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Fery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240～2400nm；光谱带宽在350、600、1000nm处分别小于3、9、29nm。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垂50mm范围内小于1．9％，在西30mm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。
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 F6ry 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 q）50 mm or 1.4% within φ30nm; 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.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2014年第5期244-249,共6页
Chinese Journal of Lasers
基金
国家自然科学基金(41105014)
中科院碳专题(XDA05040103)
关键词
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
