CN109655236A - Sensor is as plane and lens interface faces parallel detection method and device - Google Patents
Sensor is as plane and lens interface faces parallel detection method and device Download PDFInfo
- Publication number
- CN109655236A CN109655236A CN201811616589.2A CN201811616589A CN109655236A CN 109655236 A CN109655236 A CN 109655236A CN 201811616589 A CN201811616589 A CN 201811616589A CN 109655236 A CN109655236 A CN 109655236A
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- light source
- plane
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- shadow
- barn door
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
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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
- G01M11/0207—Details of measuring devices
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Detect simple and convenient for operation the invention discloses a kind of, sensor is as plane and lens interface faces parallel detection method and device, including step A, plane mirror dispose, B, light source irradiation, C, shadow acquisition capture, D, depth of parallelism measuring and calculating.Detection method of the invention is simple, quick, easy to operate, and interference is low, can be achieved with automatic shadow collector as plane and lens interface faces parallel in the tested cold situation of camera using light beam principle of turning back；By as plane and lens interface faces parallel detect, carrying out grade classification to camera according to testing result to finished product camera, substandard product is rejected, guarantees to prevent same money camera from the defect ware of image quality difference occur with money camera imaging consistency；And high-precision quantizating index data are provided, it is convenient for subsequent improvement production technology, improves the manufacturing quality of product, produces the camera of high quality imaging.
Description
Technical field
The invention belongs to camera imaging technical field of quality detection, and in particular to a kind of sensor is as plane and lens interface
Faces parallel detection method and device.
Background technique
High-volume with industrial camera in field of machine vision uses, and constantly mentions to the coherence request of camera imaging
It is high.In industrial camera use process, it is very important measurement standard with money camera imaging consistency, and camera image senses
Device is an important indicator for guaranteeing camera imaging consistency again as plane and lens interface faces parallel.Currently, this refers to
It marks and is determined substantially by machining and component welding precision, there is no carry out to this index for most camera manufacturers
Test, causes same money camera to have very large deviation due to the discreteness bring image quality of this index.Existing detection mode
It is: puts scaling board and camera in fixed position, camera loads onto fixed focus lens and is powered, scaling board is imaged, obtains
The image transmitting arrived is to computer.In the case of parallel relative to lens interface end face as plane, entire image can reach simultaneously
To clear state；The case where for picture plane (having certain tilt angle) not parallel relative to lens interface end face, whole picture figure
Partial region obscures as in, partial region understands, i.e., it cannot be guaranteed that image each region is clear simultaneously, screens in this, as camera
The criterion used.
Above-mentioned detection mode needs multiple calibration links there are detection method complexity, for example, scaling board pattern and specification,
The positioning of camera and image fog-level algorithm；It cannot get quantized result；It attached the factor for influencing camera measurement result, example
The imaging precision of camera lens as used itself, it will cause erroneous judgements, and it is low to detect reliability.
Therefore, a kind of easy to use, quick, sensor that detection accuracy is high is developed as plane is parallel with lens interface end face
Spending detection method is the key that solve the problems, such as.
Summary of the invention
The purpose of the present invention first is designed to provide a kind of sensor as plane and lens interface faces parallel detect
Method, second is designed to provide a kind of device for detection sensor as plane and camera lens faces parallel.
The first object of the present invention is achieved in that including step A, plane mirror placement, B, light source irradiation, C, light
Shadow acquisition capture, D, depth of parallelism measuring and calculating, the specific steps are
A, plane mirror disposes, and plane mirror is mounted on the rear end face of barn door, and adjustment makes plane reflection
The centre of mirror and the loophole of barn door are on same axis；
B, irradiation light is calibrated, and starting light source penetrates the loophole irradiated plane reflecting mirror of barn door, then adjusts light source
Irradiating angle, the hot spot for reflexing to plane mirror on the aobvious screen of shadow positioning position the light hole on aobvious screen with shadow and are overlapped,
I.e. barn door is vertical with the injection light of light source, and fixed light source；
C, shadow acquisition capture, removes plane mirror, and tested camera is placed on detection fixture, starts tested phase
Machine makes to be tested magazine imaging sensor and position to show to shadow through the loophole of barn door to shield projected spot, shadow acquisition
Device then shoots the hot spot being shown on the aobvious screen of shadow positioning at image together with light hole；
D, the depth of parallelism is calculated, in the image that shoots of measuring and calculating shadow collector spot center to light hole center distance R,
Measure the distance L that the aobvious screen of shadow positioning arrives barn door, finally using acquired R, L numerical value can calculate camera as plane with
As a result lens interface faces parallel calculates:
Alpha (depth of parallelism) in formula is angle of the camera image sensor as plane and lens interface end face.
