CN108761831A - A kind of quick punching device and method of high-precision optical camera lens - Google Patents
A kind of quick punching device and method of high-precision optical camera lens Download PDFInfo
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- CN108761831A CN108761831A CN201810419929.6A CN201810419929A CN108761831A CN 108761831 A CN108761831 A CN 108761831A CN 201810419929 A CN201810419929 A CN 201810419929A CN 108761831 A CN108761831 A CN 108761831A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 170
- 238000004080 punching Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 47
- 238000011378 penetrating method Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 4
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- 230000000007 visual effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 5
- 230000004069 differentiation Effects 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/32—Fiducial marks and measuring scales within the optical system
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Abstract
The present invention relates to a kind of quick punching device and methods of high-precision optical camera lens, mainly solution prior art operation is cumbersome, applicable surface is narrow, and the problems such as there are security risks, the punching especially suitable for short focus of the optical lens focal length from several millimeters to tens millimeter, big visual field optical lens.The punching device of the present invention includes horizontally disposed optics guide rail, the first, second Metal pylon, optical lens, detector and and monitor；The first, second Metal pylon of optical lens is arranged on optics guide rail by sliding block and is respectively positioned on the side of optical lens；Detector is arranged in the other side of optical lens；Setting flag A on optical lens first object holder, setting flag C on the second Metal pylon mark the center of A and the center of label C to be located on same level straight line；Second Metal pylon lower part is hinged with sliding block；Optical lens is mounted on by combining mobile station on optics guide rail；Optical lens detector is mounted on by mobile device on optical lens.
Description
Technical field
The invention belongs to optical imagery and field of measuring technique, be related to a kind of quick punching device of high-precision optical camera lens and
Method.
Background technology
So-called optics punching refers to overlapping the image plane center of optical system with detector center.
During the problem of being frequently encountered optics punching in the actual work, such as optical system distortion correction, need
It to give follow-up distortion correction to provide reference point in advance, optics image plane center need to be overlapped with the adjustment of detector center.Based on figure
In the optical measurement application of picture, it is also desirable to overlap optics with the adjustment of detector center, be missed to eliminate the measurement thereby resulted in
Difference.
Currently, the punching of optical lens, ununified system and method, for different types of optical lens, due to
Its structure type, complexity are different, and there is also differences for optical lens penetrating method.
The method of existing optical lens punching mainly has autocollimation method and rotary optical camera lens method.
Autocollimation method realizes punching using autocollimator and the preferable speculum of flatness.Speculum need to be glued when punching
It is attached to the optical lens endface for requiring punching, and assumes end face with optical lens optical axis coincidence or by processing method of feeling relieved
Ensure that the end face is vertical with optical lens optical axis, adjusting optical lens or autocollimator makes plane mirror cross reflection image and light
Cross target overlaps in pipe, and to realize that light pipe optical axis is parallel with optical lens optical axis, the cross picture that light pipe is sent out at this time is through light
It is optics image plane center after lens imaging, then detector center is coincided with, is finally completed optical lens punching process.
Autocollimation method is cumbersome, has selectivity to punching optical lens, the optical lens assembled is needed prior
The reference plane of speculum is pasted in selection, and requires reference plane vertical with optical axis, this is relatively difficult to achieve in practice, and can not
Realize the punching to arbitrary optical lens.
In rotary optical camera lens method, optical lens links together with detector, its entirety is clipped in machine tool rotary axis card
On head, after camera power-up, complete machine rotates feelings in lathe upper rotary, the crosshair that observation light pipe is sent out through optical lens imaging
Condition finally makes the cross picture that camera looks into fee arrives not in the rotation with camera by adjusting light pipe orientation or camera pitching, orientation
And rotate, light pipe optical axis and optical lens optical axis coincidence at this time, cross inconocenter is image plane center, then by detector and light
Camera lens separation is learned, detector center is overlapped with the adjustment of the inconocenter of light pipe crosshair.
