XIN Hong-wei, LIU Ju, LIU Lei etc. Support structure of primary mirror for small optical remote sensor[J]. Editorial Office of Optics and Precision Engineering, 2015,23(4): 1027-1033
XIN Hong-wei, LIU Ju, LIU Lei etc. Support structure of primary mirror for small optical remote sensor[J]. Editorial Office of Optics and Precision Engineering, 2015,23(4): 1027-1033 DOI: 10.3788/OPE.20152304.1027.
Support structure of primary mirror for small optical remote sensor
An opto-mechanical structure for a microminiature optical remote sensor was designed to obtain favorable images under a wider temperature range and severe dynamic environments. The design principle and concrete realization method of the support structure of a primary mirror and the most critical core component in the whole opto-mechanical structure of the optical remote sensor was researched. The boundedness of traditional supporting way of a primary mirror was explored through analysis on the mechanical and thermal properties of primary mirror chamber in the initial designing scheme. Then
a new-style and flexure support structure suitable for a mini-style mirror was designed based on flexible support principle. The thermal adaptability and dynamics environment suitability of the support structure were analyzed by finite element method
which verifies that the flexible support structure could meet the design requirements. In the end
the processing and concrete implementing methods of the primary mirror chamber of the optical remote sensor were presented. The experiments of thermal shock test and partial test on the primary mirror were performed. The results show after thermal shock test
the primary mirror won't appear the crack phenomenon at -60 ℃ -80 ℃. Moreover
the surface figure accuracy RMS of the mirror remains a level of 0.025λ (λ=632.8 nm) in -20 ℃ to 50 ℃. These results demonstrate that the primary mirror design satisfies the application environment requirements of the optical remote sensor.
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references
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