高精度的分光光度计测量光谱透过率.pdf

第 33 卷第 12 期 光电工程 Vol.33, No.12 2006 年 12 月 Opto-Electronic Engineering Dec, 2006 文章编号：1003-501X(2006)12-0032-07 高精度分光光度计测量光谱透过率 1, 2 1 周 磊 ，郑小兵 ( 1. 中国科学院安徽光学精密机械研究所 遥感室，安徽 合肥 230031 ； 2. 中国科学院研究生院，北京 100039 ) 摘要：由安光所自行设计的高精度分光光度计目的是高精度测量滤光片透过率。该系统特点是基 于双光栅单色仪的全自动单光束测量仪器。在出射光路中引入了积分球，用来消除光束的偏振性 和不均匀性，而且在信号接收部分提出了将滤光片和探测器作为整体考虑，优点是接近滤光片的 实际使用环境，减少了其实际测量误差。着重叙述了该仪器的设计过程和不确定度分析。测量的 不确定度源包括光源的稳定性，双单色仪重复性、再现性，光束的均匀性，内反射，探测器线性、 稳定性、偏振性、均匀性，系统杂散光。经本仪器测量的滤光片透过率合成不确定度为 5.859×10-3 ， 完全满足测量精度要求。 关键词：分光光度计；双单色仪；透射率测量；滤光片；积分球 中图分类号：TH744 文献标识码：A High-accuracy spectrometer for measurement of spectral transmissivity ZHOU Lei1, 2 ，ZHENG Xiao-bing1 ( 1. Anhui Institute of Optics and Mechanics , the Chinese Academy of Sciences, Hefei 230031, China ) 2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China ) Abstract : High-accuracy spectrometer had been developed for the high-accuracy measurement of spectral transmissivity of filter. This system is an automated and single-beam instrument based on a double grating monochromator. An integrating sphere was introduced to the output optical path in order to eliminate non-uniform and polarization of the light beam, and the filter and detector were regarded as an unity in the signal receiving part to approach the real condition of the use of filter and to eliminate measurement errors. The apparatus design and uncertainty analysis are described. The uncertainties include stability of li