Rotary optical camera lens method is suitable only for the punching of the longer small optical lens of focal length, need to fill optical lens and detector
It is clipped on lathe, hot line job danger is bigger.On the one hand, in order to see the picture of light pipe crosshair, light pipe focal length and bore clearly
It need to be matched with optical lens；On the other hand, after determining image plane center, detector position need to be adjusted on lathe, not only risk
Greatly, nor it is easy to operate.
Invention content
Existing optical lens punching device and method is cumbersome, applicable surface is narrow the purpose of the present invention is being directed to, Yi Jicun
The security risk the problems such as, and provide a kind of quick punching device and method of high-precision optical camera lens.The system and method is special
Suitable for the punching of short focus of the optical lens focal length from several millimeters to tens millimeter, big visual field optical lens, there is operation letter
Single, efficient, practical, precision height, does not need parallel light tube, speculum and reference plane is not necessarily to, to optical lens size, structure type
Etc. non-selectivities.
To achieve the above object, technical solution provided by the invention is：A kind of quick punching device of high-precision optical camera lens,
It is characterized in that, including horizontally disposed optics guide rail, first object holder, the second Metal pylon, optical lens, detection
Device and the monitor being connected with detector；The first object holder and the second Metal pylon are arranged by sliding block in optics guide rail
Side that is upper and being respectively positioned on optical lens, the second Metal pylon is between first object holder and optical lens；Detector is set
It sets in the other side of optical lens；Setting flag A on the first object holder, setting flag C on the second Metal pylon, label
The center of A and the center of label C are located on same level straight line；Second Metal pylon lower part is hinged with sliding block；The optical frames
Head is mounted on by combining mobile station on optics guide rail, can three-dimensional mobile and rotation；The detector is installed by mobile device
On optical lens, it can be translated relative to optical lens along the optical axis direction of vertical optical camera lens.
Further, above-mentioned monitor is display area self-generating electricity crosshair monitor.
Further, above-mentioned label A and label C is crosshair figure.
In addition, the present invention also provides a kind of quick penetrating method of high-precision optical camera lens, it is characterized in that, including with
Lower step：
1) the quick punching device of above-mentioned high-precision optical camera lens is built；Optical lens height is adjusted, the height of its optical axis is made
It is identical as the height of straight line where label A, label C；
2) object distance between first object holder, the second Metal pylon and optical lens is adjusted separately, label A, label C are made
It is respectively positioned in the field depth of optical lens, makes it in detector image planes blur-free imaging；
3) optical lens and detector are adjusted it by record picture point a, picture point c as a whole in the image planes position of detector
Left and right position makes picture point c and picture point a be located on same plumb line in the image that monitor image planes are shown；
4) record picture point a, positions of the picture point c in detector, adjust it by optical lens and detector and bow as a whole
Elevation angle degree and relative to the height for marking A, marking C, makes the figures that are shown in monitor of picture point c of the picture point a and label C of label A
It is overlapped as in；
5) keep optical lens position constant, the optical axis direction along vertical optical camera lens translates detector, make its center with
The picture point c of C is marked to overlap.
Further, step 2) is as follows：
2.1) object distance between the second Metal pylon and optical lens is adjusted, label C is made to be located at the depth of field model of optical lens
In enclosing；
2.2) the second Metal pylon is rotated, the object distance between first object holder and optical lens is adjusted, label A is made to be located at
In the field depth of optical lens；
Further, step 3) is as follows：
3.1) then recording mark C rotates the second Metal pylon, recording mark A in the positions picture point c of detector image planes
In the positions picture point a of detector image planes；
3.2) by optical lens and detector, left and right translates as a whole, while adjusting its optical axis and being allowed to and label A, label
The line coincident of C；
3.3) step 3.1) and step 3.2) are repeated, until picture point c and picture point a is located at the same vertical of monitor image planes
On line.
Further, step 4) is as follows：
4.1) then recording mark C rotates the second Metal pylon, recording mark A in the positions picture point c of detector image planes
In the positions picture point a of detector image planes；
4.2) by optical lens and detector adjust as a whole its pitch angle and relative to mark A, mark C height
Degree；
4.3) step 4.1) and step 4.2) are repeated, until the picture point c of the picture point a of label A and label C are in monitor image planes
Upper coincidence；It is optical lens optics image plane center to mark the picture point c of C.
