CN2759942Y - Correcting apparatus for positioning and mounting and 45-degrees scan mirror of space remote sensing instrument - Google Patents
Correcting apparatus for positioning and mounting and 45-degrees scan mirror of space remote sensing instrument Download PDFInfo
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- CN2759942Y CN2759942Y CN 200420110482 CN200420110482U CN2759942Y CN 2759942 Y CN2759942 Y CN 2759942Y CN 200420110482 CN200420110482 CN 200420110482 CN 200420110482 U CN200420110482 U CN 200420110482U CN 2759942 Y CN2759942 Y CN 2759942Y
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- remote sensing
- optical system
- scan mirror
- sensing instrument
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Abstract
The utility model discloses a correcting device for positioning and installation of a 45 DEG scan mirror of a space remote sensing instrument, which comprises three internally focusing telescopes, a right-angle prism assembly and an optical system fixed on an optical platform of the remote sensing instrument. The utility model is characterized in that the first internally focusing telescope is arranged on the lower part of the optical system and is coaxial with an optical axis of the optical system; the right-angle prism assembly is arranged on the upper part of the optical system and in the installation position of the 45 DEG scan mirror; the second internally focusing telescope and the third internally focusing telescope are arranged on the left and the right sides of the right-angle prism assembly, are positioned in the same optical axis and are perpendicular to the optical axis of the optical system. When the utility model is provided with the 45 DEG scan mirror, the right-angle prism assembly is removed to enforce accurate positioning of the 45 DEG scan mirror, thereby, the utility model thoroughly solves the problem that the positioning deflection of the 45 DEG scan mirror affects the image quality of the space remote sensing instrument.
Description
Technical field
The utility model relates to the optical system of space remote sensing instrument, specifically is meant a kind of correct equipment that is used for 45 ° of accurate location and installation of scan mirror.
Technical background
Because 45 ° of scan mirror scanning ranges reach 360 °, scan mirror whenever rotates a circle and can scan ground front space, earth edge to edge scene, cold space and Instrument shell successively.This scan mode to realize radiation calibration on the star, to obtain even premium-quality image very favourable; Simultaneously, 45 ° of scan mirrors can satisfy the restriction of satellite platform to load volume, weight, and stable and reliable for performance.Because 45 ° of scan mirror brought picture rotations are the outer view field imagings of influence axle only, axle is gone up or the space remote sensing instrument of paraxial small field of view earth observation for only carrying out, and can directly use 45 ° of scan mirrors and needn't consider that picture rotates; And for adopting the walk abreast space remote sensing instrument of scanning imagery of planar array detector, because its observation visual field is bigger, scan mirror brought as rotating must to adopt the picture that the disappears technology of revolving to solve 45 °, and present domestic employing K mirror disappears and solved this problem as the technology of revolving.Therefore 45 ° of scan mirrors are able to widespread use in the space remote sensing instrument.
Under the prerequisite that guarantees 45 ° of scan mirror matrix reflecting surface planenesses, by nickel plating polishing or these two kinds of methods of optical reproduction, can both obtain to satisfy the optical surface shape of system's operating needs, the scan mirror minute surface is can the quality of optical imaging of space remote sensing instrument not to be exerted an influence, but the installing and locating precision of scan mirror will influence the final image quality of space remote sensing instrument.Therefore, we must guarantee the installing and locating precision of scan mirror effectively when pursuing the performance of space remote sensing instrument own.
The installing and locating error of 45 ° of scan mirrors can be divided into angular deviation and rotating shaft departs from, these two kinds of deviations all can cause the skew of observed object in the satellite flight direction, cause the not registration between the double scan image, thereby influence our analysis and utilization the space remote sensing image resource.
The setting accuracy of 45 ° of scan mirrors guaranteed by the machine up benchmark in the past, along with being showing improvement or progress day by day of China's space remote sensing instrument development level and improving constantly of technical index, adopt the pixel dwell time of the parallel scanning imagery of multi-element detector more and more, thereby reach the purpose of the signal to noise ratio that improves instrument with the prolongation ground object target.Multi-element detector and line scanning will make the instrument pitch of scanning be multiplied, the installing and locating error of 45 ° of scan mirrors is to the also corresponding increase of the influence of space remote sensing image, so, only can not satisfy the setting accuracy requirement of 45 ° of scan mirrors, must adopt new technology to guarantee the installing and locating precision of 45 ° of scan mirrors by the machine up benchmark.
Summary of the invention
The purpose of this utility model provides a kind of 45 ° of pinpoint correct equipments of scan mirror of space remote sensing instrument that are applicable to, guarantees the accurate location of 45 ° of scan mirrors by the correction of this device.
