CN103399416B - High-precision combined adjusting and butting method and mechanism for infrared imaging system - Google Patents
High-precision combined adjusting and butting method and mechanism for infrared imaging system Download PDFInfo
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- CN103399416B CN103399416B CN201310283064.2A CN201310283064A CN103399416B CN 103399416 B CN103399416 B CN 103399416B CN 201310283064 A CN201310283064 A CN 201310283064A CN 103399416 B CN103399416 B CN 103399416B
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- 238000003331 infrared imaging Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title abstract description 11
- 230000003287 optical effect Effects 0.000 claims abstract description 58
- 238000003384 imaging method Methods 0.000 claims abstract description 31
- 238000012634 optical imaging Methods 0.000 claims abstract description 24
- 238000003032 molecular docking Methods 0.000 claims description 44
- 239000011521 glass Substances 0.000 claims description 15
- 238000004364 calculation method Methods 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 abstract 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 101100117236 Drosophila melanogaster speck gene Proteins 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 230000033083 heart process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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Abstract
The invention provides a method and a mechanism for realizing combined adjustment and butt joint of an infrared imaging system and an imaging focal plane, which mainly solve the problems that the verticality precision of an optical axis of an optical imaging system and an imaging focal plane, the contact ratio precision of the optical axis of the optical imaging system and a central normal line of a target surface of the imaging focal plane and the contact ratio precision of the image surface of the optical imaging system and the imaging focal plane cannot be ensured in the conventional image surface butt joint process. The invention simultaneously realizes the turning processing of the butt joint reference surface of the focal plane assembly and the end surface of the mounting flange of the optical lens after reaching the set adjustment target and the adjustment precision through one-time clamping of the high-precision double-shaft lathe so as to ensure the parallelism of the two planes and fully eliminate the assembly error caused by the previous assembly link of the focal plane assembly and the optical lens.
Description
Technical field
The present invention relates to a kind of infrared imaging system high accuracy combination adjustment, docking calculation and mechanism,
Dock with focal plane high accuracy combination adjustment for realizing infrared imaging system.
Background technology
The infrared imaging device that infrared optical imaging system and infrared focus plane form is Aeronautics and Astronautics, faces
The important load of the field aircraft such as near space, provides video image, this type of long-focus light for each generic task
System is in its system optical axis and the perpendicularity of imaging focal plane, optical axis and imaging focal plane target surface
The registration of heart normal, optical system image planes and the registration of imaging focal plane require the highest, how to exist
Ensure during infrared imaging device assembling that These parameters requires to become decision infrared imaging device image quality
Important step with certainty of measurement.
Traditional optical imaging system dock with focal plane be by repeatedly repair cut optical lens mounting flange with
Spacer thickness between the structural member of fixing focal plane component completes optical system and puts down with imageing sensor Jiao
The docking in face.The method cannot accurately control system optical axis and the perpendicularity of imaging focal plane and optical axis
With the registration of imaging focal plane target surface centre normal, after causing optical system imaging, image definition is the most right
Title, picture centre are asymmetric, and cause many uncertain factors affecting certainty of measurement.
Summary of the invention
The present invention provide one realize infrared imaging system and imaging focal plane combination adjustment, docking calculation and
Mechanism, mainly solves in existing image planes docking operation and cannot ensure optical imaging system optical axis and imaging
The perpendicularity precision of focal plane, optical imaging system optical axis overlap with imaging focal plane target surface centre normal
Spend the registration precision problem of precision and optical imaging system image planes and imaging focal plane.
The concrete technical solution of the present invention is as follows:
This infrared imaging system focal plane combination adjustment, docking mechanism include what high-precision dual-axis lathe formed
Two-axis table, two rotary shafts of two-axis table inner all with can realize four-degree-of-freedom adjustment to heart adjustment
Device side connects；Said two rotary shaft is left-handed rotating shaft and dextral shaft；Wherein near left-handed rotating shaft
Side, outer end is disposed with source, face black matrix, parallel light tube and interior focusing centering instrument along light path outbound course,
What left axle rotated is provided with optical lens in heart adjusting apparatus；Described parallel light tube optical axis rotates with lathe
Axis is parallel；Described dextral shaft heart adjusting apparatus has been set up by infrared Jiao along light path recipient
Plane and the infrared imaging construction unit of docking datum level composition, described focal plane and docking datum level are mutual
Parallel, focal plane is vertical with lathe rotary shaft.
Above-mentioned focal plane is arranged in focal plane protection glass；Described focal plane protection glass is arranged on docking
On datum level, and it is coated with focal plane..
Above-mentioned focal plane protection glass is provided with reflectance coating towards optical lens side.
