| Related citation: | Jiayin Sun,Ying Liu,Qiang Sun,Chun Li,Jian Wang,Yang Jiang.Performance Comparison of Long-Wave Infrared Imaging Spectrometer Between Dyson Form and Offner Form[J].Journal of Harbin Institute Of Technology(New Series),2017,24(2):45-50.DOI:10.11916/j.issn.1005-9113.15282. |
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| Author Name | Affiliation | | Jiayin Sun | Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Jilin 130033,China
University of Chinese Academy of Sciences, Beijing 100049,China | | Ying Liu | Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Jilin 130033,China | | Qiang Sun | Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Jilin 130033,China | | Chun Li | Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Jilin 130033,China | | Jian Wang | Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Jilin 130033,China | | Yang Jiang | Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Jilin 130033,China |
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| Abstract: |
| In view of the difficulties in traditional long-wave infrared imaging spectrometer which is hard to realize a high signal-to-noise ratio and miniaturization as well under the weak remote sensing signal, Offner convex grating spectrometer and Dyson concave grating spectrometer, both having concentric structure, are designed and analyzed in the band of 8-12 μm. The diffraction angle expressions of the two spectrometers are obtained and the diffraction characteristics are acquired. Both of the spectrometers are designed in Zemax environment under different F-numbers and different grating constants with the same slit, spatial resolution, spectral resolution and detector. The results show that Dyson grating spectrometer possesses the advantages of higher throughput and smaller volume, and Offner grating spectrometer possesses the advantage of more accessible material and the absence of chromatic aberration. The differences between Dyson form and Offner form show that the former is a better choice in the long-wave infrared imaging spectrometer. |
| Key words: long-wave infrared imaging spectrometer grating constant concentric configuration |
| DOI：10.11916/j.issn.1005-9113.15282 |
| Clc Number:O435.1; TN214[KG*2] |
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| Descriptions in Chinese: |
| Dyson型和Offner型长波红外成像光谱仪性能对比 孙佳音1，2，刘英1，孙强1，李淳1，王健1，姜洋1 （1.中国科学院长春光学精密机械与物理研究所；2.中国科学院大学） 创新点说明：（1）推导了两种同心结构光谱仪的衍射角表达式； （2）综合对比了F数和光栅常数对光谱仪成像质量以及体积大小的影响，并得出相应结论。 研究目的： 在长波红外波段，对两种同心结构的光谱仪在光通量、体积大小等方面进行对比，为长波红外成像光谱仪的结构选型提供理论依据。 研究方法： 通过公式推导得到理论依据，然后通过Zemax进行模拟，在不同F数以及光栅常数下对两种同心结构光谱仪进行模拟设计，并在相同的成像区域及分辨率条件下，对比两种结构成像质量、体积大小等性能。 结果： 对比结果显示，Dyson结构可以在较小的F数以及较小的光栅常数下实现理想成像；而Offner结构则需要进行一定的离轴变换和非球面化才能够得到较为理想的像质，且体积较大。 结论： 相对于Offner结构，Dyson型光谱仪更适用于长波红外成像光谱仪的结构选型。 关键词：长波红外；成像光谱仪；光栅常数；同心结构 |
