CN100580366C - Device for detecting distance between primary mirror and secondary mirror of large telescope - Google Patents
Device for detecting distance between primary mirror and secondary mirror of large telescope Download PDFInfo
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- CN100580366C CN100580366C CN200810101293A CN200810101293A CN100580366C CN 100580366 C CN100580366 C CN 100580366C CN 200810101293 A CN200810101293 A CN 200810101293A CN 200810101293 A CN200810101293 A CN 200810101293A CN 100580366 C CN100580366 C CN 100580366C
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Abstract
The utility model provides a detect device of large-scale telescope primary and secondary mirror interval which characterized in that includes: the device comprises an auto-collimation collimator, a pentaprism, a guide rail, a reticle, a CCD detection system and a main control computer; the guide rail is arranged in the direction parallel to the vertical diameter of the main mirror; the pentaprism is arranged on the guide rail and can translate along the vertical direction; the collimation parallel light emitted by the collimation parallel light pipe is 90-degree turned by the pentaprism and then converged on the main optical axis after passing through the telescope optical system; the reticle is arranged at the Karschner focus; the CCD detection system is used for imaging the parallel light convergence point and the reticle; the main control computer carries out mass center calculation on the image detected by the CCD detection system to obtain an image point position, the pentaprism is moved to obtain another group of image point mass center positions, the pentaprism is moved continuously to realize radial scanning of the primary mirror, the track of the image point mass center movement is obtained, and the primary mirror and the secondary mirror are processed by the main control computer to obtain the primary mirror and secondary mirror spacing error; the device realizes the automation of the distance detection between the primary mirror and the secondary mirror of the telescope, improves the detection precision and provides important guarantee for the system adjustment in the later stage of large-scale telescope development.
Description
Technical field
The invention belongs to the telescope detection technique research field in development later stage, relate to a kind of device that detects large-sized perspective glass primary and secondary mirror spacing.
Background technology
Telescopical light collecting light ability strengthens along with the increase of bore, and telescopical light collecting light ability is strong more, just can see darker farther celestial body, and this can see more early stage universe in fact exactly.The more bigbore telescope of astrophysical development need.But along with the increase of telescope bore, a series of technical matters is comed one after another, and one of problem wherein is exactly: heavy-caliber optical system is debug the detection of error.
The detection that heavy-caliber optical system is debug error often cost height, spatial resolution is low.With the scheme of sub-aperture stitching method detection Large Aperture Lenses, to expansion space measurement range, high spatial resolution, the high measurement accuracy and low-cost significant of maintenance.Wherein, obtain that corrugated, high-precision sub-aperture distributes and effectively joining method be the key of whole proposal technology, and the pentaprism light beam steering system is to carry out sub-aperture scanning, survey and obtain one of the gordian technique on corrugated, sub-aperture; Pentaprism has the optical characteristics of 90 ° of light ray bendings of making, as long as the direction of incident ray is fixed, even pentagonal prism some deflection in the principal section, the direction of emergent ray will remain vertical with incident ray, reaches accurate vertical duction; Therefore, adopting pentaprism to carry out the large telescope system, to debug error detecting technology research be exactly a very significant research topic.
Summary of the invention
The technical problem to be solved in the present invention: overcome the deficiencies in the prior art, provide a kind of pentaprism that adopts to carry out the device that the large telescope system detects the primary and secondary mirror spacing, this device is used for detecting automatically, accurately the large-sized perspective glass primary and secondary mirror spacing error, and then can instruct the adjustment of perspective glass primary and secondary mirror spacing.
The technical solution adopted for the present invention to solve the technical problems is: a kind of device that detects large-sized perspective glass primary and secondary mirror spacing, be used to detect the primary mirror of formation main optical path system of large telescope and the spacing between the secondary mirror, it is characterized in that: form by auto-collimation collimator, pentaprism, guide rail, graticule, CCD detection system and main control computer;
Working face of guide rail is installed in and is parallel on the vertical diametric(al) of primary mirror;
Pentaprism is installed on the guide rail and translation vertically;
The standard parallel beam of auto-collimation collimator output go-no-go along being parallel to telescope primary optical axis directive primary mirror, behind telescopic system, converges at system Cassegrain focus place after 90 ° of turnovers of pentaprism;
Graticule places telescopical Cassegrain focus place;
The CCD detection system is used for directional light convergent point and graticule imaging;
Main control computer carries out centroid calculation to the image that the CCD detection system detects, obtain image point position, obtain another group picture point centroid position behind the mobile pentaprism, continue mobile pentaprism and can realize radial scan primary mirror, obtain the track of picture point center of mass motion, to be used to detect the spacing of primary and secondary mirror.
