低温红外光学透镜支撑结构研究

在低温红外光学系统中，光学元件及其支撑结构的加工和装配温度与其实际工作环境温度之间存在较大差异。根据低温红外光学系统对光机结构设计的要求，设计和加工了一套适用于低温光学透镜的柔性支撑结构。透镜的径向定位与支撑采用一组周向均布的悬臂柔性支撑结构来实现；轴向则采用压圈定位和波形垫圈来为透镜提供轴向预紧，以避免由于温差以及材料的物理性能差异与变化而造成透镜面型无法满足指标要求。试验结果表明，这种透镜支撑结构在133 K低温下具有良好的成像效果。

Research on Supporting Structure of Cryogenic Infrared Optical Lens

In a cryogenic infrared optical system, the temperature of processing and assembly of optics and its supporting structure is difference from the actual working environment. According to the requirements of cryogenic infrared optical system for optical machine structure design, a flexible supporting structure for cryogenic optical lens is designed and fabricated in this paper. The supporting structure of the optical lens is circumferentially equipped with a group of flexible and cantilevered supporting feet, which provide radial support for the optics. The waveform washer is used to provide axial support for the optics in the axial direction. Both schemes are important to avoid lens surface type not meeting indicator requirements due to temperature difference, physical property differences and changes in materials. The experimental result shows that the lens supporting structure has good imaging effect in the low temperature condition of 133 K.