MCT探测器相对光谱响应度测量及漂移修正研究  

Study on Relative Spectral Responsivity Measurement and Drift Correction of MCT Detector

作　　者：王琪雯 赵云龙 安保林 卢小丰[2] 杨成志 王高[1] 董伟[2] 李仰军[1] WANG Qiwen;ZHAO Yunlong;AN Baolin;LU Xiaofeng;Yang Chengzhi;WANG Gao;DONG Wei;LI Yangjun(North University of China,Taiyuan,Shanxi 030051,China;National Institute of Metrology,Beijing 100029,China)

机构地区：[1]中北大学,山西太原030051 [2]中国计量科学研究院,北京100029

出　　处：《计量学报》2025年第2期160-166,共7页Acta Metrologica Sinica

基　　金：国家重点研发计划(2022YFF0610804);中央级公益性科研项目(AKYYJ2202)。

摘　　要：MCT探测器作为光电探测器的关键元件,其响应度的准确测量对于保证系统的探测精度至关重要。然而,探测器响应度会随温度变化、材料老化以及环境条件的波动产生漂移,影响测量结果的可靠性。现有研究多集中于MCT探测器的波长响应特性,但对漂移问题的研究较为薄弱。以热释电探测器为标准探测器,搭建了光电探测器相对光谱响应度测量系统,测量了MCT探测器3.5~5μm的相对光谱响应度,并与已有结果进行对比。实验通过重复切换热释电探测器和MCT探测器,测量了热释电探测器信号的重复性。研究了相对光谱响应度测量典型时间段内MCT探测器随时间的漂移特性,提出了以序列交叉测量方法和线性修正系数来修正准线性漂移影响,将MCT探测器的相对光谱响应度测量结果的相对标准偏差由0.74%降低到了0.38%;利用线性修正系数进行修正更适用于快速的MCT探测器相对光谱响应度的测量。As a key component of photodetector,accurate measurement of the responsivity of MCT detector is very important to ensure the detection accuracy of the system.However,the detector responsivity will drift with temperature changes,material aging,and fluctuations in environmental conditions,affecting the reliability of the measurement results.Most of the existing research focuses on the wavelength response characteristics of MCT detectors,but the research on the drift problem is relatively weak.Using pyroelectric detector as the standard detector,the relative spectral responsivity measurement system of photodetector was built.The relative spectral responsivity of MCT detector in 3.5~5μm was measured and compared with the existing results.The repeatability of the pyroelectric detector signal was measured experimentally by repeatedly switching the pyroelectric detector and MCT detector.The drift characteristics of MCT detector with time in a typical period of relative spectral responsivity measurement were studied,and a sequence cross measurement method was proposed to correct the quasi-linear drift effect.The relative standard deviation of the relative spectral responsivity measurement results of MCT detectors was reduced from 0.74%to 0.38%.The use of linear correction coefficients for correction is more suitable for measuring the relative spectral responsivity of fast MCT detectors.

关 键 词：光学计量 相对光谱响应度 MCT探测器 漂移特性 热释电探测器 

分 类 号：TB96[机械工程—光学工程]