光学精密工程2017，Vol.25Issue(10)：2591-2598,8.DOI:10.3788/OPE.20172510.2591
2m SiC反射镜柔性被动支撑系统
Flexible passive support system for 2m SiC reflective mirror
摘要
Abstract
To apply SiC mirror in a ground-based telescope ,a flexible passive support system was de-signed on its high thermal expansion coefficient and high rigidity .In this system ,a thin and long flex-ible rod was used in the axial support whiffletree structure and a flexure joint rod wad used in the lat-eral support structure .By w hich ,the axial support structure and the lateral support structure could support the system respectively .This structure not only allows the primary mirror to be a good posi-tion and a shape but also easily eliminate assemble stress and thermal stress .The static analysis ,ther-mal analysis and modal analysis for the mirror were performed under the support system ,and then the analytical results were verified by a surface test ,mirror inclination test and a displacement test .The test result of the primary mirror shows that the surface error (RMS) is λ/40(the optical axis is verti-cal) and that (RMS ) isλ/16 (the optical axis is horizontal ) ,the maximum inclination change of the primary mirror at different pitch angles is 8 "and the displacement is 0 .0707 mm .The test results are basically consistent with the analysis results ,meeting the design requirements .It shows that this flexible passive support system has good engineering feasibility .关键词
SiC反射镜/柔性/被动支撑系统/whiffletree/A-frameKey words
SiC reflective mirror/flexible/passive support system/whiffletree/A-frame分类
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王富国,乔兵,张景旭..2m SiC反射镜柔性被动支撑系统[J].光学精密工程,2017,25(10):2591-2598,8.基金项目
国家自然科学基金资助项目(No.11403023) （No.11403023）
