Research on key technical issues of contact method for large diameter off-axis aspheric segments

ZiBo Jiang; XinNan Li; YongJun Liang; Bo Li; BinBin Yu; Zhe Chen

doi:10.1117/12.2232200

22 July 2016 Research on key technical issues of contact method for large diameter off-axis aspheric segments

ZiBo Jiang, XinNan Li, YongJun Liang, Bo Li, BinBin Yu, Zhe Chen

Proceedings Volume 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II; 99120B (2016) https://doi.org/10.1117/12.2232200
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

The research works are summarized for Φ1.1m off-axis aspheric segments which are scaled-down TMT segments polished by NIAOT using SMAP (Stressed Mirror Annular Polishing) method in the previous phase and testing preparations for 1.45m mirrors. The detailed introduction is given on result of errors analysis in contact detection testing of segments. In the second part, the selected basis of sampling number for contact-type detector arrays and the terms number of Zernike polynomials we need are studied. And the situations on orthogonality destruction of Zernike polynomials in discrete points sampling case and spectral analysis for each order Spherical aberrations in continuous sampling are introduced.

Citation Download Citation

ZiBo Jiang, XinNan Li, YongJun Liang, Bo Li, BinBin Yu, and Zhe Chen "Research on key technical issues of contact method for large diameter off-axis aspheric segments", Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99120B (22 July 2016); https://doi.org/10.1117/12.2232200

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