This infrared imaging system and focal plane combination adjustment docking calculation comprise the following steps:
1] adjust focal plane, make focal plane vertical with lathe rotary shaft, adjust (turning) docking base the most again
Quasi-face, makes docking datum level vertical with lathe rotary shaft；
2] along optical lens thing side incident parallel light, directional light is parallel with lathe rotation, and directional light is through light
At camera lens image planes, an image patch is formed after learning lens imaging；Adjust in left-handed rotating shaft to heart adjusting apparatus,
Make to rotate during left-handed rotating shaft the image patch holding position at camera lens image planes motionless；
3] moved axially by left-handed rotating shaft and dextral shaft that can to realize optical imaging system image planes and imaging burnt
The coincidence of plane；
4] adjust the dextral shaft translational degree of freedom to heart adjusting apparatus, make optical imaging system optical axis and imaging
Focal plane target surface centre normal overlaps；
5] distance by measuring camera lens mounting flange end face and docking datum level is repaiied and is cut spacer thickness, it is achieved
Image planes high accuracy docking.
Above-mentioned steps 1 is specifically:
Rotate dextral shaft, make focal plane protection glass surface and lathe with interior focusing centering instrument for judgment basis
Rotary shaft is vertical, if docking datum level occurs with lathe rotary shaft after having adjusted, adjusts docking base
Quasi-face makes it vertical with lathe rotary shaft.
Camera lens is caused to pacify if above-mentioned steps 2 adjusts during the optical axis of optical lens overlaps with lathe rotary shaft
Dress end face of flange normal and the inclination of lathe rotary shaft, adjust camera lens mounting flange end face and lathe rotary shaft
Vertically.
Above-mentioned steps 1 adjusts docking datum level, step 2 adjusts camera lens mounting flange end face and all passes through
The mode of turnery processing is adjusted.
It is an advantage of the current invention that:
The present invention is by high-precision dual-axis lathe clamped one time (secondary clamping repetitive positioning accuracy is poor) simultaneously
Achieve docking datum level and the optics of focal plane assembly after the adjustment target and Adjustment precision reaching set
The turnery processing of camera lens mounting flange end face, to ensure the depth of parallelism of two planes, substantially eliminates burnt flat
The rigging error that face assembly and two parts of optical lens cause in early stage assembling link；
It is simultaneously achieved optical imaging system optical axis by high-precision dual-axis lathe clamped one time and combination adjustment
Weight with perpendicularity, optical imaging system optical axis and the imaging focal plane target surface centre normal of imaging focal plane
The registration of right, optical imaging system image planes and imaging focal plane adjusts the content of three aspects.
Accompanying drawing explanation
Fig. 1 is that optical system focal plane combines adjustment docking system figure；
Fig. 2 is that focal plane component docking datum level adjusts schematic diagram with the focal plane protection glass surface depth of parallelism；
Fig. 3 optical lens optical axis adjusts schematic diagram with lathe rotary shaft registration；
Accompanying drawing is detailed as follows:
1-double-axle lathe；The right axle of 11-lathe；The left axle of 12-lathe；2-is to heart adjusting apparatus；3-camera lens is installed
End face of flange；4-optical lens；5-focal plane protection glass；6-interior focusing centering instrument；7-parallel light tube.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail:
This invention system consists of uses that a high-precision dual-axis is horizontal or dual spindle vertical lathe is as platform, as
Shown in Fig. 1, two rotary shaft is each fixes one and can realize optics that four-degree-of-freedom adjusts to heart adjusting apparatus,
The heart is adjusted by the optics that optical lens is fixed near source, face black matrix, infrared collimator and interior focusing centering instrument
In engagement positions, optical lens object plane is towards parallel light tube and interior focusing centering instrument；Focal plane component is fixed on
Another optics is in heart adjusting apparatus, and its focal plane is towards parallel light tube and interior focusing centering instrument direction.
The method of this invention specifically includes following steps:
1. the docking datum level of focal plane component adjusts with the focal plane protection glass surface depth of parallelism
As in figure 2 it is shown, protect glass to be considered as plate glass focal plane, coating reflecting material increases if desired
Add intensity of reflected light, rotating during main shaft, by adjusting optics to heart adjusting apparatus, within adjust
Burnt centering instrument is that judgment basis makes focal plane protection glass surface vertical with lathe rotary shaft, so docks base
With lathe rotary shaft, quasi-face may occur that (this inclination is due to the system of focal plane chip self in certain inclination
Make the rigging error between error and focal plane chip and circuit board, and the structural member of fixing focal plane chip
Cause), this tilt phenomenon eliminates by turnery processing docking datum level and (docks datum level in turning process
See light, show to dock datum level the most vertical with lathe rotary shaft, show that glass is protected in focal plane simultaneously
Face is the most parallel with docking datum level).
Step 1 is in order to eliminate the nonparallelism of docking datum level and focal plane protection glass surface, traditional work
Process can only weld at the structural member of focal plane chip with circuit board with fixing focal plane chip, assemble
During eliminate as far as possible, once weld, assembled after cannot eliminate this parallelism error.
