低温红外系统光机结构设计-红外与激光工程.PDFVIP

第42 卷第8 期 红外与激光工程 2013 年8 月 Vol.42 No.8 Infrared and Laser Engineering Aug.2013 低温红外系统光机结构设计 周 超 ( 中国科学院长春光学精密机械与物理研究所，吉林长春 130033) 摘 要 随着红外技术的发展，大口径望远镜越来越多地使用了红外设备终端。红外设备需要在低温 下工作，这就给红外系 的光机结构设计带来了难度。为了解决光学部件需要安装定位精确，又要保 证在低温环境下不会因为热应力导致破坏的问题，从理论上介绍了运动学定位的原理，针对光学系 中用到的反射镜、透镜、滤光轮等进行了详细的结构设计，实现了运动学安装定位。通过这些设计可 以很好地解决光学件在冷却过程中的精确定位和无应力之间的矛盾，保证光学系 的安全, 同时保证 光学系 的成像质量。该研究结果对于红外光学系 的结构和热设计有一定的参考价值。 关键词 红外系 ； 低温光学； 光机结构； 运动学安装 中图分类号 TH751 文献标志码 A 文章编号 1007-2276(2013) 08-2092-05 Opto鄄mechanical design for a cryogenic IR system Zhou Chao (Changchun Institute of Optics , Fine Mechanics and Physics , Chinese Academy of Sciences , Changchun 130033, China) Abstract: With the development of IR technology , more and more IR instruments were used on large telescopes . A cryogenic circumstance was necessary for IR instruments operation, this sets many technical challenges for opto鄄mechanical design. Optical parts need accurate mounting and positioning, meanwhile they must not be cracked or breaked by thermal stresses during cryogenic . In order to solve this problem, the kinematic mount theory was presented , detailed mechanical design for all reflecting mirrors, lens, filter wheels used in optical systems were proceeded and kinematic mount was realized by these designs. The conflict between firmly fixing the optics and preventing stresses within the optics during cooling was well settled via these kinematic mount designs. Optical system security and imaging quality during cooling were well ensured by thes