【摘要】 随着空间光学技术的飞速发展，高性能空间光学载荷对分子污染防控提出了更高要求，必须在载荷设计初期开展分子污染传输与沉积的仿真分析，以更好地提供反馈并指导载荷设计。针对利用传统Monte Carlo方法进行空间分子污染仿真对复杂结构处理耗时长的问题，基于气体扩散方程创新性地开展空间分子污染传输与沉积行为的仿真分析，得到了敏感镜面的污染物沉积量分布数据，并结合地面试验对污染效应进行测试分析，结果表明分子污染可导致敏感镜面在轨3年后的光学性能衰减量达5.3%。研究结果可为空间光学器件的设计和开发提供指导。更多还原

【Abstract】 With the rapid development of space optics technology, high-performance space optical payloads raise higher requirements for the mitigation of molecular contaminations. It is necessary to carry out simulation analysis of molecular contamination transmission and deposition at the initial stage of payload design, so as to provide better feedback and to guide payload design. In view of the time-consuming feature of conventional Monte Carlo method to deal with complex structures when simulating space molecular contamination, an innovative simulation analysis on molecular contamination transmission and deposition in space based on gas diffusion equations was carried out to obtain the distribution data of contamination deposited on the sensitive lens in this work. The contamination effects were also investigated by ground experiments and the results indicated that molecular contamination can lead to an attenuation of 5.3% in the optical performance of sensitive lens after three years in orbit. The results may provide some guidance for the design and development of space optical devices.更多还原