The application of pentaprism scanning technology on the manufacturing of M3MP

Erhui Qi; Haixiang Hu; Haifei Hu; Glen Cole; Xiao Luo; Virginia Ford; Xuejun Zhang

doi:10.1117/12.2245813

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24 October 2016 The application of pentaprism scanning technology on the manufacturing of M3MP

Erhui Qi, Haixiang Hu, Haifei Hu, Glen Cole, Xiao Luo, Virginia Ford, Xuejun Zhang

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Proceedings Volume 9682, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 96821A (2016) https://doi.org/10.1117/12.2245813
Event: Eighth International Symposium on Advanced Optical Manufacturing and Testing Technology (AOMATT2016), 2016, Suzhou, China

Abstract

The PSS (pentaprism scanning system) has advantages of simple structure, needless of reference flat, be able of on-site testing, etc, it plays an important role in large flat reflective mirror’s manufacturing, especially the high accuracy testing of low order aberrations. The PSS system measures directly the slope information of the tested flat surface. Aimed at the unique requirement of M3MP, which is the prototype mirror of the tertiary mirror in TMT (Thirty Meter Telescope) project, this paper analyzed the slope distribution of low order aberrations, power and astigmatism, which is very important in the manufacturing process of M3MP. Then the sample route lines of PSS are reorganized and new data process algorism is implemented. All this work is done to improve PSS’s measure sensitivity of power and astigmatism, for guiding the manufacturing process of M3MP.

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Erhui Qi, Haixiang Hu, Haifei Hu, Glen Cole, Xiao Luo, Virginia Ford, and Xuejun Zhang "The application of pentaprism scanning technology on the manufacturing of M3MP", Proc. SPIE 9682, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 96821A (24 October 2016); https://doi.org/10.1117/12.2245813

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