CN107631801B - TDI detector is in the inclined bearing calibration of optical axis orthogonal direction under a kind of static conditions - Google Patents
TDI detector is in the inclined bearing calibration of optical axis orthogonal direction under a kind of static conditions Download PDFInfo
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- CN107631801B CN107631801B CN201710779395.3A CN201710779395A CN107631801B CN 107631801 B CN107631801 B CN 107631801B CN 201710779395 A CN201710779395 A CN 201710779395A CN 107631801 B CN107631801 B CN 107631801B
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Abstract
The invention belongs to electro-optical system integration techno logy fields, and in particular to Airborne IR multispectral scanner TDI detector is in the inclined bearing calibration of optical axis orthogonal direction under a kind of static conditions.In this method, optical system and detector mechanical interface use shaft hole matching, under the premise of guaranteeing in optical axis and detector pair, pass through double spherical structure micro-adjusting mechanisms, point-by-point quantitative measurment is carried out in the inclination of system optical axis orthogonal direction to TDI detector, according to the quantitative relationship between amount trimmed and image grayscale, corrected by optimization and quantification that interpolation processing realizes TDI detector optical axis orthogonal oblique in TDI camera.
Description
Technical field
The invention belongs to electro-optical system integration techno logy fields, and in particular to Airborne IR is multispectral under a kind of static conditions sweeps
Instrument TDI detector is retouched in the inclined bearing calibration of optical axis orthogonal direction.
Background technique
For photo electric imaging system in adjustment, detector photosurface and optical system focal plane need to carry out accurate adjustment, focal plane
Adjustment is most important process in accurate adjustment, this process includes that detector is orthogonal in the adjustment of optical axis direction focal plane and optical axis
(referred to as hang down axis) direction tilts adjustment, guarantees that detector photosurface is overlapped with optical system focal plane.It is usually orthogonal for convenience of optical axis
Tilt adjustment, optical system and detector mechanical interface cooperation it is more loose, between mechanical interface placement different-thickness gasket into
The orthogonal tilt adjustment of row optical axis, but mechanical interface cooperation loosely will lead to optical axis and the poor, poor repeatability of detector accuracy of alignment etc.
Problem.
Airborne infrared multispectral scanner is made of sweep mechanism and camera two parts, which is swept using complete machine
Retouch image forming job mode.Camera adjustment in the quiescent state, is limited by existing test condition, TDI camera itself and test macro without
Method realizes the relative motion of the two, and therefore, common TDI precision focal plane Method of Adjustment is no longer applicable in, and needs to propose a kind of static state
Under the conditions of Airborne IR multispectral scanner TDI detector in the inclined bearing calibration of optical axis orthogonal direction.
Summary of the invention
(1) technical problems to be solved
The present invention proposes that TDI detector is in the inclined bearing calibration of optical axis orthogonal direction under a kind of static conditions, to solve
The technical issues of how accurate adjustment being carried out to TDI detector.
(2) technical solution
In order to solve the above-mentioned technical problem, the present invention proposes that TDI detector is in optical axis orthogonal direction under a kind of static conditions
Inclined bearing calibration, this method comprises the following steps:
S1, the optical system of TDI camera is aligned with the optical path of photoelectric test system；
S2, TDI detector is mounted in tilt micro-adjusting mechanism, and tilt micro-adjusting mechanism is connected to connecing for optical system
On mouth, the alignment of TDI detector and optical system is kept；
S3, in a static condition makes TDI camera work in TDI operating mode, acquires circular hole targets in photoelectric test system
Target image；
S4, between the interface and tilt micro-adjusting mechanism of optical system, gradually increase standard clearance gauge；Standard of every increase
Clearance gauge, TDI camera acquire a target image；
S5, all acquisitions of statistics target image gray scale, fitting clearance gauge thickness and image grayscale curve, to matched curve
Function carries out interpolation processing, finds out TDI detector and is in clearance gauge overall thickness corresponding to optimal focal plane；
S6, the interface, clearance gauge and tilt micro-adjusting mechanism of optical system are fixed, complete TDI detector in optical system
The focal plane adjustment of system optical axis direction；
S7,0.7 times of field positions that circular hole hole target is moved to TDI detector lines column direction visual field, acquire circular hole targets
Target image；
S8, tilt micro-adjusting mechanism is adjusted, rotates TDI detector and run-off the straight around center；Every adjusting is once inclined
Oblique micro-adjusting mechanism, TDI camera acquire a target image；
The gray scale of the target image of all acquisitions in S9, statistic procedure S8, fitting tilt micro-adjusting amount and image grayscale curve,
Interpolation processing is carried out to matched curve function, finds out the regulated quantity of tilt micro-adjusting mechanism；
S10, tilt micro-adjusting mechanism is fixed, completes TDI detector in the inclination of system optical axis orthogonal direction
Correction.
