CN107121200A - A kind of distributed cold stop structure of super long alignment splicing detector - Google Patents
A kind of distributed cold stop structure of super long alignment splicing detector Download PDFInfo
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- CN107121200A CN107121200A CN201710563664.2A CN201710563664A CN107121200A CN 107121200 A CN107121200 A CN 107121200A CN 201710563664 A CN201710563664 A CN 201710563664A CN 107121200 A CN107121200 A CN 107121200A
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- 230000005855 radiation Effects 0.000 abstract description 15
- 230000000007 visual effect Effects 0.000 description 8
- 230000004438 eyesight Effects 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 7
- 239000007787 solid Substances 0.000 description 6
- 238000003331 infrared imaging Methods 0.000 description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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Abstract
The invention discloses a kind of distributed cold stop structure of super long alignment splicing detector, including discrete thang-kng window, discrete cold stop, discrete optical filter box, super long alignment splicing detector component and cold platform.Discrete thang-kng window is arranged on by soldering in the groove of cold platform outer cover.Discrete cold stop is screwed on discrete optical filter box.Discrete optical filter box is arranged on screw on the cold drawing of cold platform.Super long alignment splicing detector component is cementing to be fixed on the cold drawing of cold platform.Splicing detector in super long alignment splicing detector component is arranged in isosceles triangle, and each splicing detector has the discrete thang-kng window of one group of identical, discrete cold stop and discrete optical filter box.Imaging beam passes sequentially through discrete thang-kng window, discrete cold stop and discrete optical filter box, reaches super long alignment splicing detector component.The present invention can significantly suppress background radiation, improve focal plane irradiance uniformity, moreover it is possible to be fitted image deformation, improve image quality.
Description
Technical field
It is used for the super long alignment splicing detector of infrared optics remote sensing instrument or infrared imaging instrument the present invention relates to a kind of
Distributed cold stop structure, the cold stop structure is mainly used in alignment and pushes away the splicing detector for clearing off and learning remote sensing instrument, is used to
Increase pushes away the observation scope for clearing off and learning remote sensing instrument, while suppressing background radiation, is homogenized image planes irradiation level, splices for long alignment and visit
Survey device and one good working environment is provided.The distributed cold stop structure of super long alignment splicing detector, which can be fitted, simultaneously regards greatly
The distortion curve of field optical system, compensates the image deformation of a part of large visual field optical system, be conducive to infrared remote sensing instrument and
The high-resolution applications of infrared imaging instrument.
Background technology
With the development of long alignment and planar array detector technology, big visual field optical remote sensing instrument obtains more and more widely closing
Note and application.Especially for the remote sensing of the earth instrument on LEO, it is using the push-scanning image system of long detector array
A kind of good image acquisition mode, big visual field push-scanning image optical remote sensing system can realize the covered ground of broadness.For example
Cook type off-axis reflection optical systems, the angle of visual field can reach 20 ° or bigger, on 500km near-earth circular orbit, it is possible to achieve wide
Spend about 176km covered ground.
Under these conditions, it is assumed that each pixel corresponding ground resolution ratio 10m, then push-scanning image optical remote sensing system needs
At least 17600 effective pixels, could cover above-mentioned width, thus bring long detector array pixel quantity and splicing scale
Deng the raising of requirement.
Push away and swept in remote sensing instrument in conventional big visual field, the staggered long-line array detector of isosceles triangle is most common big
Scale detector way of realization.Super long alignment detector is arranged or facet array detector by short-term, by end to end, is alternately arranged
The isosceles triangle connecting method of row, the interval sampling in whole image planes is equivalent to realize ultra-large long alignment or large area array is visited
Survey device.
The visible-light detector of 17 CCD splicings of Changchun Institute of Optics, Fine Mechanics and Physics, CAS, in
2048 × 1 Long Wave Infrared Probes that Shanghai Institute of Technical Physics of the academy of sciences of state develops, and the Kepler astronomy in the U.S. are defended
Star, the GAIA astronomical satellites in Europe, have all been applied successfully the long detector array of splicing or multimode splicing detector.
Super long alignment splicing detector structure is spliced using short-term row detector module isosceles triangle, is alternately arranged composition overlength
Alignment, the clear aperture then together decided on according to the angle of visual field and imaging beam solid angle sets conventional monoblock type cold stop
Structure, including thang-kng window, cold stop and optical filter box.Such as the 2048 of Shanghai Technical Physics Inst., Chinese Academy of Sciences's development
First Long Wave Infrared Probe.2048 yuan of Long Wave Infrared Probes use the end to end staggered row of MCT detectors of 8 256 × 1
The mode of cloth, be connected to become 2048 × 1 long detector array, then before long detector array set a routine entirety
Formula thang-kng window, cold stop and optical filter, are used as the measure for suppressing background radiation.
