红外与毫米波学报, 2018, 37 (5): 572, 网络出版: 2018-12-26
红外陷阱探测器的光谱辐射定标技术
Calibration technique of spectral radiation for an infrared trap detector
红外辐射定标 红外陷阱探测器 低温绝对辐射计 不确定度 infrared radiometric calibration infrared trap detector cryogenic absolute radiometer uncertainty
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谱辐射定标系统, 标定了其在1.1~3.0 μm短波红外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.
Abstract
The quantification of remote sensing information requires spectral radiometric calibration technology support with high accuracy. This technology can ensure the comparability, accuracy and long-term stability of sensor data acquisition. Now, the calibration technique traced to the cryogenic absolute radiometer is the trend of development. In order to improve the accuracy of infrared absolute spectral response, a gold-plated hemisphere reflector is added to a thermopile detector. So an infrared trap detector is developed as the standard transfer detector. The spectral response linearity, spatial response uniformity and stability of an infrared trap detector are tested by electric substitution technology. The authors also have established an infrared radiometric calibration system based on the cryogenic absolute radiometer. The combined relative uncertainty in the spectral responsivity of this detector from 1.1~3.0 μm is below 1%. The application of infrared trap detector to radiometric calibration can improve the calibration accuracy of sensors through its shorter calibration chain.
张磊, 林志强. 红外陷阱探测器的光谱辐射定标技术[J]. 红外与毫米波学报, 2018, 37(5): 572. ZHANG Lei, LIN Zhi-Qiang. Calibration technique of spectral radiation for an infrared trap detector[J]. Journal of Infrared and Millimeter Waves, 2018, 37(5): 572.