Further, according to the instantaneous field of view angle of TDI camera, choosing then covers the circular hole targets of all TDI series.
Further, in step s 4, according to the depth of focus of optical system, according to half focal depth precision, gradually in light
Increase standard clearance gauge between the interface and tilt micro-adjusting mechanism of system.
Further, in step s 6, multiple standard clearance gauges are changed to a thickness of the special washer of clearance gauge overall thickness, it will
Interface, special washer and the tilt micro-adjusting mechanism of optical system are fixed.
Further, in step s 8, degree of regulation is half depth of focus.
Further, in step slo, dispensing curing process is carried out to tilt micro-adjusting mechanism.(3) beneficial effect
TDI detector hangs down the inclined bearing calibration of axis direction in optical system under static conditions proposed by the present invention, optics
System and detector mechanical interface use shaft hole matching, under the premise of guaranteeing in optical axis and detector pair, pass through double spherical surface knots
Structure micro-adjusting mechanism carries out point-by-point quantitative measurment in the inclination of system optical axis orthogonal direction to TDI detector, according to amount trimmed with
Quantitative relationship between image grayscale realizes the optimization of TDI detector optical axis orthogonal oblique in TDI camera by interpolation processing
It is corrected with quantification.
Detailed description of the invention
Fig. 1 is bearing calibration of embodiment of the present invention schematic diagram.
Specific embodiment
To keep the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to tool of the invention
Body embodiment is described in further detail.
The present embodiment propose under a kind of static conditions TDI detector in the inclined bearing calibration of optical axis orthogonal direction, it is former
Reason is as shown in Figure 1.This method comprises the following steps:
S1, the optical system of TDI camera is aligned with the optical path of photoelectric test system.
S2, TDI detector is mounted in tilt micro-adjusting mechanism, and tilt micro-adjusting mechanism is connected to connecing for optical system
On mouth, the alignment of TDI detector and optical system is kept.
S3, in a static condition makes TDI camera work in TDI operating mode, acquires circular hole targets in photoelectric test system
Target image.Wherein, according to the instantaneous field of view angle of TDI camera, choosing then covers the circular hole targets of all TDI series.
S4, the depth of focus according to optical system, according to half focal depth precision, gradually in the interface of optical system and inclination
Increase standard clearance gauge between micro-adjusting mechanism；Standard clearance gauge of every increase, TDI camera acquire a target image.
S5, all acquisitions of statistics target image gray scale, fitting clearance gauge thickness and image grayscale curve, to matched curve
Function carries out interpolation processing, finds out TDI detector and is in clearance gauge overall thickness corresponding to optimal focal plane；
S6, multiple standard clearance gauges will be changed to a thickness of the special washer of clearance gauge overall thickness, by the interface of optical system,
Special washer and tilt micro-adjusting mechanism are fixed, and complete TDI detector in the focal plane adjustment in system optical axis direction.
S7,0.7 times of field positions that circular hole hole target is moved to TDI detector lines column direction visual field, acquire circular hole targets
Target image；
S8, tilt micro-adjusting mechanism is adjusted, degree of regulation is half depth of focus, rotates TDI detector around center
And run-off the straight；Tilt micro-adjusting mechanism of every adjusting, TDI camera acquire a target image；
The gray scale of the target image of all acquisitions in S9, statistic procedure S8, fitting tilt micro-adjusting amount and image grayscale curve,
Interpolation processing is carried out to matched curve function, finds out the regulated quantity of tilt micro-adjusting mechanism；
S10, dispensing curing process is carried out to tilt micro-adjusting mechanism, completes TDI detector in the orthogonal side of system optical axis
To slant correction.
