光学精密工程2011，Vol.19Issue(6)：1213-1220,8.DOI:10.3788/OPE.20111906.1213
离轴三反射系统的热光学分析和温控指标的制定
Thermal optical analysis of off-axis three-mirror system and its thermal control requirements
摘要
Abstract
In the space, temperature is the key factor influencing the optical system imaging quality. To investigate the effect of temperature on the off-axis three mirror system,a thermal optical analysis method from finite element analysis to optical analysis was presented. On the basis of analysis results of the optical system in uniformly distributed temperature fileds,the surface aberration of mirrors with temperature gradients was obtained by using a finite element analysis software, and the surfaces with aberration were fitted with the Zernike Polynomials. Then,the Zernike coefficients were carried into the software CODE V, the imaging qualities of the system with difference temperature gradients were analyzed, and thermal control requirements were determined. Finally, a thermal optical experiment was carried out to test the optical system with active thermal controls. Experimental results show that the MTF of full field in the optical system is more than 0. 2 in 56 lp/mm,which means the optical parameters meet the the requirements of optical system. Results also verify the correctness of the theoryand the reasonably of thermal control requirements.关键词
离轴三反射系统；热光学；有限元模型；调制传递函数Key words
off-axis three mirror system/thermal optics/finite element model/Modulation Transfer Function(MTF)分类
航空航天引用本文复制引用
巩盾,田铁印,王红..离轴三反射系统的热光学分析和温控指标的制定[J].光学精密工程,2011,19(6):1213-1220,8.基金项目
国家自然科学资金资助项目(No.60507003) （No.60507003）
