本文在评述低温绝对辐射计和SIRCUS发展的基础上, 讨论了基于探测器标准的光谱可调谐自校准标准光源的工作原理、发展与应用前景。在探测器型光谱辐射标准研究方面, 工作在液氦温度的低温绝对辐射计不确定度达001%。美国国家标准与技术研究院(NIST)建立的均匀光源光谱辐照度和光谱辐亮度响应度定标装置(SIRCUS)采用一系列激光器, 由低温绝对辐射计传递的硅陷阱探测器定标, 不确定度已达到01%, 成功应用于空间遥感仪器高精度辐射定标。分析认为, 发展中的基于探测器标准的光谱可调谐自校准标准光源, 定标精度高, 自行校正老化、衰减, 保证了定标精度长期稳定。

In this paper, based on reviewing the developments of absolute cryogenic radiometers and SIRCUS, the operating principle, developments, and application prospects of detector standard based, spectrally tunable, self-calibrated standard light sources are discussed. In detector-based spectroradiometric standards, absolute cryogenic radiometer operated at liquid helium temperature can achieve an uncertainty of 001%. The facility for spectral irradiance and radiance responsivity calibrations using uniform sources(SIRCUS) established at National Institute of Standards and Technology(NIST) in the United States, which uses a series of lasers and conducts calibrations with silicon trap detectors calibrated against cryogenic radiometer, has achieved an uncertainty level of 01% and has been successfully applied to radiometric calibrations for space remote sensing instruments. Analysis indicates that developing detector standard based, spectrally tunable, self-calibrated standard light source with high calibration accuracy, can self-correct aging and attenuation and ensure the long-term stability of calibration accuracy.