Using the inclined bearing calibration of optical axis orthogonal direction in TDI detector of the invention, first by TDI detector center
It is adjusted to optical system optimal focal plane position, then by dedicated tilt micro-adjusting mechanism, revolves TDI detector around center
Turn, the target image for acquiring corresponding position after rotation every time establishes rotation position by handling the target image of acquisition
With image grayscale curved line relation, the best regulated quantity of tilt micro-adjusting mechanism can be acquired by interpolation processing, realize that optical system is burnt
Face and the precision adjustment of TDI detector.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. TDI detector is in the inclined bearing calibration of optical axis orthogonal direction under a kind of static conditions, which is characterized in that the method
Include the following steps:
S1, the optical system of TDI camera is aligned with the optical path of photoelectric test system；
S2, TDI detector is mounted in tilt micro-adjusting mechanism, and the tilt micro-adjusting mechanism is connected to the optical system
Interface on, keep the alignment of the TDI detector and the optical system；
S3, in a static condition, makes the TDI camera work in TDI operating mode, acquires circular hole in the photoelectric test system
The target image of target；
S4, between the interface and the tilt micro-adjusting mechanism of the optical system, gradually increase standard clearance gauge；It is every to increase once
Standard clearance gauge, the TDI camera acquire a target image；
S5, all acquisitions of statistics target image gray scale, fitting clearance gauge thickness and image grayscale curve, to matched curve function
Interpolation processing is carried out, the TDI detector is found out and is in clearance gauge overall thickness corresponding to optimal focal plane；
S6, the interface of the optical system, the clearance gauge and the tilt micro-adjusting mechanism are fixed, complete the TDI and visits
Device is surveyed in the focal plane adjustment in the system optical axis direction；
S7,0.7 times of field positions that the circular hole targets are moved to the TDI detector lines column direction visual field, acquire the circle
The target image of hole target；
S8, the tilt micro-adjusting mechanism is adjusted, rotates the TDI detector and run-off the straight around center；It is every to adjust one
The secondary tilt micro-adjusting mechanism, the TDI camera acquire a target image；
The gray scale of the target image of all acquisitions in S9, statistic procedure S8, fitting tilt micro-adjusting amount and image grayscale curve, to quasi-
It closes curvilinear function and carries out interpolation processing, find out the tilt micro-adjusting amount of the tilt micro-adjusting mechanism；
S10, the tilt micro-adjusting mechanism is fixed, completes the TDI detector in the orthogonal side of the system optical axis
To slant correction.
2. bearing calibration as described in claim 1, which is characterized in that according to the instantaneous field of view angle of the TDI camera, selection is covered
Cover the circular hole targets of all TDI series.
3. bearing calibration as described in claim 1, which is characterized in that in step s 4, according to the depth of focus of the optical system,
According to half focal depth precision, gradually increase standard plug between the interface of the optical system and the tilt micro-adjusting mechanism
Ruler.
4. bearing calibration as described in claim 1, which is characterized in that in step s 6, multiple standard clearance gauges are changed to thickness
Degree is the special washer of clearance gauge overall thickness, by the interface of the optical system, the special washer and the tilt micro-adjusting mechanism
It is fixed.
5. bearing calibration as described in claim 1, which is characterized in that in step s 8, degree of regulation is half depth of focus.
6. bearing calibration as described in claim 1, which is characterized in that in step slo, carried out to the tilt micro-adjusting mechanism
Dispensing curing process.
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| JP3189796B2 (en) * | 1991-05-27 | 2001-07-16 | 株式会社日立製作所 | Defect inspection method and device |
| CN100387948C (en) * | 2005-12-23 | 2008-05-14 | 张颖 | Multipurpose calibrator for infrared journal temperature detector |
| JP4776473B2 (en) * | 2006-08-25 | 2011-09-21 | 株式会社ミツトヨ | Optical axis deflection laser interferometer, its calibration method, correction method, and measurement method |
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| CN104050356B (en) * | 2014-04-08 | 2017-03-15 | 北京空间机电研究所 | A kind of TDI Infrared Detectorss scanning imaging system sweep speed appraisal procedure |
| CN104483099B (en) * | 2014-12-19 | 2017-07-25 | 中国科学院长春光学精密机械与物理研究所 | A kind of detection method of large visual field optical system image planes uniformity |
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