the photographic device are obtained from optics module optical axis to be detected position
Set the rotation angle of graph card characteristic imaging position；
The parameter information of optics module to be detected is obtained according to the offset distance and/or rotation angle.
9. the detection method of optics module parameter according to claim 8, which is characterized in that the ginseng of optics module to be detected
Number information includes at least one of effective focal length, optical distortion and field angle.
10. the detection method of optics module parameter according to claim 9, which is characterized in that
The graph card feature includes the benchmark graph card feature and the offset indication device positioned at the indication device center
The offset graph card feature of center；
When required detection parameters are effective focal length, the between the offset graph card feature and the benchmark graph card feature is obtained
One offset distance, and the first rotation angle of photographic device corresponding with the first offset distance；
The first focal length under each offset direction is obtained according to each first offset distance and the first rotation angle；
Using first focal length as the effective focal length of optics module to be detected.
11. the detection method of optics module parameter according to claim 9, which is characterized in that
The graph card feature includes the benchmark graph card feature and the offset indication device positioned at the indication device center
The offset graph card feature of center, wherein the offset graph card feature includes at least two；
When required detection parameters are effective focal length, the offset graph card feature on different offset directions and the benchmark are obtained
The first offset distance between graph card feature, and the first rotation angle of photographic device corresponding with the first offset distance；
The first focal length under each offset direction is obtained according to each first offset distance and the first rotation angle；
Using the average value of the first focal length under all offset directions as the effective focal length of optics module to be detected.
12. the detection method of optics module parameter according to claim 9 or 10, which is characterized in that
When required detection parameters are optical distortion, the institute at acquisition indication device center to region between the indication device edge
The second offset distance between offset graph card feature and the benchmark graph card feature is stated, and corresponding with second offset distance
Photographic device second rotation angle；
The second focal length is obtained according to second offset distance and with the second rotation angle；
The optical distortion of the optics module to be detected is obtained according to second focal length and the effective focal length.
13. the detection method of optics module parameter according to claim 9, which is characterized in that
It is pure white picture by the graph card feature replacement on the indication device when required detection parameters are field angle；
It controls the photographic device to rotate in a first direction, when the pure white picture is in the photographic device imaging sensor
When the gray value of imaging drops to preset range, the corresponding rotation angle of the photographic device is third rotation angle at this time for calibration
Degree；
It controls the photographic device to rotate in a second direction, when the pure white picture is in the photographic device imaging sensor
When the gray value of imaging drops to preset range, the corresponding rotation angle of the photographic device is the 4th rotation at this time for calibration
Gyration；Wherein, the party is to opposite with second direction；
Angle is rotated according to the third and the 4th rotation angle obtains the field angle of the optics module to be detected.
14. the detection method of optics module parameter according to claim 8, which is characterized in that described according to the offset
After the step of distance and rotation angle obtain the parameter information of optics module to be detected, further includes:
The optics module to be detected is controlled around the photographic device optical axis rotation and detects the optical mode to be detected again
The parameter information of group different cross section.
15. the detection method of optics module parameter according to claim 8, which is characterized in that the indication device is aobvious
The step of display screen, the offset distance obtained between the different graph card features includes:
Obtain the pel spacing number between the display screen matrix distance, and different graph card features；
The offset distance is obtained according to the element distance of the display screen image and pel spacing number.
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| CN201811423702.5A CN109596319A (en) | 2018-11-26 | 2018-11-26 | The detection system and method for optics module parameter |
| PCT/CN2018/122936 WO2020107586A1 (en) | 2018-11-26 | 2018-12-22 | Detection system and method for parameters of optical module |
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