低温真空环境的红外背景模拟器的研制

Development of the low-temperature optical-infrared background simulator

红外背景模拟器是光学遥感器性能检测试验和辐射定标试验中的重要设备。针对某低温光学遥感器的光学定标试验,将仿真优化与实践经验相结合,研制了一套能够在120 K的低温真空环境中稳定工作的红外背景模拟器。该模拟器主要由真空低温面源黑体、冷光阑和电移台3部分组成。其中冷光阑的温度在90～300K范围内连续可调,且温度均匀性在±3 K以内;电移台的三维运动控制精度≤10 m。该模拟器能够适用于多种光学遥感器的红外性能检测试验和定标试验。

The infrared background simulator is an important optical remote sensing test equipment for the performance test and the radiometric calibration.Based on the simulation and the experience,a stable infrared background simulator working at 120 K low-temperature vacuum is developed,for the optical remote sensor＇s optical low-temperature calibration test.The infrared simulator includes the surface blackbody,the cold diaphragm and the transfer station.The temperature of the cold diaphragm is continuously adjustable in the range 90～300 K,and the temperature uniformity error is less than 3 K.The three-dimensional control accuracy of the transfer station≤10 m.The infrared background simulator can be applied to the infrared detection performance test and the calibration test for a variety of optical sensors.