Study of bonding positions of isostatic mounts on a lightweight primary mirror

C. Y. Chan, Y. C. Chen, S. T. Chang, T. M. Huang, M. Y. Hsu

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

7 Scopus citations


The bonding positions of three isostatic mounts on the primary mirror of a Cassegrain telescope under self-weight loading have both been studied in the paper. Finite element method and Zernike polynomial fitting are complementarily applied to the ZERODUR® primary mirror with a pre-designed lightweight configuration on the back. Eight bonding positions of isostatic mounts with respect to the center of gravity of the mirror have been chosen to investigate the mirror surface deforms as well as the induced optical aberrations. It is found that astigmatism becomes remarkably higher than other optical aberrations under self-weight loading. The optimum bonding position with the least astigmatism value has also been obtained.

Original languageEnglish
Title of host publicationRemote Sensing System Engineering IV
StatePublished - 2012
EventRemote Sensing System Engineering IV - San Diego, CA, United States
Duration: 12 Aug 201213 Aug 2012

Publication series

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


ConferenceRemote Sensing System Engineering IV
Country/TerritoryUnited States
CitySan Diego, CA


  • Bonding position
  • Finite element method
  • Optical aberration
  • Zernike polynomial fitting


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