The second object of the present invention is achieved in that fixed including the light source adjustment frame, the shadow that are set in turn in rack
Position shows screen, barn door, plane mirror and detection fixture, and light source, the aobvious screen of shadow positioning are arranged on the light source adjustment frame
Be provided centrally with light hole, corresponded on the barn door light hole setting loophole, the axial line weight of light hole and loophole
It closes, the top of the barn door is provided with the shadow collector that taking lens is directed toward the aobvious screen of shadow positioning.
Compared with prior art, the present invention has following technical effect that
1, the present invention by finished product camera image sensor as plane and lens interface faces parallel detect, root
Grade classification is carried out to camera according to testing result, rejects substandard product, guarantees to prevent same money phase with money camera imaging consistency
There is the defect ware of image quality difference in machine；
2, detection method of the invention is turned back principle using light beam, in the tested cold situation of camera, it can be achieved that oneself
Shadow collector is moved as plane and lens interface faces parallel, and provides high-precision quantizating index data；
3, detection method of the invention is simple, quick, easy to operate, and interference is low, and examined data measured precision is high；It can basis
The testing result data target for statistical analysis quantified is convenient for subsequent improvement production technology, improves the manufacture matter of product
Amount produces the camera of high quality imaging.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of apparatus of the present invention；
Fig. 2 is use state of the invention with reference to figure；
Fig. 3 is that the depth of parallelism calculates schematic diagram in the present invention；
Fig. 4 is the structural schematic diagram of light source adjustment frame in the present invention；
Fig. 5 is the structural schematic diagram that fixture is detected in the present invention；
Figure label: 1~rack, 2~light source adjustment frame, 2a~light source adjustment base, 2b~light source sliding block, 2c~transverse direction
Adjusting bracket, 2d~vertical adjustment frame, 2e~shaft, 2f~rotating handle, 3~light source, the aobvious screen of 4~shadow positioning, 4a~light hole, 5
~barn door, 5a~loophole, 6~shadow collector, 7~plane mirror, 8~detection fixture, 8a~detection adjustment base,
8b~detection light source sliding block, 8c~height regulating rod, 8d~phase machine clamp, 8e~fixed mandril, 9~it is tested camera, 10~figure
As sensor.
Specific embodiment
The present invention will be further described below with reference to the drawings, but the present invention is limited in any way, base
In present invention teach that it is made it is any transform or replace, all belong to the scope of protection of the present invention.
The sensor as shown in attached drawing 1~5 is including step A, flat as plane and lens interface faces parallel detection method
The placement of face reflecting mirror, B, light source 3 irradiate, C, shadow acquisition capture, D, depth of parallelism measuring and calculating, the specific steps are
A, plane mirror disposes, and plane mirror 7 is mounted on the rear end face of barn door 5, and adjusting keeps plane anti-
The loophole 5a of the central point and barn door 5 of penetrating mirror 7 is on same axis；
B, irradiation light is calibrated, and starting light source 3 is then adjusted through the loophole 5a irradiated plane reflecting mirror 7 of barn door 5
3 irradiating angle of light source, the hot spot and shadow for reflexing to plane mirror 7 on the aobvious screen 4 of shadow positioning, which position, goes out light on aobvious screen 4
Hole 4a is overlapped, i.e., barn door 5 is vertical with the injection light of light source 3, and fixed light source 3；
C, shadow acquisition capture, removes plane mirror 7, and tested camera 9 is placed on detection fixture, light source 3 is started,
The imaging sensor 10 in tested camera 9 is set to position 4 projected spots of aobvious screen, shadow to shadow through the loophole 5a of barn door 5
Collector 6 then shoots the hot spot being shown on the aobvious screen 4 of shadow positioning at image together with light hole 4a；
D, the depth of parallelism is calculated, in the image that shoots of measuring and calculating shadow collector 6 spot center to the center light hole 4a away from
From R, the distance L that the aobvious screen 4 of shadow positioning arrives barn door 5 is measured, finally can calculate to obtain camera picture using acquired R, L numerical value
As a result plane and lens interface faces parallel calculate:
Alpha (depth of parallelism) in formula is angle of the camera as plane and lens interface end face.
It is close to barn door 5, and lens interface end face and shading in the lens interface end face that camera 9 is tested in the step C
The loophole 5a of plate 5 is on same axis.
The lens interface end face that camera 9 is tested in the step C becomes placed against with 5 plane of barn door.