Infrared detector is the detector based on heat radiation, and the background radiation from mechanical-optical setup is moved to infrared detector
State scope and detectivity have a significant impact.For VISIBLE LIGHT SYSTEM, splice focal plane component and do not need excessive consideration
The thermal background emission problem of mechanical-optical setup.Such as Changchun Institute of Optics, Fine Mechanics and Physics, CAS proposes 17
The Visible-light CCD focal plane component of splicing, it is only necessary to consider arrangement and its relative position relation of detector, with infrared length
Alignment splicing detector is very different.
In the case of small-scale face battle array or short-term row splicing, super long alignment infrared detector uses conventional monoblock type cold light
Late structure, the three-dimensional angular difference between the splicing detector and peripheral field splicing detector of central vision is not obvious, now
The image planes irradiance uniformity of central vision and peripheral field preferably, and more has into the background radiation energy of detector
Limit.
Super long alignment splicing detector for being operated in middle long wave infrared region, conventional monoblock type cold stop structure pair
The central vision splicing detector and the solid angle of peripheral field splicing detector answered differ greatly, the splicing detection of center
Device is different with the corresponding solid angle of splicing detector pixel of marginal position, and the background radiation energy of reception is also not quite similar, and gives
Focal plane brings additional inhomogeneities.
With the increase of splicing line number of columns, size of the super long alignment splicing detector in alignment length and width direction is poor
Different increase, the conventional corresponding center module of monoblock type cold stop and the three-dimensional angular difference of edge module become big.Due to infrared waves
The influence of section background radiation, under the effect of homogeneous radiation energy, conventional monoblock type cold stop, which can also increase, enters overlength
The inhomogeneities of the background radiation of alignment splicing detector, limits dynamic range and the sensitivity of infrared system.
The ground resolution and breadth of infrared remote sensing instrument are required to improve constantly so that the detector of infrared remote sensing instrument is spelled
Connect that scale is increasing, the central vision and peripheral field splicing detector irradiation level that conventional monoblock type cold stop is present are uneven
Even property, and the problems such as background radiation increase it is increasingly severe, these all influence the performance of super long alignment splicing detector.
To realize large-scale super long alignment splicing detector, the module number of short-term row detector splicing is more and more,
Detector array length is increasingly longer, and conventional monoblock type cold stop structure, which does not adapt to such growth trend and application, to be needed
Ask.
The content of the invention
Present invention incorporates the advantage of ripe super long alignment splicing detector, spelled according to infrared imaging instrument super long alignment
Connect the design feature and application background of detector, it is proposed that a kind of distributed cold stop structure of super long alignment splicing detector.
Splicing detector in super long alignment splicing detector component is alternately arranged in isosceles triangle, if it is possible to for each spelling
Connect detector and add independent thang-kng window, cold stop and optical filter, build independent optical interface, make super long alignment splicing spy
Surveying each splicing detector of device can only be come from by independent, exclusive optical filter box, cold stop and thang-kng window reception
The emittance of optical system, the background spoke that the splicing detector of such central vision and peripheral field is received from discrete cold stop
Penetrate solid angle to greatly reduce, can significantly suppress background radiation, while the solid angle of each splicing detector is more closely, improve
The uniformity of image planes irradiation level.
Above-mentioned principle refers to optical interface and the aperture of the distributed cold stop structure of the super long alignment splicing detector of accompanying drawing 3
The optical interface and angular aperture model schematic of angle model and the conventional monoblock type cold stop of accompanying drawing 4.
The distributed cold stop structure of super long alignment splicing detector involved in the present invention is as shown in Figure 1.Super long alignment
Splicing detector distribution cold stop structure includes discrete thang-kng window, discrete cold stop, discrete optical filter box and ultra-long
Row splicing detector component.
Described discrete thang-kng window 1 is arranged on by soldering in cold platform outer cover 5-2 groove；Discrete cold stop 2 leads to
Screw is crossed to be fixed on discrete optical filter box 3；Discrete optical filter box 3 is arranged on the cold drawing 5-3 of cold platform 5 by screw
On；Super long alignment splicing detector component is fixed on the cold drawing 5-3 of cold platform 5 by cementing；
Splicing detector in super long alignment splicing detector component 4 is alternately arranged in isosceles triangle, each splicing detector
There are the discrete thang-kng window 1 of one group of identical, discrete cold stop 2 and discrete optical filter box 3；
Imaging beam passes sequentially through discrete thang-kng window 1, discrete cold stop 2 and discrete optical filter box 3, reaches ultra-long
Splicing detector in row splicing detector component 4.
