Imaging spectroscopy system design of Schwarzschild structure based on the planar grating

Yanru Chen; Xuchong Guo; Xiaohao Wang; Kai Ni; Qian Zhou

doi:10.1117/12.2616441

22 July 2022 Imaging spectroscopy system design of Schwarzschild structure based on the planar grating

Yanru Chen, Xuchong Guo, Xiaohao Wang, Kai Ni, Qian Zhou

Proceedings Volume 12277, 2021 International Conference on Optical Instruments and Technology: Optical Systems, Optoelectronic Instruments, Novel Display, and Imaging Technology; 122770X (2022) https://doi.org/10.1117/12.2616441
Event: 2021 International Conference on Optical Instruments and Technology, 2022, Online Only

Abstract

The research and development of miniaturized and stable hyperspectral imaging spectrometer has far-reaching significance. In this study, it is designed with grating as the spectroscopic element, in order to reduce the volume of the instrument without sacrificing spectral imaging performance. Comparing the advantages and disadvantages of the spectral spectroscopy structures of three different structures, the imaging spectrometer is designed with improved Schwarzchild "M"-type optical path structure with the planar grating. On the basis of good correction image difference, the process of processing is simplified while the target of high resolution, large aperture and wide band is reached. The MTFs of the optical system of visible optical channel reached 0.7, and the main wavelength distortion was about 0.01%, and relative aperture of is 1/2.5. Using ZEMAX optical design software, the optical elements are designed independently for four typical bands (one visible light band and three infrared bands) and the aberration is corrected, and the light trace and optimization are carried out on each channel, so that continuous imaging detection of wide band multi-channel hyperspectral can be achieved in a small volume.

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Yanru Chen, Xuchong Guo, Xiaohao Wang, Kai Ni, and Qian Zhou "Imaging spectroscopy system design of Schwarzschild structure based on the planar grating ", Proc. SPIE 12277, 2021 International Conference on Optical Instruments and Technology: Optical Systems, Optoelectronic Instruments, Novel Display, and Imaging Technology, 122770X (22 July 2022); https://doi.org/10.1117/12.2616441

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KEYWORDS

Monochromatic aberrations

Optical design

Spherical lenses

Imaging spectroscopy

Imaging systems

Visible radiation

Geometrical optics

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