相对光谱响应作为评价红外探测器性能的一个重要指标, 直接影响用户的使用情况。以中长波红外两个波段的探测器作为实验器件, 分析讨论了两种分别采用傅里叶光谱仪和单色仪的不同测试方法。对于长波红外探测器, 用单色仪和傅里叶光谱仪测得的后截止波长分别为928 m和925 m, 前截止波长均为760 m。对于中波红外探测器, 用单色仪和傅里叶光谱仪测得的后截止波长分别为486 m和485 m, 前截止波长均为360 m。结果表明, 两种测试方法所得的前截止波长完全一致, 后截止波长也在允许误差范围内, 从而验证了用这两种仪器测试相对光谱响应时的一致性和准确性。以上两种测试方法的原理通俗易懂, 操作简便, 结果准确, 为红外探测器的性能优化研究提供了一定的参考。

Relative spectral response is an important index for evaluating the performance parameters of infrared detectors, which directly affects the user′s usage. Using the detectors in the middle and long wave bands as experimental devices, two different test methods using Fourier spectrometer and monochromator are analyzed and discussed. For the long-wave infrared detector, the rear cut-off wavelengths of the monochromator and Fourier spectrometer are 928 m and 925 m, respectively, and the front cut-off wavelength is 760 m. For mid-wave infrared detectors, the rear cutoff wavelengths of the monochromator and Fourier spectrometer are 486 m and 485 m, respectively, and the front cutoff wavelengths are 360 m. The results show that the front-cut wavelengths of the two test methods are completely consistent, and the rear cutoff wavelengths are within the allowable error range, thus verifying the consistency and accuracy of the relative spectral response of the two instruments. The principles of the two test methods are easy to understand and operate, the results are accurate, which provides a certain reference for the optimization of infrared detector performance.