In order to further increase punching precision, after step 5), in optical lens field depth, mobile first object branch
Frame and the second target repeat step 1) to step 5), until essence to increase the distance between first object holder and the second target
Degree no longer improves.
The punching principle of the present invention：
It is located at same straight line referring to Fig. 3, point A, C, first object holder AB and the second Metal pylon CD are through optical lens
Imaging is respectively ab and cd.When point A, C are respectively positioned on optical axis, their picture point a, c is also on optical axis.When the light of optical lens
When axis is parallel with AC lines and coaxial with AC, the barycenter that picture point a, c projects in detector image planes formed by 2 points of A, C overlaps,
The centroid position is optical lens image plane center at this time.If detector is located at c points position, optics image plane center is picture point
The positions c.
Monitor center for observing image generates an electric crosshair, which corresponds in detector
The heart.Distance of the detector relative to optical lens is adjusted, so that the picture point c of detector is overlapped with electric center of reticule, you can to realize
Optical lens punching.
Compared with prior art, it is an advantage of the invention that：
1, high-precision camera lens punching device and method provided by the invention solves camera lens (especially short focus mirror well
Head) with the punching problem of detector.
2, high-precision camera lens punching device and method provided by the invention does not need parallel light tube, is not necessarily to speculum and benchmark
Face directly can realize high-precision optical lens punching to non-selectivities such as camera lens size, structure types by image interpretation；
Punching precision is high, easy to operate, efficient, practical.
3, high-precision camera lens punching device and method provided by the invention especially suitable for lens focus from several millimeters to several
The punching of ten millimeters of short focus, big visual field camera lens.
Description of the drawings
Fig. 1 is the structural schematic diagram of optical lens punching device of the present invention；
Fig. 2 is the second Metal pylon and its rotation schematic diagram；
Fig. 3 is the optical lens punching principle schematic of the present invention；
Fig. 4 is eccentric error schematic diagram caused by first object holder and the second Metal pylon difference in height；
Fig. 5 is the error schematic diagram caused by the interpretation of center；
Fig. 6 is error schematic diagram caused by pseudo- centering；
Fig. 7 is error schematic diagram caused by magnifying power.
Each label is described as follows in figure：
1-optics guide rail, 2-first object holders, the 3-the second Metal pylon, 4-combination mobile stations, 5-optical frames
Head, 6-detectors, 7-monitors.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and examples.
As shown in Figure 1, the present invention provides a kind of quick punching device of high-precision optical camera lens, including horizontally disposed optics
Guide rail 1, first object holder 2, the second Metal pylon 3, optical lens 5, detector 6 and the monitor 7 being connected with detector 6；
Monitor 7 is display area self-generating electricity crosshair monitor.
First object holder 2 and the second Metal pylon 3 are arranged on optics guide rail 1 by sliding block and are respectively positioned on optical lens
5 side, the second Metal pylon 3 is between first object holder 2 and optical lens 5；Detector 6 is arranged in optical lens 5
The other side；Setting flag A on first object holder 2, setting flag C on the second Metal pylon 3, label A and label C are ten
Word silk figure；The center and the center of label C for marking A are located on same level straight line；It is cut with scissors with sliding block second Metal pylon, 3 lower part
It connects, can be rotated (referring to Fig. 2) relative to sliding block；Optical lens 5 is mounted on by combining mobile station 4 on optics guide rail 1, can be three-dimensional
Mobile and rotation；Detector is mounted on by bolt on the flange of optical lens, is realized along vertical light by the slot hole on flange
The optical axis direction for learning camera lens 5 is translated relative to optical lens 5.
