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Proceedings Paper

The research on electric method for testing co-phasing error
Author(s): Weirui Zhao; Genrui Cao
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Paper Abstract

The primary mirror's aperture limits the telescope's resolution. A segmented primary mirror is adopted to improve the resolution. Since the primary mirror with large diameter is segmented, the segmented mirrors must be co-phased to ensure the imaging quality. Optical method and electrics method can be used to test the co-phasing error between the two adjacent segment mirrors. However the optical system of telescope will be complicated by attaching an optical cophasing test system, and some unstable factors will be introduced. In this paper, an electrics co-phasing testing method was discussed. Capacitance micrometer technology was used in this method, and relevant experiments have been carried out. And the result of these experiments indicated that the method described in this paper is feasible.

Paper Details

Date Published: 28 November 2007
PDF: 5 pages
Proc. SPIE 6834, Optical Design and Testing III, 68340C (28 November 2007); doi: 10.1117/12.757162
Show Author Affiliations
Weirui Zhao, Beijing Institute of Technology (China)
Genrui Cao, Beijing Institute of Technology (China)

Published in SPIE Proceedings Vol. 6834:
Optical Design and Testing III
Yongtian Wang; Theo T. Tschudi; Jannick P. Rolland; Kimio Tatsuno, Editor(s)

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