2 September 2014 Test of a prototype of lightweight, active mirrors
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Proceedings Volume 9280, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 92800U (2014) https://doi.org/10.1117/12.2069560
Event: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2014), 2014, Harbin, China
Abstract
Lightweight mirrors have been used widely in ground-based imaging systems and astronomical telescopes, because of their light weight and good stiffness. However, space telescope mirrors cannot maintain their initial surface shape due to the effects such as gravity release, thermal changes in the space and so on. To deal with the problem, a new type of lightweight, active primary mirrors which are rib-stiffened and contain surface-parallel actuators embedded in the recess of the ribs, are designed for potentially using in space-based imaging systems. They enable larger primary aperture to improve resolution and sensitivity and are capable of on-orbit surface shape correction, which can control the shape of the mirrors to optical tolerances. According to the previous optimized parameters a prototype of lightweight, active mirrors is fabricated and tested. The influence functions of the fabricated prototype are measured by using a Veeco interferometer and the correctability for the Zernike aberrations is simulated. The results show that it has a good fitting ability for low order Zernike aberrations.
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Wei Xin Lu, Wei Xin Lu, Hong Zhou, Hong Zhou, Xinlong Fan, Xinlong Fan, Chunlin Guan, Chunlin Guan, Changhui Rao, Changhui Rao, } "Test of a prototype of lightweight, active mirrors", Proc. SPIE 9280, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 92800U (2 September 2014); doi: 10.1117/12.2069560; https://doi.org/10.1117/12.2069560
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