The present invention also provides a kind of quick penetrating methods of high-precision optical camera lens, include the following steps：
1) it builds such as the quick punching device of above-mentioned high-precision optical camera lens；5 height of optical lens is adjusted, the height of its optical axis is made
Degree is identical as the height of straight line where label A, label C；
2) so that label A, label C is respectively positioned in the field depth of optical lens 5, make it in 6 image planes blur-free imaging of detector,
It is as follows：
2.1) object distance between the second Metal pylon 3 and optical lens 5 is adjusted, label C is made to be located at the depth of field of optical lens 5
In range；
2.2) the second Metal pylon 3 is rotated, the object distance between adjustment first object holder 2 and optical lens 5 makes label A
In the field depth of optical lens 5；
3) so that picture point c and picture point a is located on same plumb line in the image that monitor 7 is shown, be as follows：
3.1) then recording mark C rotates the second Metal pylon 3, record mark in the positions picture point c of 6 image planes of detector
Remember A in the positions picture point a of 6 image planes of detector；
3.2) by the 6 integral left right translation of optical lens 5 and detector, while optical lens 5 and detector 6 are rotated left and right,
Adjust the line coincident that its optical axis is allowed to and marks A, marks C；
3.3) step 3.1) and step 3.2) are repeated；
4) so that the picture point c of the picture point a and label C of label A is overlapped in the image that monitor 7 is shown, be as follows：
4.1) then recording mark C rotates the second Metal pylon 3, record mark in the positions picture point c of 6 image planes of detector
Remember A in the positions picture point a of 6 image planes of detector；
4.2) by optical lens 5 and detector 6 adjust as a whole its pitch angle and relative to label A, label C it is upper
Lower height；
4.3) step 4.1) and step 4.2) are repeated；
5) keep 5 position of optical lens constant, the optical axis direction along vertical optical camera lens translates detector 6, makes its center
It is overlapped with the picture point c of label C.
After step 5), optical lens punching is completed, and can shoot picture point photo, reads monitor crosshair coordinate in photo
With picture point a or picture point c coordinates, deviation by comparing obtains optical lens punching precision.
Punching error analysis：
Punching device and method provided by the invention, error are mostly derived from center and differentiate error, first object holder and the
The height error of two Metal pylons, pseudo- centering error, detector heeling error, magnification errors etc..
Each symbol definition appeared below is as follows：
L is first object holder at a distance from the second Metal pylon；
L1For the distance of first object holder to optical lens；
L2For the distance of the second Metal pylon to optical lens；
H is first object holder and the second Metal pylon is the difference in height at cross mark center, and h ' is its picture point；
F ' is optical lens focal length；
A, b, c, d are respectively A, B, C, the picture point of D；
Δ is the defocusing amount of the image planes opposing detector position of ab；
A ' is the projected position of a points on the detector.
1) error delta caused by the difference in height of first object holder and the second Metal pylon1
Referring to Fig. 4, label first object holder upper and lower ends point is A, B, and label the second Metal pylon upper and lower ends point is
C,D.For convenience of description, first object holder is denoted as AB, the second Metal pylon is denoted as CD.
Detector position can be located at AB, CD any of which image planes, may be alternatively located at the practical focusing image planes of optical lens, this
Sample generates defocusing amount Δ for AB, CD image planes opposing detector position.
If detector is located at the image planes ca ' of CD, there are axial defocusing amount Δ, point a for the image planes ab opposing detectors of AB
It is projected as a ' in detector image planes, which is h ' with practical image plane center bias
Photographic lens, due to L1>>F ', image planes are located near focal plane.In addition, first object holder AB, the second target branch
Frame CD is located in the optical system depth of field, and defocusing amount Δ should be less than half depth of focus of camera, i.e. formula：
Δ≤±a×F
A is Pixel size, and F is optical system aperture
As the above analysis：When optical lens punching, the distance between two target objects and optical lens are bigger, punching
Precision is higher.
2) center registration parallax error δ2
Human eye or image judgment object or electric center of reticule and electric center of reticule overlap the deviation of degree.The coincidence
Degree parallax error includes, and the differentiations of two target object picture point registrations and picture point overlap the differentiation of degree with electricity center of reticule.