2. optical lens optical axis adjusts with lathe rotary shaft registration
As it is shown on figure 3, be made up of source, face black matrix and infrared collimator in optical lens thing side erection one
Special equipment, adjusts equipment supporter so that the directional light that parallel light tube sends is parallel with lathe rotation,
The directional light that parallel light tube sends forms an image patch (this image patch after optical lens imaging at camera lens image planes
Can be received and displayed on monitor by an auxiliary Infrared Detectors), if the optical axis of this optical lens and car
Bed rotary shaft is misaligned, then during boring-and-turning mill main shaft, the image patch at camera lens image planes can be along with lathe
Main shaft rotates and rocks, and slosh frequency is identical with lathe spindle speed, by adjusting, the heart is adjusted dress
Put so that during boring-and-turning mill main shaft, the image patch holding position at camera lens image planes is motionless, then show
The optical axis of optical lens overlaps with lathe rotary shaft.
Camera lens will certainly be caused to pacify during the optical axis of above-mentioned adjustment optical lens overlaps with lathe rotary shaft
(this inclination is i.e. lens optical system optical axis and mirror in the inclination of dress end face of flange normal and lathe rotation main shaft
The manufacturing and positioning errors accumulation of head mounting flange end face), this tilt phenomenon leans on turnery processing camera lens Method for Installation
Blue end face eliminates that (camera lens mounting flange end face is shown in light in turning process, shows camera lens Method for Installation
Blue end face is the most vertical with lathe rotary shaft, shows that system optical axis overlaps with lathe rotary shaft simultaneously).
Step 1 and step 2 achieve the perpendicularity adjustment of optical imaging system optical axis and imaging focal plane.
Traditional process can only carry out car to camera lens mounting flange end face in optical lens is to heart process
Cutting, once optical mirror slip and structural member have assembled optical axis and the camera lens mounting flange end face of rear optical system
The error of perpendicularity (generally centering mismachining tolerance and rigging error) cannot eliminate.
3. optical imaging system image planes adjust with the registration of imaging focal plane
As it is shown in figure 1, λ is the distance between camera lens image planes and imaging focal plane, moved axially by main shaft
Overlapping of optical imaging system image planes and imaging focal plane can be realized.
4. optical imaging system optical axis adjusts with the registration of imaging focal plane target surface centre normal
Can form an electricity crosshair at monitor display centre after being energized to focal plane component, this crosshair is i.e.
For the target surface center of focal plane, realized the weight of optical imaging system image planes and imaging focal plane by step 3
After conjunction, optical imaging system optical axis not necessarily overlaps with imaging focal plane target surface centre normal, if do not weighed
Close, it is found that the directional light that parallel light tube sends is by speck picture and monitor formed by optical imaging system
The electric center of reticule of display centre is misaligned, by adjust the right axle of lathe to the translation of heart adjusting apparatus from
Speck center can be made to overlap with center of reticule by degree (other free degree can not adjust), now speck
Center is not rocked with the rotation of lathe spindle, shows optical imaging system optical axis and imaging focal plane target surface
Centre normal overlaps.
5. optical imaging system docking
Repaiied by the distance measuring camera lens mounting flange end face and docking datum level and cut spacer thickness, it is achieved image planes
High Dock With Precision Position.
Claims (7)
1. an infrared imaging system focal plane combination adjustment, docking mechanism, it is characterised in that: include height
The two-axis table of precision double-axle lathe composition, two rotary shafts of two-axis table inner all with can realize four selfs
By what degree adjusted, heart adjusting apparatus side is connected；Said two rotary shaft is left-handed rotating shaft and dextral shaft；
Wherein it is disposed with source, face black matrix, parallel light tube near side, left-handed rotating shaft outer end along light path outbound course
With interior focusing centering instrument, left-handed rotating shaft be provided with optical lens in heart adjusting apparatus；Described directional light
Pipe optical axis is parallel with lathe rotation；Described dextral shaft heart adjusting apparatus is received direction along light path
On be provided with by infrared focus plane and the docking infrared imaging construction unit that forms of datum level, described focal plane
Being parallel to each other with docking datum level, focal plane is vertical with lathe rotary shaft.
Infrared imaging system focal plane combination adjustment the most according to claim 1, docking mechanism, its
It is characterised by: described focal plane is arranged in focal plane protection glass；Described focal plane protection glass is arranged
On docking datum level, and it is coated with focal plane.
Infrared imaging system focal plane combination adjustment the most according to claim 2, docking mechanism, its
It is characterised by: described focal plane protection glass is provided with reflectance coating towards optical lens side.