Provided by the present invention for detection sensor as the device of plane and camera lens faces parallel, including it is set in turn in
Light source adjustment frame 2, the aobvious screen 4 of shadow positioning, barn door 5, plane mirror 7 and detection fixture 8 in rack 1, the light source tune
Light source 3 is set on whole frame 2, and the aobvious screen 4 of shadow positioning is provided centrally with light hole 4a, corresponds to light on the barn door 5
Loophole 5a is arranged in hole 4a, and light hole 4a is overlapped with the axial line of loophole 5a, and the top of the barn door 5 is provided with shooting
Camera lens is directed toward the shadow collector 6 of the aobvious screen 4 of shadow positioning.
The barn door 5 and shadow positioning aobvious screen 4 spacing setting, the spacing of the two are not less than 5cm.
The aperture of the loophole 5a is not less than the diameter of the lens interface end face of tested camera 9.
The light source 3 is laser, and the injection light of the light source 3 is colour, and the aobvious screen 4 of shadow positioning is not
Transparent panel.
Diameter of the aperture of the light hole 4a not less than laser transmitting optical port；The aperture of the loophole 5a is big
In the aperture of light hole 4a.
The light source adjustment frame 2 includes light source adjustment base 2a, lateral adjustments frame 2c, vertical adjustment frame 2d, the light
Source adjustment base 2a is set in rack 1, and the lateral adjustments frame 2c is set to light source adjustment base 2a by light source sliding block 2b
On, light source sliding block 2b is slidably matched with light source adjustment base 2a, and light source sliding block 2b can be moved back and forth horizontally along light source adjustment base 2a
Dynamic, the vertical adjustment frame 2d is set on lateral adjustments frame 2c by shaft 2e, and any shaft 2e is pierced by lateral adjustments frame 2c
The dynamic cooperation of rotating handle 2f, shaft 2e and lateral adjustments frame 2c is connected, shaft 2e supports vertical adjustment frame 2d on lateral adjustments frame 2c
Do the flip-flop movement of vertical direction.
The detection fixture 8 includes detection adjustment base 8a, height regulating rod 8c and phase machine clamp 8d, the detection
Adjustment base 8a is set in rack 1, and the height regulating rod 8c is set to detection adjustment base by detecting light source sliding block 8b
On 8a, detection light source sliding block 8b is slidably matched with detection adjustment base 8a, and detection light source sliding block 8b can be along light source adjustment base 2a
Mobile back and forth horizontally, the phase machine clamp 8d is set to the top of height regulating rod 8c.
The height regulating rod 8c is telescopic rod.
The " U "-shaped structure of phase machine clamp 8d, is provided with fixed mandril 8e.
The shadow collector 6 is video camera.
Working principle and the course of work of the present invention:
Step 1: light source 3 being fixedly installed on the vertical adjustment frame 2d of light source adjustment frame 2, starting light source 3 emits beam；
Step 2: being close to 5 rear end holding plane reflecting mirror 7 of barn door；
Step 3: adjustment light source sliding block 2b is moved horizontally along light source adjustment base 2a, makes 3 face light hole 4a of light source, is adjusted
Vertical adjustment frame 2d is overlapped light source 3 and the axial line of light hole 4a, so that reflecting plane mirror 7 is being radiated at light
Hot spot on the aobvious screen 4 of shadow positioning is overlapped with light hole 4a, and barn door 5 is vertical with the injection light of light source 3 at this time, subsequent fixed lateral
Adjusting bracket 2c, vertical adjustment frame 2d and barn door 5；
Step 4: plane mirror 7 is removed, so that the lens interface end face of tested camera 9 is close to barn door 5 and places, adjustment inspection
Surveying light source sliding block 8b and moving horizontally along detection adjustment base 8a makes tested 9 face loophole 5a of camera, adjusts height regulating rod 8c,
The lens interface end face and loophole 5a for making tested camera 9 are on same axis, and can be shown on the aobvious screen 4 of shadow positioning from quilt
10 image planes of imaging sensor and the reflected hot spot of 10 glass window of imaging sensor and image of survey camera 9；
Step 5: starting shadow collector 6 be shown in the hot spot on the aobvious screen 4 of shadow positioning together with light hole 4a shooting at
Image, according to flare center on the captured aobvious screen 4 of image calculating shadow positioning to the maximum distance at the center light hole 4a
R；
Step 6: measuring the distance L that the aobvious screen 4 of shadow positioning arrives barn door 5, calculate the camera of tested camera 9 as plane and mirror
Head interface faces parallel, calculation formula are as follows:
Step 7: the depth of parallelism of the tested camera 9 is analyzed according to calculated result, the depth of parallelism numerical value the big, shows that this is tested
The image quality of camera 9 is poorer, more unstable, image quality height and stabilization on the contrary then that show the tested camera 9.