As shown in Figure 5.
When C points are located at image plane center, the picture point a of A is projected as a ' in detector target surface, and point c deviations are h ', by public affairs
Formula can be calculated：
H '=β × f '
Work as h ' and is less than parallax error δ2When, still there may be inclined light shaft angle β.
As the above analysis：Spacing between object CD and optical lens is bigger, and height is lower, and punching precision is higher.
3) pseudo- centering error δ3
When optical axis angle β is proportional to two target object AB, CD height, there is pseudo- centering situation.Puppet centering is actually
It is that the difference in height of optical lens optical axis and object vertex and two articles oneself height difference collective effect generate.Puppet centering is such as
Shown in Fig. 6：
From the graph as can be seen that picture a ' (c) of A, C overlap at image space, if electric center of reticule is overlapped with a ' (c),
Pseudo- center a ' (c) and image planes practical center d point deviations are h '.
From formula：
It acquires：
I.e.：
General photographic lens L1>>F ', difference very little after difference in height Δ h is adjusted by precision apparatus, therefore Δ h ' very littles,
Substantially can ignore.
As the above analysis：The distance between target and optical lens L1Bigger, two target object difference in height Δ h are got over
Small, Δ h ' is smaller, can substantially eliminate pseudo- centering, improves punching precision.
4) picture point offsets in height error delta caused by detector tilts4
Detector tilts the standoff height for causing picture point on detector target surface with optical axis out of plumb and generates variation and generate
Error.
When detector tilts excessive, image will obscure, and maximum axial displacement amount caused by detector tilts is half times
Depth of focus Δ, then：
General L1>>H, optical system depth of focus also very little, δ4It is negligible.In order to reduce δ4, object distance should be increased as far as possible
L1。
5) object magnification errors
When optical lens is to the image objects of different object distances, magnifying power difference causes the variation of picture point height.
As shown in fig. 7, as c and a ' by image discriminating be overlap when, picture point is apart from actual image plane center error at this time
h’。
Magnification errors:
The center of image differentiates that error takes a pixel a, then when picture point c is overlaps by image discriminating with a ', satisfaction with
Lower formula：
Above formula is substituted into magnification errors formula, is obtained：
When punching, when the distance between two targets are larger,
Therefore, in order to reduce magnification errors δ5, the distance between two targets should be increased as far as possible.
By error analysis above it is found that this method main source of error is in image interpretation error.General image discriminating essence
Degree can reach 1 pixel, and a is detector Pixel size in following formula.
The errors of centration of pitch orientation：
The errors of centration of azimuth direction：
δOrientation=a
Picture point and electric center of reticule parallax error：
δElectric cross=a
Punching precision：
That is, the punching precision of this system and method is about 2 times of picture centre discrimination precision.
In summary it analyzes, the error of punching device and method provided by the invention is mostly derived from picture centre and differentiates mistake
Difference, first object holder AB, the second Metal pylon CD height errors, pseudo- centering error, detector heeling error, magnification errors
Deng after all, punching precision is limited to picture centre parallax error, and punching essence will be greatly improved by improving image discriminating precision
Degree.Center differentiates that error includes：The differentiation of two target object picture point registrations and picture point overlap degree with electric center of reticule
Differentiate.
The punching precision of pixel rank may be implemented in optical lens punching device and method provided by the invention.
Claims (8)
1. a kind of quick punching device of high-precision optical camera lens, it is characterised in that：Including horizontally disposed optics guide rail (1),
One Metal pylon (2), the second Metal pylon (3), optical lens (5), detector (6) and the monitor being connected with detector (6)
(7)；
The first object holder (2) is arranged on optics guide rail (1) by sliding block with the second Metal pylon (3) and is respectively positioned on light
The side of camera lens (5) is learned, the second Metal pylon (3) is located between first object holder (2) and optical lens (5)；Detector (6)
The other side in optical lens (5) is set；
Setting flag A on the first object holder (2), setting flag C on the second Metal pylon (3), marks center and the mark of A
The center of note C is located on same level straight line；Second Metal pylon (3) lower part is hinged with sliding block；
The optical lens (5) is mounted on by combining mobile station (4) on optics guide rail (1), can three-dimensional mobile and rotation；
The detector (6) is mounted on by mobile device on optical lens (5), can be along the optical axis side of vertical optical camera lens (5)
It is translated to relative to optical lens (5).
