With the space technologies progress rapidly, demand of large-size mirrors is intensively growing. In this paper, the developing trend of large-size space mirrors was discussed from the angles of material and fabrication technology. Taking 1.0 m aperture technical validation brazed mirror as an example, the design and fabrication of segments, joining and optic machining were analyzed. In addition, the 1.0 m aperture technical validation brazed mirror was performed environmental tests including thermal-vacuum test, vibration test and anti-radiation test in order to evaluate its engineering applicability. The experimental results show that the surface figure of the 1.0 m aperture technical validation brazed mirror changed from 0.038λ (λ=632.8 nm) to 0.037λ and 0.036λ after thermo-vacuum test and vibration test. Additionally, reflectivity of the brazed mirror basically kept stable after 60Co γ-ray radiation test, indicating a brilliant application prospect.
Preparation and environmental simulation tests of large-size silicon carbide brazed reflection mirrors
First published at:Aug 31, 2020
1 Pilbratt G L. Herschel space observatory mission overview[J]. Proceedings of SPIE, 2003, 4850: 586-597. DOI:10.1117/12.461767
2 Deny P, Bougoin M. Silicon carbide components for optics: Present and near future capabilities[J]. Proceedings of SPIE, 2005, 5868: 58680G.
3 Gardner J D. The James webb space telescope: extending the science[J]. Proceedings of SPIE, 2012, 8842: 884228.
4 Greenhouse M A. The JWST Science Instrument payload: mission context and status[J]. Proceedings of SPIE, 2016, 9143: 914307.
5 Kaneda H, Naitoh M, Nakagawa T, et al. Manufacturing and optical testing of 800 mm lightweight all C/SiC optics[J]. Proceedings of SPIE, 2013, 8837: 88370I.
6 Liu Y, Ma Z. Chen J, et al. Environmental simulation evaluation of SSiC brazed optical mirrors[J]. Proceedings of SPIE, 2014, 9280: 928009. DOI:10.1117/12.2068140
7 Zhang B Z, Wang X, Wang X K, et al. Fabrication and testing of a 600mm diameter brazing SiC mirror[J]. Proceedings of SPIE, 2008, 7281: 72810O.
8 Qi Y F, Fang J Z, Yang L, et al. Investigated and development of lightweight mirror[J]. Optical Technique, 1998(3): 49–52.
10 Tsuno C, Irikado H, Ono K, et al. NTSIC (New technology SiC): the progress of recent two years[J]. Proceedings of SPIE, 2006, 10567: 1056716.
11 Boy J, Krödelb M. CESIC light-weight SiC composite for optics and structure[J]. Proceedings of SPIE, 2005, 5868: 586807. DOI:10.1117/12.617208
12 Zhang G, Zhao R C, Zhao W X, et al. Manufacture of Φ1.2m reaction bonded silicon carbide mirror blank CFID[J]. Proceedings of SPIE, 2010, 7654: 76541B. DOI:10.1117/12.866700
National Natural Science Foundation of China (51972320)
Get Citation: Liu Yan, Zhang Hui, Liu Leimin, et al. Preparation and environmental simulation tests of large-size silicon carbide brazed reflection mirrors[J]. Opto-Electronic Engineering, 2020, 47(8): 200088.