It is an advantage of the invention that：
1. structure and assembling are simple, discrete cold stop and discrete optical filter box can be assembled from into module with complete independently,
It is advantageously ensured that the assembly precision of super long alignment splicing detector；
2. background radiation inhibition is good, discrete cold stop and discrete optical filter box can match super long alignment splicing spy
The imaging beam angular aperture of each splicing detector of device assembly is surveyed, the reception of super long alignment splicing detector component can be effectively reduced
The solid angle of background radiation, so as to limit the background radiation energy into super long alignment splicing detector component；
3. reducing super long alignment splicing detector component central vision and the corresponding three-dimensional angular difference of peripheral field, reduce
The irradiation level fluctuation of super long alignment splicing detector component each splicing detector, improves focal plane irradiance uniformity, has
Beneficial to the dynamic range and detectivity for improving imaging system.
4. super long alignment splicing detector distribution cold stop structure is easy to be fitted the image deformation of large visual field optical system,
Compensation and the image deformation of correction large visual field optical system, are conducive to the high-resolution of infrared remote sensing instrument and infrared imaging instrument
Using.
Brief description of the drawings
Fig. 1 is the distributed cold stop structure top view of super long alignment splicing detector, and Fig. 1 shows super long alignment splicing spy
Survey the discrete thang-kng window of the distributed cold stop structure isosceles triangle arrangement of device.In Fig. 1,1 is discrete thang-kng window, and 2 be discrete
Cold stop, 3 be discrete optical filter box (wherein 3-1 is discrete optical filter, and 3-2 is optical filter retainer), and 4 be that super long alignment is spelled
Detector assembly is connect, 5 be cold platform.
Fig. 2 is the sectional view in the distributed online column width direction of cold stop structure of super long alignment splicing detector.
Fig. 3 is sectional view of the conventional monoblock type cold stop structure in alignment length direction.In figure 3, I-1 is thang-kng window
Mouthful, I-2 is cold stop, and I-3 is optical filter box (wherein I-3-1 is discrete optical filter, and I-3-2 is optical filter retainer), I-4
It is super long alignment splicing detector component, I-5 is cold platform.
Fig. 4 is the sectional view in the conventional online column width direction of monoblock type cold stop structure.
Fig. 5 is the optical interface and angular aperture model schematic of the distributed cold stop structure of super long alignment splicing detector,
Figure (a) is the optical interface and aperture angle model of alignment width, and figure (b) is optical interface and the aperture of alignment length direction
Angle model.
Fig. 6 is the optical interface and angular aperture model schematic of conventional monoblock type cold stop structure, and figure (a) is that alignment is wide
The optical interface and aperture angle model in direction are spent, figure (b) is the optical interface and aperture angle model of alignment length direction.
Embodiment
It is described in detail below in conjunction with the accompanying drawings, so as to which the architectural feature and functional characteristics of the present invention can be better described,
Rather than limit protection scope of the present invention.
Fig. 1 and Fig. 2 identify the present invention in detail --- the composition of super long alignment splicing detector distribution cold stop structure,
Including discrete thang-kng window, discrete cold stop, discrete optical filter box and super long alignment splicing detector component and cold platform.
Fig. 3 and Fig. 4 are conventional monoblock type cold stop structural representations, and Fig. 5 is the distribution of Fig. 1 super long alignments splicing detector
The optical interface and angular aperture model schematic of formula cold stop structure, Fig. 6 are the conventional monoblock type cold stop structures of Fig. 3 and Fig. 4
Optical interface and angular aperture model schematic.
Fig. 1, Fig. 2 and Fig. 3, Fig. 4 have identical optical design parameters, and Fig. 5 angular aperture is less than Fig. 6 angular aperture,
And the aperture angular difference of Fig. 5 central visions and peripheral field splicing detector reduces.
The size and thickness parameter of discrete thang-kng window 1, the principle of selection are mainly determined according to the result of optical design
Effective clear aperture of discrete thang-kng window, thickness parameter is designed according to the size of cold platform outer cover 5-2 grooves.