2. the quick punching device of high-precision optical camera lens according to claim 1, it is characterised in that：
The monitor (7) is display area self-generating electricity crosshair monitor.
3. the quick punching device of high-precision optical camera lens according to claim 1, it is characterised in that：
The label A and label C is crosshair figure.
4. a kind of quick penetrating method of high-precision optical camera lens, which is characterized in that include the following steps：
1) the quick punching device of high-precision optical camera lens as described in claims 1 to 3 is any is built；Adjust optical lens (5)
Highly, make the height of its optical axis identical as the height of straight line where label A, label C；
2) adjust separately the object distance between first object holder (2), the second Metal pylon (3) and optical lens (5), make label A,
Label C is respectively positioned in the field depth of optical lens (5)；
3) record picture point a, picture point c adjust optical lens (5) and detector (6) in the image planes position of detector as a whole
Its left and right position makes picture point c and picture point a be located on same plumb line in the image that monitor (7) is shown；
4) record picture point a, positions of the picture point c in detector, it is adjusted by optical lens (5) and detector (6) as a whole
Pitch angle and relative to mark A, mark C height, make label A picture point a and label C picture point c monitor (7) show
Image in overlap；
5) it keeps optical lens (5) position constant, along the optical axis direction translation detector (6) of vertical optical camera lens (5), makes wherein
The heart is overlapped with the picture point c of label C.
5. the quick penetrating method of high-precision optical camera lens according to claim 4, it is characterised in that：
Step 2) is as follows：
2.1) object distance between the second Metal pylon of adjustment (3) and optical lens (5), makes label C be located at the scape of optical lens (5)
In deep range；
2.2) the second Metal pylon of rotation (3), the object distance between adjustment first object holder (2) and optical lens (5), makes label
A is located in the field depth of optical lens (5).
6. the quick penetrating method of high-precision optical camera lens according to claim 5, it is characterised in that：
Step 3) is as follows：
3.1) then recording mark C rotates the second Metal pylon (3), record mark in the positions picture point c of detector (6) image planes
Remember A in the positions picture point a of detector (6) image planes；
3.2) it by optical lens (5) and detector (6) integral left right translation, while adjusting its optical axis and being allowed to and label A, label C
Line coincident；
3.3) step 3.1) and step 3.2) are repeated, until picture point c and picture point a is located at the same plumb line of monitor image planes
On.
7. the quick penetrating method of high-precision optical camera lens according to claim 6, it is characterised in that：
Step 4) is as follows：
4.1) then recording mark C rotates the second Metal pylon (3), record mark in the positions picture point c of detector (6) image planes
Remember A in the positions picture point a of detector (6) image planes；
4.2) by optical lens (5) and detector (6) adjust as a whole its pitch angle and relative to mark A, mark C height
Degree；
4.3) step 4.1) and step 4.2) are repeated, until the picture point c of the picture point a of label A and label C weights in monitor image planes
It closes.
8. the quick penetrating method of high-precision optical camera lens according to claim 4, it is characterised in that：
After step 5), in optical lens field depth, mobile first object holder (2) and the second target, to increase by first
The distance between Metal pylon (2) and the second target repeat step 1) to step 5).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489938A (en) * | 2018-11-15 | 2019-03-19 | 中国科学院光电技术研究所 | Method for detecting optical lens distortion based on auto-collimation imaging method |
| CN110542970A (en) * | 2019-06-23 | 2019-12-06 | 江苏同胜光电科技有限公司 | High-precision optical lens rapid core penetrating device |
| CN110763343A (en) * | 2019-10-30 | 2020-02-07 | 济南和普威视光电技术有限公司 | Refrigeration thermal imager |
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