Claims (10)
1. a kind of sensor is disposed as plane and lens interface faces parallel detection method, including step A, plane mirror,
B, light source irradiates, C, shadow acquisition capture, D, depth of parallelism measuring and calculating, it is characterised in that: the specific steps are
A, plane mirror disposes, and plane mirror (7) is mounted on the rear end face of barn door (5), and adjusting keeps plane anti-
The loophole (5a) of the central point and barn door (5) of penetrating mirror (7) is on same axis；
B, irradiation light is calibrated, and starting light source (3) penetrates loophole (5a) the irradiated plane reflecting mirror (7) of barn door (5), then
Light source (3) irradiating angle is adjusted, the hot spot and shadow positioning for reflexing to plane mirror (7) on the aobvious screen (4) of shadow positioning are aobvious
The light hole (4a) shielded on (4) is overlapped, i.e., barn door (5) is vertical with the injection light of light source (3), and fixed light source (3)；
C, shadow acquisition capture, removes plane mirror (7), and tested camera (9) is placed on detection fixture, light source is started
(3), the imaging sensor (10) in tested camera (9) is made to position aobvious screen (4) to shadow through the loophole (5a) of barn door (5)
Flare, shadow collector (6) then shoot the hot spot being shown on the aobvious screen (4) of shadow positioning at figure together with light hole (4a)
Picture；
D, the depth of parallelism is calculated, in measuring and calculating shadow collector (6) image for shooting spot center to the center light hole (4a) away from
From R, the distance L that the aobvious screen (4) of shadow positioning arrives barn door (5) is measured, finally can calculate to obtain phase using acquired R, L numerical value
As a result machine is calculated as plane and lens interface faces parallel:
Alpha (depth of parallelism) in formula is angle of the camera image sensor as plane and lens interface end face.
2. sensor according to claim 1 is as plane and lens interface faces parallel detection method, it is characterised in that:
Barn door (5) are close in the lens interface end face that camera (9) are tested in the step C, and lens interface end face and barn door (5)
Loophole (5a) be on same axis.
3. sensor according to claim 1 is as plane and lens interface faces parallel detection method, it is characterised in that:
The lens interface end face that camera (9) are tested in the step C becomes placed against with barn door (5) plane.
4. it is a kind of for detection sensor as the device of plane and camera lens faces parallel, it is characterised in that: including setting gradually
In light source adjustment frame (2), the aobvious screen (4) of shadow positioning, barn door (5), plane mirror (7) and detection fixture on rack (1)
(8), light source (3) being set on the light source adjustment frame (2), the aobvious screen (4) of shadow positioning is provided centrally with light hole (4a),
Light hole (4a) setting loophole (5a), the axial line weight of light hole (4a) and loophole (5a) are corresponded on the barn door (5)
It closes, the top of the barn door (5) is provided with the shadow collector (6) that taking lens is directed toward the aobvious screen (4) of shadow positioning.
5. the detection sensor according to claim 4 that is used for is as the device of plane and camera lens faces parallel, feature exists
In: the barn door (5) and aobvious screen (4) the spacing setting of shadow positioning, the spacing of the two are not less than 5cm.
6. the detection sensor according to claim 4 that is used for is as the device of plane and camera lens faces parallel, feature exists
In: the aperture of the loophole (5a) is not less than light source projects in tested camera image sensor as the hot spot in plane is straight
Diameter.
7. the detection sensor according to claim 4 that is used for is as the device of plane and camera lens faces parallel, feature exists
In: the light source (3) is laser, and the injection light of the light source (3) is single wavelength, the aobvious screen (4) of shadow positioning
For to the impermeable isotropic disk of the high diffusing reflection of optical source wavelength.
8. the detection sensor according to claim 4 that is used for is as the device of plane and camera lens faces parallel, feature exists
In: diameter of the aperture of the light hole (4a) not less than laser transmitting optical port；The aperture of the loophole (5a) is big
In the aperture of light hole (4a).
