红外光学系统在**、航空航天、民用等领域应用越来越广, 系统面临的外界环境复杂多变。只用光学分析软件来评估系统性能的传统方法不仅无法综合考虑不同材料间耦合影响, 也不能较为准确地描述热物理梯度场, 因此对结果的精确性分析略显不足, 而光机热集成分析是综合多物理场作用的有效方法, 涵盖了光学、机械、热学三个方向对系统性能的影响因素。通过研究Zernike多项式拟合算法, 编制了学科间的数据转换程序, 实现了分析模块间的数据传输, 并在热不敏红外系统的设计过程中采用光机热集成分析方法得到高低温工况下的光学系统传递函数, 为指导系统设计改进、提高系统性能提供了有力的理论依据。

Infrared optical systems, facing with complex external environment, are widely used in military, aerospace, civil and other fields. The traditional method for evaluating system performance just by Optical Analysis Software should be improved, and thermal/structural/optical (TSO) integrated analysis is an effective method for synthesizing effects of multiple physical fields, which include optics, mechanics and thermology. The data conversion program between disciplines was compiled after researching Zernike polynomial fitting algorithm. The interface problem of data transmission in optical mechanical and thermal program was solved, and the thermal insensitivity optical system design was carried out using the TSO integrated analysis, as an example. The optical transfer function of infrared system under the high and low temperature environment was obtained by TSO integrated analysis, which provides a theoretical basis for the improvement of system design and performance.