Test of a prototype of lightweight, active mirrors

Wei Xin Lu; Hong Zhou; Xinlong Fan; Chunlin Guan; Changhui Rao

doi:10.1117/12.2069560

2 September 2014 Test of a prototype of lightweight, active mirrors

Wei Xin Lu, Hong Zhou, Xinlong Fan, Chunlin Guan, Changhui Rao

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.

Citation Download Citation

Wei Xin Lu, Hong Zhou, Xinlong Fan, Chunlin Guan, and 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); https://doi.org/10.1117/12.2069560

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