紧凑型消像散长狭缝光谱仪光学系统
投稿时间:2018-12-15  修订日期:2019-01-03  点此下载全文
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作者单位E-mail
朱嘉诚 苏州大学 13962250185@163.com 
沈为民 苏州大学  
基金项目:国家重点研发计划(2016YFB0500501-02)
中文摘要:为提高高光谱遥感仪器的幅宽和减小其体积,重点研究适用于宽幅高光谱遥感应用的长狭缝、紧凑型Wynne-Offner光谱仪。通过追迹主光线,导出像散表达式,分析Offner装架和Wynne-Offner光装架的像散特性。指出Wynne-Offner装架的消像散圆域大于Offner装架的消像散圆环域,前者更适用于长狭缝。给出两个光谱仪实例,狭缝长度均为70mm,分别工作于0.5-1.0μm和1.0-2.5μm波长范围,成像质量接近于衍射极限,光谱畸变可忽略,具备狭缝长、结构紧凑、像质优的特点,适用于宽幅高光谱遥感应用。
中文关键词:高光谱遥感  Wynne-Offner光谱仪  长狭缝  消像散
 
Compact anastigmatic long-slit spectrometer
Abstract:In order to increase the swath width and reduce the volume of hyperspectral remote sensing instruments, the compact, long-slit Wynne-Offner spectrometers suitable for wide swath width were detailedly studied. By tracing the chief ray, expressions of the astigmatism were deduced, and the astigmatism of the Offner configuration and the Wynne-Offner configuration were analyzed. It was pointed out that the anastigmatic circle domain of the Wynne-Offner configuration is larger than that of the Offner configuration, and the former was more suitable for long slit. Two examples of spectrometers were given. Length of their slits are both 70mm, and they worked in the wavelength range of 0.5-1.0μm and 1.0-2.5μm respectively. The imaging quality was close to the diffraction limit, and the spectral distortion was negligible. Such Wynne-Offner spectrometers have the advantages of long slit, compact structure and high imaging quality, and it is really suitable for the remote sensing applications with wide swath width.
keywords:hyperspectral remote sensing, Wynne-Offner spectrometer, long slit, anastigmatic
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