漫反射参照体双向反射比因子绝对测量研究

大气与环境光学学报 ›› 2010, Vol. 5 ›› Issue (5): 366-372.

漫反射参照体双向反射比因子绝对测量研究

陈洪耀, 张黎明, 杨本永, 徐伟伟

（中国科学院安徽光学精密机械研究所中国科学院通用光学定标与表征技术重点实验室，安徽合肥 230031）

收稿日期:2010-03-31 修回日期:2010-04-08 出版日期:2010-09-28 发布日期:2010-09-14
通讯作者: 陈洪耀（1980－），男，河南漯河人，博士，助理研究员，主要从事高光谱传感器的光谱与辐射定标和漫反射标准绝对测量方面的研究. E-mail:hyaochen@mail.ustc.edu.cn
作者简介:陈洪耀（1980－），男，河南漯河人，博士，助理研究员，主要从事高光谱传感器的光谱与辐射定标和漫反射标准绝对测量方面的研究.

Absolute Bidirectional Reflectance Factor Measurement for Diffuse Reflection Standard

CHEN Hong-yao, ZHANG Li-ming, YANG Ben-yong, XU Wei-wei

(Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China)

Received:2010-03-31 Revised:2010-04-08 Published:2010-09-28 Online:2010-09-14

摘要/Abstract

摘要：

为提高漫反射参照体双向反射比因子（BRF）测量准确度，设计了漫反射参照体BRF绝对测量系统。该系统以积分球辐射源为照明光源，高精度陷阱(Trap)辐亮度计为探测器，通过对积分球辐射源辐亮度、漫反射参照体反射辐亮度和几何因子的测量，实现了漫反射参照体BRF绝对测量。结果分析表明，测量不确定度优于1％（k=2），通过对630 nm波长下漫反射参照体BRF数值积分得到的方向－半球反射比因子（DHRF）比朔源到中国计量科学研究院的采用积分球方法得到的DHRF高0.57％，差别在二者测量不确定度范围之内，进而验证了BRF绝对测量的准确性。

关键词: 漫反射, 双向反射比因子, 辐射定标, 反射率, 定量遥感

Abstract:

A gonioreflectometer which concentrated on absolute measurement of diffuse reflection standards’ bidirectional reflectance factor (BRF) is described. The instrument employs a specially built integrating sphere as a light source and a mechanically simple, radiometrically stable filter trap radiometer as detector. Analysis of its initial performance in 630 nm shows that the combined standard uncertainty of the measurement is 0.87 % (k=2). The hemispherical reflectance factor is obtained through integration of BRF measurement results, and it is 0.57％ higher than the results scaled in National Institute of Metrology (NIM) using integrating sphere method. The difference is within the uncertainty of the two measurements, and it can validate the accuracy of absolute measurement.

Key words: diffuse reflectance, bidirectional reflectance factor, radiometric calibration, reflectance, quantitative remote sensing

中图分类号:

O432
TB303

陈洪耀张黎明杨本永徐伟伟. 漫反射参照体双向反射比因子绝对测量研究[J]. 大气与环境光学学报, 2010, 5(5): 366-372.

CHEN Hong-Yao, ZHANG Li-Ming, YANG Ben-Yong, XU Wei-Wei. Absolute Bidirectional Reflectance Factor Measurement for Diffuse Reflection Standard[J]. Journal of Atmospheric and Environmental Optics, 2010, 5(5): 366-372.

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