摘要
高分辨率空间望远镜目前通常采用分块可展开主镜。对主镜进行有限元热分析获得的镜面变形数据无法直接输入光学设计软件进行像质评价,需要进行数据转换。传统的以拟合圆域正交Zernike多项式作为光机热集成分析的数据转换接口的方法不适于分析非圆孔径的分块镜。提出了采用二维插值算法进行数据转换,该方法不受光瞳形状和镜面空间频率的限制。用Matlab编制了光机热接口分析软件,分析了不同温度变化对空间望远镜分块镜成像质量的影响。仿真结果表明:热浸泡和径向热梯度对像质影响较小,而轴向热梯度对像质影响较大。
Segmented deployable primary mirror is commonly used in current high-resolution space telescope. Surface deformation data resulting from finite element thermal analysis cannot be imported to optical design software directly for image quality evaluation, so a data translation tool is needed. The traditional method is to fit circular-area-orthogonal Zernike polynomials as data translation interface, which is invalid for non-circular segmented mirror. Two-dimension interpolation method, which is not limited by pupil shape and spatial frequency of mirror surface,was proposed to achieve this translation. The influence of different temperature variation on the imaging quality of segmented mirror was analyzed by thermal- structural-optical interface software developed by Matlab. Simulation results show that axial thermal gradient has more serious effect on image quality than thermal soak and radial thermal gradient.
出处
《红外与激光工程》
EI
CSCD
北大核心
2009年第2期326-329,共4页
Infrared and Laser Engineering
关键词
光机热集成分析
分块式空间望远镜
二维插值
Thermal-structural-optical integrated analysis
Segmented space telescope
Two-dimension interpolation
