空间大口径红外相机整机光谱响应测试方法研究

Research of spectral response measurement of space infrared camera with large aperture

对空间大口径红外相机整机光谱响应测试方法进行介绍,建立空间大口径红外相机整机光谱响应测试系统。该测试系统包括:可见及红外光源、单色仪、标准探测器、数据采集系统、平行光管、真空罐、二维转台及待测相机。待测相机的波段集中在H_2O、CO_2等吸收波段,为了消除大气吸收波段对待测相机的影响,需要将平行光管、待测相机、转台等置于真空条件下,并向单色仪中通入氮气稳定后进行测试。整机试验结果表明,通入氮气后光谱测试精度大大提高,大气吸收波段光谱可准确测试。

The spectral response measurement of space infrared camera with large aperture was introduced. The measure system had been developed, which included visible and infrared light source,monochromator, standard detectors, data acquisition system, parallel light tube, vacuum tank, turntable and the test camera. The bands of test camera were concentrated in water vapor, CO_2 absorption bands. In order to eliminate the impact of atmospheric absorption bands, parallel light tubes, test camera, turntable should be placed under vacuum condition, and the monochromator should be purged with nitrogen. The results show that, after purged with nitrogen, the spectrum precision is greatly improved and the spectrum at atmospheric absorption bands can be accurately measured.