中国激光, 2014, 41 (5): 0514002, 网络出版: 2014-04-09
新型宽波段单色输出绝对光谱辐照源
New Absolute Spectral Irradiance Source with Wide Band and Monochromatic Light Outputing
光谱学 辐照源 色散相减 均匀度 偏振度 spectroscopy radiation source dispersion subtraction uniformity degree of polarization
摘要
随着光学遥感技术的发展,光谱辐射定标受到越来越多的关注。积分球渐渐成为紫外和可见波段辐射定标的主要工具,然而积分球存在无法输出单色光、稳定性不够持久等问题。为解决上述问题,提出一种基于双Féry棱镜色散相减结构的光谱辐照源的设计方法。该新型光谱辐照源的光谱范围为240~2400 nm;光谱带宽在350、600、1000 nm处分别小于3、9、29 nm。经过光学设计软件Zemax设计和仿真,新型光谱辐照源的均匀度在Ф50 mm范围内小于1.9%,在Ф30 mm范围内小于1.4%,并且其系统偏振度小于0.7%。该辐照源可以用来测量探测器和光谱遥感仪器的光谱响应和几何定标。辐照源与起偏器连用可以测量仪器的偏振响应,具有广泛的实用。
Abstract
With the development of optical remote sensing technology, spectral radiometric calibration got more and more attention. Currently, the integrating sphere is the main tool to make radiometric calibration in ultraviolet and visible band. However, the integrating sphere cannot output the monochromatic light, and the stability of the output is not enough. In order to solve these problems, we propose a new method of absolute spectral irradiance source based on double Féry subtraction structure. With the design and simulation of Zemax, the spectral range of the new spectral irradiance source is 240~2400 nm; and the spectral bandwidth at 350, 600, 1000 nm are less than 3, 9, 29 nm respectively; the uniformity of the output is less than 1.9% within Ф50 mm or 1.4% within Ф30 mm; the degree of the polarization is less than 0.7% in full aperture. The new irradiance source can be used to measure the spectral response and geometric calibration of the detector or remote sensing instrument in a wide range of spectra. The new radiation source used with polarizers can be used to measure the polarization response of instruments. Which has a wide range of applications.
张子辉, 王淑荣, 黄煜. 新型宽波段单色输出绝对光谱辐照源[J]. 中国激光, 2014, 41(5): 0514002. Zhang Zihui, Wang Shurong, Huang Yu. New Absolute Spectral Irradiance Source with Wide Band and Monochromatic Light Outputing[J]. Chinese Journal of Lasers, 2014, 41(5): 0514002.