从国际不确定度工作组制定的《测量不确定度表示指南》入手,建立辐射定标光学系统的精度分析模型,确定影响定标精度的各误差源和不确定度分量,采用仿真分析、统计计算、查阅手册,结合试验数据等多种方法计算各自数值,得到系统相对常差和合成相对标准不确定度。结果表明:黑体辐射源定标系统常差为0.012,不确定度为1.07%;积分球系统常差为0.024,不确定度为2.51%,定标系统性能良好。通过研究,建立了一种分析模拟空间环境下光学试验精度的指导性方法。 Starting from the Guide for Indicating the Measurement Uncertainty formulated by the Working Group on International Uncertainty, this paper establishes the accuracy analysis model of the radiation calibration optical system, and determines the error sources and the components of uncertainty which affect the calibration accuracy. The simulation analysis and statistics Calculation, access to manuals, combined with test data and other methods to calculate their respective values, the system is relatively constant and the relative standard uncertainty of synthesis. The results show that the calibration system of blackbody radiation source has a constant error of 0.012 and an uncertainty of 1.07%. The constant error of the integrating sphere system is 0.024 and the uncertainty is 2.51%. The performance of calibration system is good. Through the research, an instructional method of analyzing the optical experiment precision in the simulated space environment was established.