28 November 2007 The research on electric method for testing co-phasing error
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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.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Weirui Zhao, Weirui Zhao, Genrui Cao, Genrui Cao, } "The research on electric method for testing co-phasing error", Proc. SPIE 6834, Optical Design and Testing III, 68340C (28 November 2007); doi: 10.1117/12.757162; https://doi.org/10.1117/12.757162


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