Geostationary Full-Spectrum Wide-Swath High-Fidelity Imaging Spectrometer: Optical Design and Prototype Development

Zhu, Jian Feng; Zhao, Zhicheng; Liu, Quan; Xinhua, Chen; Li, Huan; Tang, Shaofan; Shen, Weimin

doi:10.3390/rs15020396

Cited by 5 publications

(1 citation statement)

References 46 publications

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“…The spacing between split slits should not be too short to avoid the occurrence of overlapping dispersion spectra of different channels. The structure of a traditional telescope system without a pupil-separation prism is illustrated in Figure 8, where the slit continuously contains only one channel [41]. If one aims to achieve ultra-high spectral resolution detection in the 180~400 nm range with 0.15 nm resolution, there is an issue where the imaged spectrum exceeds the effective working area of the detector after dispersion through the spectral imaging system.…”

Section: Pupil Separation Prism Designmentioning

confidence: 99%

Multi-Channel Hyperspectral Imaging Spectrometer Design for Ultraviolet Detection in the Atmosphere of Venus

Zhang,

Fang,

et al. 2024

Remote Sensing

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The spectroscopic detection of SO2 and unknown UV absorber substance in the H2SO4 cloud layer of Venus’ atmosphere is currently a focal point in the study of the habitability of Venusian atmospheric clouds. This paper addresses the simultaneous detection requirements of multiple substances in the ultraviolet range of Venus’ atmosphere and proposes a multi-channel hyperspectral imaging system design using pupil separation prisms and grating multilevel spectra. The system achieves a multi-channel design by splitting the entrance pupil of the telescope using prisms. Spectra from different channels are diffracted to the same detector through different orders of the grating. The system features a single spectrometer and detector, enabling simultaneous detection of spectra from different channels. It also boasts advantages such as compact size, ultra-high spectral resolution, and simultaneous multi-channel detection. The system design results indicate that within the working spectral range of three channels, the spectral resolution is better than 0.15 nm, surpassing previous in-orbit or current in-orbit planetary atmospheric detection spectrometers. With a Nyquist frequency of 56 lp/mm, the full-field MTF exceeds 0.7. The system’s smile is less than 0.05 μm, and the keystone is less than 0.04 μm, meeting the requirements for imaging quality.

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Section: Pupil Separation Prism Designmentioning

confidence: 99%

Multi-Channel Hyperspectral Imaging Spectrometer Design for Ultraviolet Detection in the Atmosphere of Venus

Zhang,

Fang,

et al. 2024

Remote Sensing

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Optical design and fabrication of a common-aperture multispectral imaging system for integrated deep space navigation and detection

Cao

Chang

Huang

et al. 2023

Optics and Lasers in Engineering

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Design of a compact wide-band triple grating imaging spectrometer based on freeform surfaces

Chen,

Wang,

Huo

et al. 2024

Appl. Opt.

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Wide-band, high spectral resolution, and miniaturized imaging spectrometers have important applications. However, the working band, spectral resolution, and volume of the imaging spectrometers are mutually restricted. To solve this problem, we proposed a method in which multiple working bands share the same optical components except gratings, and the working bands switch with the switching of the working gratings. Based on the freeform surfaces characterized by XY polynomials, we designed a compact wide-band triple grating imaging spectrometer through the design ideas of human-computer interaction and iterative optimization. The imaging spectrometer works in the wavelength band of 200nm∼1600nm, covering ultraviolet (UV), visible, and near-infrared light, and it has a compact optical path volume of 24mm×38mm×80mm. Three gratings with 0.0025 mm, 0.005 mm, and 0.01 mm line spacing are used to realize dispersion with high diffraction efficiency in the bands of 200nm∼400nm, 400nm∼800nm, and 800nm∼1600nm, respectively. The UV detector receives imaging light in the UV band (200nm∼400nm), and the visible near-infrared (VNIR) detector receives imaging light in the visible and near-infrared bands (400nm∼1600nm). The design results show that the spectral resolutions of the three bands are 0.4 nm, 0.8 nm, and 1.6 nm, and the spectral smile and keystone distortion are less than 1.4 µm. The design results have engineering application value.

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Geostationary Full-Spectrum Wide-Swath High-Fidelity Imaging Spectrometer: Optical Design and Prototype Development

Cited by 5 publications

References 46 publications

Multi-Channel Hyperspectral Imaging Spectrometer Design for Ultraviolet Detection in the Atmosphere of Venus

Multi-Channel Hyperspectral Imaging Spectrometer Design for Ultraviolet Detection in the Atmosphere of Venus

Optical design and fabrication of a common-aperture multispectral imaging system for integrated deep space navigation and detection

Design of a compact wide-band triple grating imaging spectrometer based on freeform surfaces

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