Correct equipment of the present utility model comprises: three internal focusing telescopes, double prismatic square assemblies, be fixed on the optical system on the remote sensing instrument base plate 8.It is characterized in that: the 1st internal focusing telescope 1 places the below of optical system 6, and coaxial with the optical axis 7 of optical system; Double prismatic square assembly 4 places the top of optical system, i.e. the installation site of 45 ° of scan mirrors 5; The 2nd internal focusing telescope 2 and the 3rd internal focusing telescope 3 place double prismatic square assembly 4 about two limits, and be on the same optical axis, vertical with system optical axis 7.Double prismatic square assembly 4 is moving assemblies, by two double prismatic squares 401,402, and makes its inclined-plane composition staggered relatively.
The utility model has the advantages that:
1. the foundation of this device is very easy, only needs optical correction device commonly used.
2. this Unit Installation precision is determined by the working accuracy of survey precision of internal focusing telescope own and double prismatic square, can reach according to present level and to be better than 10 " level (0.048mrad), can satisfy fully at present domestic grind, at the actual operating needs of the space remote sensing instrument that passes through 45 ° of mirror scanning imageries of rail.
Description of drawings
Fig. 1 is the installing and locating correct equipment of 45 ° of scan mirrors.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model and working process are described in detail:
A. at first the 1st internal focusing telescope 1 is placed the below of optical system 6, and adjust internal focusing telescope 1, make it to overlap with the optical axis 7 of optical system 6.
B. then double prismatic square assembly 4 is placed the top of optical system, the i.e. installation site of 45 ° of scan mirrors 5, the 2nd internal focusing telescope 2 places the left side of double prismatic square assembly 4, after adjustment double prismatic square assembly 4 makes it to the 1st internal focusing telescope 1 autocollimation, take out double prismatic square 401, and, make the optical axis of the 2nd internal focusing telescope 2 and the optical axis coincidence of the 1st internal focusing telescope 1 by double prismatic square 402 reflection adjustings the 2nd internal focusing telescope 2.
C. again internal focusing telescope 3 is placed the right of double prismatic square assembly 4, remove double prismatic square 402, regulate the 3rd internal focusing telescope 3 its optical axis is overlapped with the 2nd internal focusing telescope 2.
D.45 the accurate location and installation of ° scan mirror
45 ° of scan mirrors are installed in position at double prismatic square assembly 4, regulate the regulating part of 45 ° of scan mirrors, make it in the process of rotation, three light beam coincidences that internal focusing telescope sends.Admittedly seal the regulating part of 45 ° of scan mirrors then, the accurate location and installation of 45 ° of scan mirrors finishes.
Claims (1)
1. correct equipment that is used for 45 ° of scan mirror location and installation of space remote sensing instrument comprises: three internal focusing telescopes, double prismatic square assemblies, be fixed on the optical system (6) on the remote sensing instrument base plate (8), it is characterized in that:
The 1st internal focusing telescope (1) places the below of optical system (6), and coaxial with the optical axis (7) of optical system; Double prismatic square assembly (4) places the top of optical system, i.e. the installation site of 45 ° of scan mirrors (5); The 2nd internal focusing telescope (2) and the 3rd internal focusing telescope (3) place double prismatic square assembly (4) about two limits, and be on the same optical axis, vertical with system optical axis (7); Double prismatic square assembly (4) is by two double prismatic squares (401,402) and make that its inclined-plane is staggered relatively to be formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420110482 CN2759942Y (en) | 2004-11-30 | 2004-11-30 | Correcting apparatus for positioning and mounting and 45-degrees scan mirror of space remote sensing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420110482 CN2759942Y (en) | 2004-11-30 | 2004-11-30 | Correcting apparatus for positioning and mounting and 45-degrees scan mirror of space remote sensing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2759942Y true CN2759942Y (en) | 2006-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420110482 Expired - Fee Related CN2759942Y (en) | 2004-11-30 | 2004-11-30 | Correcting apparatus for positioning and mounting and 45-degrees scan mirror of space remote sensing instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2759942Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102239422A (en) * | 2008-12-05 | 2011-11-09 | 莱卡地球***公开股份有限公司 | Telescope based calibration of a three dimensional optical scanner |
-
2004
- 2004-11-30 CN CN 200420110482 patent/CN2759942Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102239422A (en) * | 2008-12-05 | 2011-11-09 | 莱卡地球***公开股份有限公司 | Telescope based calibration of a three dimensional optical scanner |
| CN103149558B (en) * | 2008-12-05 | 2014-10-01 | 莱卡地球***公开股份有限公司 | Telescope based calibration of a three dimensional optical scanner |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |