低温红外系统光机结构设计

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，这就给红外系统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，针对光学系统中用到的反射镜、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，保证光学系统的安全，同时保证光学系统的成像质量。该研究结果对于红外光学系统的结构和热设计有一定的参考价值。

Opto-mechanical design for a cryogenic IR system

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-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 these kinematic mount designs. The research results have important referential valve for mechanical and thermal design for IR optics system.