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Proceedings Paper

Figure analysis and adjustment of a large aperture reflector
Author(s): Xiao Li Chen; Ning Juan Ruan; Jun Ma; Yun Su
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Paper Abstract

The reflector is influenced by force and temperature more and more seriously with the increasing of reflector diameter. The error analysis and adjustment of reflector is important to satisfy the optical performance. In fact, the error of the reflector include figure error, position error and curvature radius error, which are often coupled and difficult to adjust. The method of the separation of the three type errors and way of adjustment are studied in this paper. The separation of the error is following the belows: first, the deformation of the nods on the reflector surface are analyzed and transfered to sag deformation; second, the position error is obtained by the least-square method and adjusted; third, the residual error is fit with the Zernike polynomial and the curvature radius error is acquired and adjusted, at last; the remained error is the high-frequency figure error. A reflector under the load of heat is simulated and analyzed in this paper with the method above. The results indicate that the error of piston and curvature radius are the major errors, so it is possible to adjust the error of piston and curvature radius alone to improve the quality of reflector in optical system, in order to simplify the mount system of the reflector.

Paper Details

Date Published: 6 May 2009
PDF: 7 pages
Proc. SPIE 7281, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 72810A (6 May 2009); doi: 10.1117/12.831434
Show Author Affiliations
Xiao Li Chen, Beijing Institute of Space Mechanics and Electricity (China)
Ning Juan Ruan, Beijing Institute of Space Mechanics and Electricity (China)
Jun Ma, Beijing Institute of Space Mechanics and Electricity (China)
Yun Su, Beijing Institute of Space Mechanics and Electricity (China)


Published in SPIE Proceedings Vol. 7281:
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes

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