针对目前地基空间探测红外成像系统对高灵敏度、高探测能力及信噪比的要求, 对地基冷光学红外成像技术进行了研究, 包括红外杜瓦冷却系统内部辐射抑制、系统终端快速制冷、低温红外探测器的研制、低温冷光学系统设计装调等关键技术。在各项系统技术突破的基础上, 研制出一套相对孔径1:10、分辨率320×256、兼容中波3~5 μm和长波8~10 μm波段的冷光学红外成像终端。系统终端实现制冷温度最低至42 K, 真空度10-5 Pa量级。将终端与1.23 m口径地基望远镜对接, 对月亮和红外标准星观测具有良好的成像效果。该系统的研究为地基大口径冷光学红外探测技术提供参考。

In view of the requirements of high sensitivity, high detection ability and high signal-to-noise ratio of ground-based space exploration infrared imaging system, cold optical infrared imaging technique was studied. It included infrared Dewar cooling system, internal radiation suppression, rapid cooling of terminal system, development of low temperature infrared detector, room temperature adjustment, low temperature application and other key technologies. Based on the technical breakthrough of various systems, a cold optical infrared terminal with a relative aperture of 1:10, resolution of 320×256, compatible with medium wave 3-5 μm and long wave 8-10 μm band was developed. The system terminal works in 42 K temperature, 10-5 Pa vacuum environment. Docking with 1.23 m ground-based telescopes, a good observation result of moon and infrared stars was achieved. It lays an important foundation for ground-based infrared optical detection technology.