The research on electric method for testing co-phasing error

Weirui Zhao*, Genrui Cao

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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.

Original languageEnglish
Title of host publicationOptical Design and Testing III
DOIs
Publication statusPublished - 2008
EventOptical Design and Testing III - Beijing, China
Duration: 12 Nov 200715 Nov 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6834
ISSN (Print)0277-786X

Conference

ConferenceOptical Design and Testing III
Country/TerritoryChina
CityBeijing
Period12/11/0715/11/07

Keywords

  • Capacitance micrometer technology
  • Co-phasing demarcation
  • Co-phasing error
  • Segmented mirror

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