The directional light relative aperture pentaprism bore of described auto-collimation collimator output is little, and perpendicular to the end face of pentaprism.
Described CCD detection system comprises ccd detector and variable times of focusing lens.
Described guide rail should make the pentaprism direction of motion and the vertical diameter of primary mirror that are installed on the guide rail overlap with the distance of the vertical diameter of primary mirror.
Described guide rail adopts step motor drive, and the pentaprism that is installed on the guide rail can be along guide rail direction stepping translation.
Described main control computer is by communicating by letter with stepper motor, and the pentaprism that control is installed on the guide rail is made high precision translational.
The principle of work of apparatus of the present invention: the directional light that auto-collimation collimator sends arrives the telescopic system primary mirror after 90 ° of turnovers take place pentaprism, after the telescopic optical system of primary mirror and secondary mirror composition,, converge on the telescopic optical system primary optical axis from the center pit output of primary mirror; When there was error in the primary and secondary mirror spacing, the beam convergence point of exporting from the primary mirror center pit may just form a disc of confusion in Cassegrain focus front or back on graticule; By the step motor drive guide rail, thereby the control pentaprism is done the stepping translation along guide rail, realizes that directional light to the translation scan in the radial direction of primary mirror, owing to have error between the primary and secondary mirror, causes also can changing at the picture point centroid position at Cassegrain focus place; Can monitor in real time the motion size and Orientation of picture point in the CCD detection system that graticule is placed later, carry out to obtain the picture point movement locus after centroid detection is handled through main control computer, thereby calculate the size of primary and secondary mirror spacing error, can be according to bigger than normal as if the opposite then primary and secondary of picture point direction of motion mirror spacing with pentaprism motion side, if the identical then primary and secondary with pentaprism motion side of picture point direction of motion mirror spacing is less than normal, and then it is carried out adjustment.
The present invention compared with prior art has following advantage:
1. the invention solves the primary and secondary mirror spacing adjustment problem of large scale telescopic system, utilize the pentaprism scan mode very big to detected telescopical yardstick extendability, because this pick-up unit no longer needs other accurate optical instrument, system cost is lower;
2. the present invention has utilized stepper motor driver to drive the pentaprism accurate displacement, can realize high-precision automatic control, and detection efficiency is very high;
3. the present invention has adopted CCD high precision image Detection Techniques, and has adopted ripe centroid detection algorithm, can calculate the position of picture point on graticule quickly and accurately, and can obtain the movement locus of picture point, can easily calculate primary and secondary mirror spacing error;
4. the present invention has adopted variable times of CCD imaging lens, can increase system's field range, and the interval error interior in a big way to the primary and secondary mirror can both detect.
Description of drawings
Fig. 1 is guide rail, pentaprism and telescope primary mirror location diagram;
Fig. 2 is graticule and CCD detection system structural drawing;
Fig. 3 is the division of the graticule synoptic diagram;
Fig. 4 is a primary and secondary mirror spacing detection system synoptic diagram;
1 is primary mirror among the figure, and 2 is secondary mirror, and 3 is pentaprism, and 4 is auto-collimation collimator, and 5 is graticule, and 6 is the CCD detection system, and 7 is main control computer, and 8 is displacement driver, and 9 is guide rail.
Embodiment
Introduce the present invention in detail below in conjunction with the drawings and the specific embodiments.
Figure 1 shows that guide rail, pentaprism and primary mirror location diagram, the installation direction and the direction of motion of pentaprism have been provided among the figure, pentaprism 3 is installed on the guide rail 9, guide rail 9 adopts step motor drive, pentaprism 3 can be along guide rail 9 direction stepping translations, the workplace of guide rail 9 is installed in and is parallel to primary mirror 1 vertical diametric(al), with the distance of primary mirror 1 vertical diameter the direction of motion of the pentaprism 3 that is installed on the guide rail 9 and primary mirror 1 vertical diameter are overlapped, the base of guide rail 9 directly is connected on the primary mirror support (four-way).
Fig. 2 is graticule and CCD detection system structural drawing, and graticule is positioned at telescope Cassegrain focus place, the CCD detection system is integrated ccd image detector and variable times of focusing lens;
The division of the graticule synoptic diagram of Fig. 3 can limit the picture point relative position relation, handles for successive image and provides convenience;
Fig. 4 is a primary and secondary mirror spacing detection system synoptic diagram, apparatus of the present invention are made up of auto-collimation collimator 4, pentaprism 3, guide rail 9, graticule 5, CCD detection system 6 and main control computer 7, and wherein auto-collimation collimator 4 can send the standard directional light of go-no-go; CCD detection system 6 is formed by becoming times camera lens and camera, and for obtaining sharply defined image, distance is adjustable within the specific limits with respect to graticule 5 to require CCD detection system 6; The accurate automatically controlled guide rail 9 of long stroke is near more good more apart from the distance of primary mirror, is beneficial to the raising sweep limit, because scan near the primary mirror central area, pentaprism is apart from primary mirror easy more being in the light far away more; All the other each several parts are installed and should be guaranteed the common optical axis of optical system along the optical axis direction precise alignment.
