低温光学系统对于在空间探测微弱红外目标有重要的意义。无热效应的光学系统设计保证光学系统的像质不受温度变化的影响。有限元分析方法的结构优化设计 ,在确保光学性能的前提下使系统的重量达到最轻。特殊的制造工艺充分消除零件内部应力。低温检测的结果表明 ,光学系统的温度从室温降到 10 0K的低温 ,在温度变化 185K的条件下 ,系统波面误差几乎没有变化 ,光学系统都能达到衍射极限的成像质量 Cryogenic optical systems are important for the detection of weak infrared targets in space. Optical system design without thermal effects to ensure the quality of the optical system is not affected by temperature changes. The structural optimization of the FEA method optimizes the system’s weight while ensuring optical performance. Special manufacturing process to fully eliminate internal stress components. The results of cryogenic testing showed that the optical system temperature dropped from room temperature to low temperature of 10 0K, and the system wavefront error hardly changed under the condition of 185K temperature change, and the optical system could achieve diffraction limited imaging quality