The size and thickness parameter of discrete cold stop 2, the main principle of selection are to be determined to divide according to the result of optical design
The clear aperture of vertical cold stop, thereby determines that bore size and the position of discrete cold stop.The thickness of discrete cold stop can refer to
The design principle of thin-wall construction is chosen.
The size and thickness parameter of discrete optical filter box 3, the main principle of selection are true according to the result of optical design
The clear aperture of fixed discrete optical filter box, thereby determines that discrete optical filter 3-1 size.The thickness ginseng of discrete optical filter box
Thickness design principle according to general optical element is chosen.
The location parameter of super long alignment splicing detector component 4, the main principle of selection is the result according to optical design
Determine the arrangement of each splicing detector in super long alignment splicing detector component.
Cold platform 5 is that super long alignment splicing detector component 4 provides vacuum and low-temperature working environment, while being also discrete logical
Light window 1, discrete cold stop 2, the fixed and positioned benchmark of discrete optical filter box 3 and super long alignment splicing detector component 4.
The assembling of super long alignment splicing detector distribution cold stop structure can be completed by modular assembly and detection.
Discrete thang-kng window 1, discrete cold stop 2, discrete optical filter box 3 and super long alignment splicing detector component 4 are in technique
It is relatively independent, it can assemble and detect with complete parallel.Avoid the string that the conventional monoblock type cold stop design method of accompanying drawing 2 is present
The situation that luggage is matched somebody with somebody and precision is interfered occurs.
Claims (1)
1. a kind of distributed cold stop structure of super long alignment splicing detector, including discrete thang-kng window (1), discrete cold stop
(2), discrete optical filter box (3), super long alignment splicing detector component (4) and cold platform (5), it is characterised in that：
Described discrete thang-kng window (1) is arranged on by soldering in the groove of cold platform outer cover (5-2)；Discrete cold stop (2)
It is fixed by screws on discrete optical filter box (3)；Discrete optical filter box (3) is arranged on cold platform (5) by screw
On cold drawing (5-3)；Super long alignment splicing detector component is fixed on the cold drawing of cold platform (5) (5-3) by cementing；
Splicing detector in super long alignment splicing detector component (4) is alternately arranged in isosceles triangle, each splicing detector
There are the discrete thang-kng window (1) of one group of identical, discrete cold stop (2) and discrete optical filter box (3)；
Imaging beam passes sequentially through discrete thang-kng window (1), discrete cold stop (2) and discrete optical filter box (3), reaches overlength
Splicing detector in alignment splicing detector component (4).
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| CN201710563664.2A CN107121200A (en) | 2017-07-12 | 2017-07-12 | A kind of distributed cold stop structure of super long alignment splicing detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107576681A (en) * | 2017-09-11 | 2018-01-12 | 江苏天瑞仪器股份有限公司 | It is a kind of to be used for the light-blocking member with more collimator devices |
| CN111710749A (en) * | 2020-04-23 | 2020-09-25 | 中国科学院上海技术物理研究所 | Long-line detector splicing structure based on multi-substrate secondary splicing and implementation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1542467A (en) * | 2003-11-04 | 2004-11-03 | 中国科学院上海技术物理研究所 | Discrete light filter structure of ultralong lines range infrared focal plane detector |
| CN1858906A (en) * | 2006-05-26 | 2006-11-08 | 中国科学院上海技术物理研究所 | Super long alignment infrared focus plane detector |
| CN106370310A (en) * | 2016-10-13 | 2017-02-01 | 中国科学院上海技术物理研究所 | Linear detector packaging structure capable of suppressing stray light and evening light flux and realization method |
-
2017
- 2017-07-12 CN CN201710563664.2A patent/CN107121200A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1542467A (en) * | 2003-11-04 | 2004-11-03 | 中国科学院上海技术物理研究所 | Discrete light filter structure of ultralong lines range infrared focal plane detector |
| CN1858906A (en) * | 2006-05-26 | 2006-11-08 | 中国科学院上海技术物理研究所 | Super long alignment infrared focus plane detector |
| CN106370310A (en) * | 2016-10-13 | 2017-02-01 | 中国科学院上海技术物理研究所 | Linear detector packaging structure capable of suppressing stray light and evening light flux and realization method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107576681A (en) * | 2017-09-11 | 2018-01-12 | 江苏天瑞仪器股份有限公司 | It is a kind of to be used for the light-blocking member with more collimator devices |
| CN111710749A (en) * | 2020-04-23 | 2020-09-25 | 中国科学院上海技术物理研究所 | Long-line detector splicing structure based on multi-substrate secondary splicing and implementation method |
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