The directional light that auto-collimation collimator 4 sends arrives telescope primary mirror 1 after 90 ° of turnovers take place pentaprism 3, from the output of primary mirror 1 center pit, converge on the primary optical axis after the telescopic optical system of primary mirror 1 and secondary mirror 2 compositions.When the primary and secondary mirror spacing does not have error, from the beam convergence of primary mirror center pit output at Cassegrain focus, i.e. 5 seated position of graticule; When there was error in the primary and secondary mirror spacing, the beam convergence point of exporting from the primary mirror center pit may promptly just form a disc of confusion in Cassegrain focus front or back on graticule 5; Like this, along with directional light at primary mirror 1 radial direction translation scan, picture point centroid position at the Cassegrain focus place also can change, the CCD detection system 6 of placing later at graticule can be monitored in real time to the motion size and Orientation of picture point at last, carry out to obtain the picture point movement locus after centroid detection is handled through main control computer 7, get big or small thereby calculate primary and secondary mirror spacing error.
Control system working method of the present invention is open loop control, moves radially at primary mirror 1 by regulating pentaprism 3, obtains different picture point centroid positions on graticule 5.
Apparatus of the present invention can also be carried out adjustment to the interval error of primary and secondary mirror, CCD detection system 6 is in the process that the motion size and Orientation of picture point is monitored in real time, if there is error in the primary and secondary mirror spacing, if picture point direction of motion is bigger than normal with pentaprism 3 motion sides opposite then primary and secondary mirror spacing, if picture point direction of motion is less than normal with pentaprism 3 motion sides identical then primary and secondary mirror spacing, can instruct the primary and secondary mirror spacing to regulate according to this criterion, picture point is not moved with pentaprism 3, finish the adjustment of primary and secondary mirror spacing.
Claims (8)
1, a kind of device that detects large-sized perspective glass primary and secondary mirror spacing, be used to detect the primary mirror (1) of formation main optical path system of large telescope and the spacing between the secondary mirror (2), it is characterized in that: form by auto-collimation collimator (4), pentaprism (3), guide rail (9), graticule (5), CCD detection system (6) and main control computer (7);
Guide rail (9) workplace is installed in and is parallel on the vertical diametric(al) of primary mirror (1);
Pentaprism (3) is installed in guide rail (9) and goes up and translation vertically;
The standard parallel beam of auto-collimation collimator (4) output go-no-go is after (3) 90 ° of turnovers of pentaprism, along being parallel to telescope primary optical axis directive primary mirror (1), behind telescopic system,, converge on the primary optical axis of telescopic optical system from the output of primary mirror (1) center pit;
Graticule (5) places telescopical Cassegrain focus place;
CCD detection system (6) is used for directional light convergent point and graticule (5) imaging;
Main control computer (7) carries out centroid calculation to the image that CCD detection system (6) detects, obtain image point position, obtain another group picture point centroid position behind the mobile pentaprism (3), continue mobile pentaprism (3) and can realize radial scan primary mirror (1), obtain the track of picture point center of mass motion, to be used to detect the spacing of primary and secondary mirror.
2, a kind of device that detects large-sized perspective glass primary and secondary mirror spacing according to claim 1 is characterized in that: directional light relative aperture pentaprism (3) bore of auto-collimation collimator (4) output is little, and perpendicular to the end face of pentaprism (3).
3, a kind of device that detects large-sized perspective glass primary and secondary mirror spacing according to claim 1 is characterized in that: CCD detection system (6) comprises ccd detector and variable times of focusing lens.
4, a kind of device that detects large-sized perspective glass primary and secondary mirror spacing according to claim 1 is characterized in that: guide rail (9) should make pentaprism (3) direction of motion and the vertical diameter of primary mirror (1) that are installed on the guide rail overlap with the distance of the vertical diameter of primary mirror (1).
5, a kind of device that detects large-sized perspective glass primary and secondary mirror spacing according to claim 1 is characterized in that: guide rail (9) adopts step motor drive, and the pentaprism (3) that is installed on the guide rail (9) can be along guide rail (9) direction stepping translation.
