Design of long-wave infrared imaging spectrometer with eliminating spectral curvature

ZHANG Xiao-long; LIU Ying; SUN Qiang; LI Chun; ZHOU Hao

doi:10.3788/OPE.20142202.0266

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Design of long-wave infrared imaging spectrometer with eliminating spectral curvature

Modern Applied Optics | 更新时间：2020-08-13

- Design of long-wave infrared imaging spectrometer with eliminating spectral curvature
- Optics and Precision Engineering Vol. 22, Issue 2, Pages: 266-273(2014)
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
  2. 中国科学院大学北京,中国,100049
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20142202.0266
  CLC： TH744.1
- Received：11 April 2013，
  
  Published：20 February 2014
- 稿件说明：
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张晓龙,刘英,孙强等. 消谱线弯曲长波红外成像光谱仪设计[J]. 光学精密工程, 2014,22(2): 266-273

ZHANG Xiao-long, LIU Ying, SUN Qiang etc. Design of long-wave infrared imaging spectrometer with eliminating spectral curvature[J]. Editorial Office of Optics and Precision Engineering, 2014,22(2): 266-273
张晓龙,刘英,孙强等. 消谱线弯曲长波红外成像光谱仪设计[J]. 光学精密工程, 2014,22(2): 266-273 DOI： 10.3788/OPE.20142202.0266.

ZHANG Xiao-long, LIU Ying, SUN Qiang etc. Design of long-wave infrared imaging spectrometer with eliminating spectral curvature[J]. Editorial Office of Optics and Precision Engineering, 2014,22(2): 266-273 DOI： 10.3788/OPE.20142202.0266.

摘要

为了实现遥感目标的长波红外高光谱成像

有效消除平面光栅产生的谱线弯曲

设计了离轴透镜消谱线弯曲长波红外平面光栅成像光谱仪。分别计算了平面光栅和离轴透镜产生的谱线弯曲

分析了谱线弯曲随相关参量的变化关系

并基于此设计了消谱线弯曲的初始结构。通过优化设计得到的光学系统的通光孔径为100 mm

数为2

光谱分辨率为20 nm

空间分辨率为150 μrad

冷光阑效率为100%

成像质量接近衍射极限

系统谱线弯曲由原有的180 μm以上变为14.3 μm以内。该项设计获得了具有普适性的消谱线弯曲公式

证明了离轴透镜具备校正谱线弯曲的特殊功能。最后的设计结果表明

在满足系统成像质量要求且不增加系统复杂度的前提下

采用离轴透镜的平面光栅光谱仪的系统谱线弯曲小于探测器像元尺寸的1/2

满足使用要求。

Abstract

To achieve the long-wave infrared hyperspectral imaging for remote sensing targets and to eliminate the spectral curvature of a plane grating effectively

a long-wave infrared imaging spectrometer with an off-axis lens was designed. The spectral curvatures from the plane grating and a single off-axis lens were calculated

respectively

and the relationships between spectral curvatures and relative parameters were analyzed

then aninitial structure for eliminating spectral curvature was designed. The optical system optimized shows an aperture of 100 mm

number of 2

spectral resolution of 20 nm

spatial resolution of 150 μrad

and a cold aperture efficiency of 100% . Moreover

its image quality is close to the diffraction limit and the spectral curvature of system changes from more than 180 μm to less than 14.3 μm. The design obtains a universal eliminating spectral curvature formula

and proves that the off-axis lens has the function to eliminate spectral curvature. It concludes that the imaging spectrometer of plane grating using off-axis lens can offer a spectral curvature less than half the pixel size of the detector without increasing the system complexity

which meets the use request on the premise of satisfying imaging quality.

关键词

Keywords

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Related Institution

中国科学院长春光学精密机械与物理研究所

State Key Laboratory of Applied Optics,Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033,China

Graduate University of Chinese Academy of Sciences, Beijing 100039, China

School of Health Science and Engineering，University of Shanghai for Science and Technology

School of Optical-Eletrical and Computer Engineering，University of Shanghai for Science and Technology

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