红外陷阱探测器的光谱辐射定标技术
投稿时间:2017-12-25  修订日期:2018-01-29  点此下载全文
引用本文:
摘要点击次数: 520
全文下载次数: 
作者单位E-mail
张磊 中国科学技术大学 精密机械与精密仪器系 lzhlzh@ustc.edu.cn 
林志强 中国科学院安徽光学精密机械研究所  
基金项目:国家自然科学基金(61775209)
中文摘要:遥感信息定量化要求高精度的光谱辐射定标技术支撑,使传感器获取数据可比较性、测量精度和长期稳定性得到保证,溯源于低温绝对辐射计的定标技术是发展趋势。为提高红外绝对光谱响应率定标精度,在一种薄膜热电堆传感器上加装镀金反射半球,研制了红外陷阱探测器作为标准传递探测器。利用电替代技术,测试了红外陷阱探测器光谱响应线性、空间响应均匀性和稳定性。通过溯源于低温绝对辐射计的光辐射定标系统和基于单色仪的红外绝对光谱响应定标系统,标定了其在1.1μm~3.0μm波段的绝对光谱响应率,合成不确定度小于1%。将红外陷阱探测器应用于红外光谱辐射定标,可缩短低温绝对辐射计的红外光谱功率标准传递链路并提高定标精度。
中文关键词:红外辐射定标  红外陷阱探测器  光谱响应率  不确定度
 
Calibration technique of spectral radiation for an infrared trap detector
Abstract:Radiometric calibration was of critical importance for information quantification of satellite remote sensing of environment,and in the field of optical remote sensing,the calibration of remote sensors played key roles. Now, transfer the standard cryogenic absolute radiometer to trap detector was the highest accuracy standard method. With a gold-plated hemisphere reflector added to a thermopile detector with electrical substituted pins, an infrared trap detector is designed and brought forward technical proposals of calibration. Established a high accurate calibration system based on cryogenic absolute radiometer and infrared spectrum calibration facility based on infrared monochromatorto calibrated the linearity, stability, spatial uniformity and absolute spectral responsibility of infrared trap detector. The combined relative uncertainty in the spectral responsivity of infrared trap detector from 1.1μm to 3.0μm was below 1%. From the results of experiment, we can conclude that the calibration technology based on this transfer detector will effectively improve the calibration accuracy of sensors through its shorter calibration chain, and increase the calibration accuracy of infrared absolute responsibility. This improvement will create a one-step scale transfer between the monochromator-based calibration systems and the cryogenic absolute radiometer.
keywords:Infrared radiometric calibration  Infrared trap detector  Spectral responsibility  Uncertainty
查看全文  查看/发表评论  下载PDF阅读器

版权所有:《红外与毫米波学报》编辑部