6, a kind of device that detects large-sized perspective glass primary and secondary mirror spacing according to claim 1 is characterized in that: main control computer (7) is by communicating by letter with stepper motor, and the pentaprism (3) that control is installed on the guide rail is made high precision translational.
7, a kind of device that detects large-sized perspective glass primary and secondary mirror spacing according to claim 1, it is characterized in that: when whether error being arranged between primary mirror (1) and the secondary mirror (2), from the beam convergence of primary mirror (1) center pit output at Cassegrain focus, i.e. graticule (5) institute seated position; When having error between primary mirror (1) and the secondary mirror (2), may be from the beam convergence point of primary mirror (1) center pit output in Cassegrain focus front or back, form a disc of confusion and go up at graticule (5).
8, a kind of device that detects large-sized perspective glass primary and secondary mirror spacing according to claim 1, it is characterized in that: this device can also carry out adjustment to the error between primary mirror (1) and the secondary mirror (2), CCD detection system (6) is in the process that the motion size and Orientation of picture point is surveyed, when there is error in the primary and secondary mirror spacing, if picture point direction of motion is bigger than normal with pentaprism (3) motion side opposite then primary and secondary mirror spacing, if picture point direction of motion is less than normal with pentaprism (3) motion side identical then primary and secondary mirror spacing, instruct the primary and secondary mirror spacing to regulate according to this criterion, picture point is not moved with pentaprism (3), finish the adjustment of primary and secondary mirror spacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810101293A CN100580366C (en) | 2008-03-03 | 2008-03-03 | Device for detecting distance between primary mirror and secondary mirror of large telescope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810101293A CN100580366C (en) | 2008-03-03 | 2008-03-03 | Device for detecting distance between primary mirror and secondary mirror of large telescope |
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| CN101236073A CN101236073A (en) | 2008-08-06 |
| CN100580366C true CN100580366C (en) | 2010-01-13 |
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| CN200810101293A Expired - Fee Related CN100580366C (en) | 2008-03-03 | 2008-03-03 | Device for detecting distance between primary mirror and secondary mirror of large telescope |
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|---|---|---|---|---|
| EP2461132A1 (en) | 2010-12-02 | 2012-06-06 | Leica Geosystems AG | Telescope for use in a measuring instrument and method of automated auto-collimation of a telescope of a measuring instrument with an auto-collimation target |
| CN104062753B (en) * | 2014-06-16 | 2016-06-15 | 苏州理欧电子科技有限公司 | A kind of photoelectric auto-collimator |
| CN105674934B (en) * | 2016-01-25 | 2018-06-12 | 西安应用光学研究所 | A kind of assay method for being used for the catadioptric system optical interval containing hollow primary mirror |
| CN105589191B (en) * | 2016-02-03 | 2018-04-17 | 中国科学院云南天文台 | The focus cameras and its focus adjustment method confocal for adjusting astronomical telescope system |
| CN106990502B (en) * | 2017-06-14 | 2019-11-22 | 上海航天控制技术研究所 | Cattell optical module Method of Adjustment |
| CN112285941B (en) * | 2020-10-29 | 2022-07-12 | 中国航空工业集团公司洛阳电光设备研究所 | Method for assembling and adjusting clamp type light pipe |
| CN114333521A (en) * | 2021-12-10 | 2022-04-12 | 麦克奥迪实业集团有限公司 | Interactive physical teaching spectrometer and spectrometer-based interactive teaching system |
| CN114279687B (en) * | 2021-12-17 | 2023-01-03 | 中国科学院长春光学精密机械与物理研究所 | Measuring device and measuring method for relative deflection of primary mirror and secondary mirror |
| CN115235414B (en) * | 2022-07-11 | 2023-12-19 | 中国科学院长春光学精密机械与物理研究所 | Method for detecting and correcting pointing change of large-caliber telescope |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2066570U (en) * | 1990-07-02 | 1990-11-28 | 中国计量科学研究院 | Standard measuring instrument for optic space angle |
| CN2116889U (en) * | 1992-04-25 | 1992-09-23 | 国家技术监督局北京计量仪器厂 | Level collimation axes measuring device |
| EP1067363A2 (en) * | 1999-07-09 | 2001-01-10 | Kabushiki Kaisha Topcon | Surveying system |
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2008
- 2008-03-03 CN CN200810101293A patent/CN100580366C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2066570U (en) * | 1990-07-02 | 1990-11-28 | 中国计量科学研究院 | Standard measuring instrument for optic space angle |
| CN2116889U (en) * | 1992-04-25 | 1992-09-23 | 国家技术监督局北京计量仪器厂 | Level collimation axes measuring device |
| EP1067363A2 (en) * | 1999-07-09 | 2001-01-10 | Kabushiki Kaisha Topcon | Surveying system |
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