The optical performance test and analysis of primary and secondary mirrors of a Cassegrain telescope

Wei Cheng Lin, Shenq Tsong Chang*, Ting Ming Huang, Yu Chuan Lin, Ming Ying Hsu, Cheng-Huan Chen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The optical payload of developing space-borne remote sensing instrument is a Cassegrain telescope with 466 mm clear aperture. The optical surfaces of primary and secondary mirrors of this telescope are both aspherical surface. Whether using CGH or null lens for testing aspherical surface, the technique of alignment is challenging and complex. In this article, the new testing method and analysis algorithm called bench test is presented. The Zernike coefficients of residual manufactured form error and deformation caused by external force and gravity effect will be analyzed by wavefront measurement with rotating primary and secondary mirror individually. According to the analyzed Zernike coefficients from the form error of primary and secondary mirror, the best orientation of secondary mirror refer to primary mirror will be simulated by optical software. As the result, it is an effective way to compensate residual manufactured form error for primary and secondary mirror to gain the best optical performance for the system.

Original languageEnglish
Title of host publication34th Asian Conference on Remote Sensing 2013, ACRS 2013
PublisherAsian Association on Remote Sensing
Pages4720-4727
Number of pages8
ISBN (Print)9781629939100
StatePublished - 1 Jan 2013
Event34th Asian Conference on Remote Sensing 2013, ACRS 2013 - Bali, Indonesia
Duration: 20 Oct 201324 Oct 2013

Publication series

Name34th Asian Conference on Remote Sensing 2013, ACRS 2013
Volume5

Conference

Conference34th Asian Conference on Remote Sensing 2013, ACRS 2013
CountryIndonesia
CityBali
Period20/10/1324/10/13

Keywords

  • Cassegrain telescope
  • CGH
  • Manufactured form error
  • Null lens
  • Zernike coefficients

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  • Cite this

    Lin, W. C., Chang, S. T., Huang, T. M., Lin, Y. C., Hsu, M. Y., & Chen, C-H. (2013). The optical performance test and analysis of primary and secondary mirrors of a Cassegrain telescope. In 34th Asian Conference on Remote Sensing 2013, ACRS 2013 (pp. 4720-4727). (34th Asian Conference on Remote Sensing 2013, ACRS 2013; Vol. 5). Asian Association on Remote Sensing.