针对主焦点式光学系统的特点, 对某?700 mm极轴式望远镜光机结构部分采用模块化设计, 分别对主镜室组件、连接镜筒和校正镜镜筒和全系统结构进行了有限元分析与优化, 使系统总重不超过700 kg, 系统弯沉不超过4?。利用平行光管检测系统像质表明, 系统80%能力集中度在4×4个像元以内, 系统像质理想, 符合设计要求, 说明该结构设计合理, 同时模块化的设计使装调方便简单。

Based on the characteristic of prime focus optical system, we adopt modularization design of a ?700 mm polaxis telescope opticmechanical structure. Finite element analysis and optimization on primary mirror cell component, joint cylinder, corrective lens cylinder and the whole system structure were carried out. As a result, the whole system weight is less than 700 kg, and the system flexure doesn’t exceed 4?. The system image quality is tested by collimator, and the result indicates that the system 80% energy concentrate degree is in 4×4 pixel; the system image quality is perfect, satisfying design target; the opticmechanical structure is reasonable; the modularization design makes the assembly and adjustment is convenient and simple.