4. infrared imaging system focal plane combination adjustment, the adjustment of docking mechanism as claimed in claim 1
Docking calculation, it is characterised in that comprise the following steps:
Step 1] adjust focal plane, make focal plane vertical with lathe rotary shaft, adjust docking benchmark the most again
Face, makes docking datum level vertical with lathe rotary shaft；
Step 2] along optical lens thing side incident parallel light, directional light is parallel with lathe rotation, parallel
Light forms an image patch after optical lens imaging at camera lens image planes；Adjust the heart being adjusted in left-handed rotating shaft
Device so that the image patch holding position at camera lens image planes is motionless during the left-handed rotating shaft of rotation；
Step 3] moved axially with dextral shaft by left-handed rotating shaft and can realize optical imaging system image planes and to become
Coincidence as focal plane；
Step 4] adjust the dextral shaft translational degree of freedom to heart adjusting apparatus, make optical imaging system optical axis
Overlap with imaging focal plane target surface centre normal；
Step 5] repaiied by the distance measuring camera lens mounting flange end face and docking datum level that to cut pad thick
Degree, it is achieved image planes high accuracy docking.
Infrared imaging system the most according to claim 4 and focal plane combination adjustment docking calculation, its
Be characterised by: described step 1 specifically: rotate dextral shaft, with interior focusing centering instrument as judgment basis
Make focal plane protection glass surface vertical with lathe rotary shaft, if docking datum level revolves with lathe after having adjusted
Rotating shaft occurs, and adjusts docking datum level and makes it vertical with lathe rotary shaft.
Infrared imaging system the most according to claim 5 and focal plane combination adjustment docking calculation, its
It is characterised by: cause if described step 2 adjusts during the optical axis of optical lens overlaps with lathe rotary shaft
Camera lens mounting flange normal line of butt end and the inclination of lathe rotary shaft, adjust camera lens mounting flange end face and lathe
Rotary shaft is vertical.
Infrared imaging system the most according to claim 6 and focal plane combination adjustment docking calculation, its
It is characterised by: described step 1 adjusts docking datum level, step 2 adjusts camera lens mounting flange end face
All it is adjusted by the way of turnery processing.
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| CN201310283064.2A CN103399416B (en) | 2013-07-05 | 2013-07-05 | High-precision combined adjusting and butting method and mechanism for infrared imaging system |
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| CN201310283064.2A CN103399416B (en) | 2013-07-05 | 2013-07-05 | High-precision combined adjusting and butting method and mechanism for infrared imaging system |
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| CN103399416B true CN103399416B (en) | 2016-09-07 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706139B (en) * | 2017-02-10 | 2017-12-26 | 西安中科飞图光电科技有限公司 | A kind of high-precision infrared imaging system image planes docking calculation |
| CN107483778A (en) * | 2017-07-13 | 2017-12-15 | 西安应用光学研究所 | Focus the repeatability adjusting process away from ccd video camera object lens image planes Yu CCD photosurfaces |
| CN109120921B (en) * | 2018-09-17 | 2020-02-14 | 北京空间机电研究所 | Focal plane adjusting mechanism of low-temperature vacuum remote sensor |
| CN110488453B (en) * | 2019-07-19 | 2020-10-13 | 中国科学院长春光学精密机械与物理研究所 | Device and method for determining long-focus camera adjustment reference |
| 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 |
| CN111215646B (en) * | 2019-12-09 | 2021-05-25 | 北京海普瑞森超精密技术有限公司 | Horizontal ultra-precise optical lens centering lathe |
| CN113834511A (en) * | 2021-09-24 | 2021-12-24 | 西安北方光电科技防务有限公司 | Adjusting tool and adjusting method for imaging detector |
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| US5631466A (en) * | 1995-06-16 | 1997-05-20 | Hughes Electronics | Apparatus and methods of closed loop calibration of infrared focal plane arrays |
| CN203365815U (en) * | 2013-07-05 | 2013-12-25 | 中国科学院西安光学精密机械研究所 | High-precision combined adjusting and butting mechanism of infrared imaging system |
-
2013
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5631466A (en) * | 1995-06-16 | 1997-05-20 | Hughes Electronics | Apparatus and methods of closed loop calibration of infrared focal plane arrays |
| CN203365815U (en) * | 2013-07-05 | 2013-12-25 | 中国科学院西安光学精密机械研究所 | High-precision combined adjusting and butting mechanism of infrared imaging system |
Non-Patent Citations (2)
| Title |
|---|
| Nonuniformity Correction of Infrared Image Sequences Using the Constant-Statistics Constraint;John G. Harris and Yu-Ming Chiang;《TRANSACTIONS ON IMAGE PROCESSING》;19990831;第8卷(第8期);第1148-1151页 * |
| 应用于校正扩展视场偏差的红外成像测量方法;陈卫宁，杨洪涛，范哲源等;《红外与激光工程》;20130331;第42卷(第3期);第584-589页 * |
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