真空条件下低温红外辐射测量技术研究

针对红外载荷在轨服役期间低温目标的红外辐射探测需求，提出一种真空条件下的低温红外辐射测量方案，并研制了测量装置。测量装置主要由低温红外光学系统、低温机械结构、低温红外探测系统及微弱信号处理系统构成。低温红外辐射经过光学系统会聚到探测器像面，锁相放大器利用相干检测技术将目标信号提取，完成低温红外辐射的测量。测量装置研制完成后，在真空仓内使用标准黑体辐射源，在198 K～423 K温度范围内进行了低温红外辐射定标试验，取得了有效的试验数据，测量不确定度在5%以内。该文提出的真空条件下低温红外辐射测量技术可为在轨空间红外载荷低温红外目标探测设计提供重要数据支撑。

Research on low-temperature infrared radiation measurement technology under vacuum condition

According to the requirement of infrared radiation detection of low-temperature targets during the period of infrared payload serving in orbit, a low-temperature infrared radiation measurement scheme under vacuum condition was proposed, and the measuring device was developed. The measuring device was mainly composed of a low-temperature infrared optical system, a low-temperature mechanical structure, a low-temperature infrared detection system and a weak signal processing system. The low-temperature infrared radiation was gathered to the detector image plane through the optical system, the lock-in amplifier used coherent detection technology to extract the target signal, and the low-temperature infrared radiation was measured. After the development of the measuring device completed, the standard black body radiation source was used in the vacuum chamber to perform a low-temperature infrared radiation calibration test in the temperature range of 198 K to 423 K, which obtained the effective test data and the measurement uncertainty was within 5%. The proposed low-temperature infrared radiation measurement technology under vacuum condition can provide important data support for the design of low-temperature infrared target detection of infrared payload in orbital space.