9. the detection sensor according to claim 4 that is used for is as the device of plane and camera lens faces parallel, feature exists
In: the light source adjustment frame (2) include light source adjustment base (2a), lateral adjustments frame (2c), vertical adjustment frame (2d), it is described
Light source adjustment base (2a) is set on rack (1), and the lateral adjustments frame (2c) is set to light source by light source sliding block (2b)
On adjustment base (2a), light source sliding block (2b) is slidably matched with light source adjustment base (2a), and light source sliding block (2b) can be along light source tune
Pedestal (2a) movement back and forth horizontally is saved, the vertical adjustment frame (2d) is set on lateral adjustments frame (2c) by shaft (2e),
Any shaft (2e) is pierced by lateral adjustments frame (2c) connection rotating handle (2f), shaft (2e) and lateral adjustments frame (2c) dynamic cooperation, turns
The yaw motion of vertical direction is done in axis (2e) support vertical adjustment frame (2d) on lateral adjustments frame (2c).
10. the detection sensor according to claim 4 that is used for is as the device of plane and camera lens faces parallel, feature exists
In: the detection fixture (8) includes detection adjustment base (8a), height regulating rod (8c) and phase machine clamp (8d), the inspection
It surveys adjustment base (8a) to be set on rack (1), the height regulating rod (8c) is set to inspection by detecting light source sliding block (8b)
It surveys on adjustment base (8a), detection light source sliding block (8b) is slidably matched with detection adjustment base (8a), detects light source sliding block (8b)
Can be mobile back and forth horizontally along light source adjustment base (2a), the phase machine clamp (8d) is set to the top of height regulating rod (8c).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811616589.2A CN109655236A (en) | 2018-12-28 | 2018-12-28 | Sensor is as plane and lens interface faces parallel detection method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811616589.2A CN109655236A (en) | 2018-12-28 | 2018-12-28 | Sensor is as plane and lens interface faces parallel detection method and device |
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| Publication Number | Publication Date |
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| CN109655236A true CN109655236A (en) | 2019-04-19 |
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ID=66117204
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811616589.2A Pending CN109655236A (en) | 2018-12-28 | 2018-12-28 | Sensor is as plane and lens interface faces parallel detection method and device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111220095A (en) * | 2019-12-06 | 2020-06-02 | 凌云光技术集团有限责任公司 | Method and device for detecting verticality of optical axis of divergent light beam with high precision |
| CN111570639A (en) * | 2020-05-25 | 2020-08-25 | 珠海格力智能装备有限公司 | Positioning detection mechanism and pipe expander with same |
| CN112902841A (en) * | 2021-01-25 | 2021-06-04 | 上海兰宝传感科技股份有限公司 | Size measurement sensor with deviation correction function |
| CN114266834A (en) * | 2021-11-30 | 2022-04-01 | 珠海广浩捷科技股份有限公司 | Multi-camera relative angle calibration method |
| CN115390355A (en) * | 2022-08-26 | 2022-11-25 | 上海广智光学实业有限公司 | Image adjusting device |
| EP3985446B1 (en) | 2020-10-14 | 2023-05-24 | The Swatch Group Research and Development Ltd | Device for determining the position of a clock display |
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- 2018-12-28 CN CN201811616589.2A patent/CN109655236A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111220095A (en) * | 2019-12-06 | 2020-06-02 | 凌云光技术集团有限责任公司 | Method and device for detecting verticality of optical axis of divergent light beam with high precision |
| CN111220095B (en) * | 2019-12-06 | 2021-08-03 | 凌云光技术股份有限公司 | Method and device for detecting verticality of optical axis of divergent light beam with high precision |
| CN111570639A (en) * | 2020-05-25 | 2020-08-25 | 珠海格力智能装备有限公司 | Positioning detection mechanism and pipe expander with same |
| EP3985446B1 (en) | 2020-10-14 | 2023-05-24 | The Swatch Group Research and Development Ltd | Device for determining the position of a clock display |
| CN112902841A (en) * | 2021-01-25 | 2021-06-04 | 上海兰宝传感科技股份有限公司 | Size measurement sensor with deviation correction function |
| CN114266834A (en) * | 2021-11-30 | 2022-04-01 | 珠海广浩捷科技股份有限公司 | Multi-camera relative angle calibration method |
| CN114266834B (en) * | 2021-11-30 | 2024-06-04 | 珠海广浩捷科技股份有限公司 | Multi-camera relative angle calibration method |
| CN115390355A (en) * | 2022-08-26 | 2022-11-25 | 上海广智光学实业有限公司 | Image adjusting device |
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Effective date of registration: 20191112 Address after: 650300 Taiping new town sub district office, Anning City, Kunming City, Yunnan Province Applicant after: Yunnan Anning Chemical Plant Co., Ltd Address before: 650300 Industrial Park of Street Office of Taiping New Town, Anning City, Kunming City, Yunnan Province Applicant before: Yunnan vision intelligent equipment Co., Ltd. |
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Application publication date: 20190419 |