光学精密工程2025，Vol.33Issue(21)：3343-3351,9.DOI:10.37188/OPE.20253321.3343
大口径主焦点望远镜的滤光轮机构设计与试验
Design and testing of filter wheel mechanism for large-aperture prime focus telescope
摘要
Abstract
To satisfy the multi-band observation requirements of ground-based large-aperture prime-focus telescopes,the structural configurations of filter-switching mechanisms were compared and analyzed.To overcome limitations of conventional filter wheels,a novel circumferentially distributed filter-wheel mecha-nism arranged along the optical axis was developed,permitting sequential insertion and retraction of filters with different transmission bands into the optical path.The mechanism comprises a drive assembly and a filter assembly.Relative to traditional designs,this configuration obviates the need for optical-axis offset during installation,makes full use of the circumferential space around the optical axis,and reduces prima-ry-mirror obscuration.The composition and operating principle of the mechanism are described,followed by component-selection calculations for critical parts.Modal analysis yields a first-order natural frequency of 108 Hz.The mechanism was further evaluated through switching-accuracy measurements,surface-fig-ure accuracy tests of the filters,and high-low temperature environmental testing.Results show a maxi-mum filter eccentricity error of 0.1 mm after insertion,root-mean-square surface-figure errors for all filters better than λ/30,and smooth,jam-free operation across the system's operational temperature range.These results demonstrate that the proposed filter-wheel mechanism meets the multi-band observation re-quirements of large-aperture prime-focus telescopes and offers a novel approach to filter-wheel design.关键词
滤光轮机构/主焦点/圆周均布/滤光片/高低温试验Key words
filter wheel mechanism/prime focus/circumferentially distributed/filter/high-low tempera-ture environmental test分类
机械制造引用本文复制引用
姜海波,赵金宇,郭鹏,贺昌龙,邵亮,姜晰文..大口径主焦点望远镜的滤光轮机构设计与试验[J].光学精密工程,2025,33(21):3343-3351,9.基金项目
吉林省自然科学基金资助项目(No.20240101309JC) （No.20240101309JC）
