Design on hyper-spectral imaging system with harmonic diffraction element in medium and long infrared

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Design on hyper-spectral imaging system with harmonic diffraction element in medium and long infrared

Article | 更新时间：2020-08-13

- Design on hyper-spectral imaging system with harmonic diffraction element in medium and long infrared
- Optics and Precision Engineering Vol. 18, Issue 3, Pages: 579-585(2010)
- 作者机构：
  
  长春光学精密机械与物理研究所应用光学国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：02 March 2009，
  
  Revised：04 May 2009，
  
  Published Online：22 March 2010，
  
  Published：22 March 2010
- 稿件说明：
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刘英. 谐衍射中、长波红外超光谱成像系统设计[J]. 光学精密工程, 2010,18(3):579-585

Design on hyper-spectral imaging system with harmonic diffraction element in medium and long infrared[J]. Optics and precision engineering, 2010, 18(3): 579-585.
刘英. 谐衍射中、长波红外超光谱成像系统设计[J]. 光学精密工程, 2010,18(3):579-585 DOI：

Design on hyper-spectral imaging system with harmonic diffraction element in medium and long infrared[J]. Optics and precision engineering, 2010, 18(3): 579-585. DOI：

摘要

目的：为了获取足够的目标信息，充分利用中波红外和长波红的光谱信息，建立了谐衍射中、长波红外超光谱成像系统。方法：文中利用谐衍射元件独特的色散性质，将谐衍射透镜应用于中、长波红外超光谱成像系统中，使系统在中波红外3.7-4.8m

长波红外18.5-12m的2个谐振波段内获取二百多个不同波长的图像信息。结果：设计结果表明：中波红外波段，在18对线/mm处，光学调制传递函数大于0.53；长波红外波段，在13对线/mm处，光学调制传递函数大于0.51；光学系统的点斑均方根直径，在中波红外波段小于30m，在长波红外波段小于37m。结论：光学调制传递函数在各个波长处均接近衍射极限；点斑的均方根直径完全可以与国内现有探测器的像元尺寸匹配。

Abstract

Objective: In order to get enough information

make the best of the spectral information of medium and long infrared

this article establishes a harmonic diffractive / refractive optical system in middle and long infrared. Method: In this paper

the hyper-spectral imaging system in medium and long infrared has obtained more than 200 spectral images

during medium-wave infrared band 3.7-4.8m and long-wave infrared band 8.5-12m

based on the special large dispersion capability of harmonic diffractive element. Result: The design results show that the design: at 18 lines/mm

the optical modulation transfer function is greater than 0.53 in medium-wave infrared band; at 13 lines/mm the optical modulation transfer is greater than 0.51 in long-wave infrared band; the RMS spot diameter is less than 30 in medium-wave infrared band and less than 37 in long-wave infrared band. Conclusion: The optical modulation transfer function at all wavelengths are close to the diffraction limit; and point of the RMS spot diameter can match with the existing detector pixel size.

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