Optical design of Schwarzschild imaging spectrometer with freeform surfaces

Liu, Xingwei; Zhou, Jinsong; Wei, Lidong; Feng, Lei; Jing, Juanjuan; He, Xiaoying; Yang, Lei; Li, Yacan

doi:10.1016/j.optcom.2020.126495

Cited by 14 publications

(3 citation statements)

References 19 publications

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“…The results of tolerance allocation are shown in Table 4. MTF is utilized as the evaluation criterion for the optical system's performance throughout the tolerance analysis process, and sensitivity analysis is conducted for all tolerance allocations [51]. Figures 23-25 illustrate the tolerance analysis results for longwave and shortwave in different channels.…”

Section: Tolerance Analysismentioning

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: Tolerance Analysismentioning

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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“…As an important optical element, diffraction grating has the properties of dispersion [1][2][3][4][5][6], beam splitting [7][8][9][10][11], polarization [12][13][14][15][16][17] and phase matching [18][19][20][21][22] and shows a wide range of applications in different fields. For example, diffraction gratings with high dispersion and high diffraction efficiency, such as the core components in laser pulse compression [23], laser frequency selection [24] and spectral beam combining [25] are widely used in high-power laser systems.…”

Section: Introductionmentioning

confidence: 99%

Modeling and analysis of bi-function separation under second Bragg incidence by T-type microstructure

Fu¹,

Wang²

2021

Laser Phys.

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A one-port reflector for transverse-electric (TE) polarization and a two-port beam splitter for transverse-magnetic (TM) polarization is proposed by T-type double-layer fused-silica grating. After optimization calculations, 97.87% single-order high-efficiency reflection under TE polarization and 48.70%/48.71% highly uniform dual-order beam splitting under TM polarization are finally obtained. In addition, the normalized electric field and magnetic field diagrams of the grating are obtained using the finite element method. Finally, the incident characteristics and process tolerances of the grating are analyzed, and a range of structural parameters that meets good reflection efficiency is found. The design and study of polarization-dependent gratings carried out in this paper are of great significance for increasing the output power of laser systems and improving the stability of optical devices when unpolarized lasers are incident.

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“…His design operates in 400-1000 nm waveband with an F-number of 2.5 and a slit length of 13 mm. Liu [6] used freeform surfaces to balance the astigmatism aberration and compactable optical system. It has an F-number of 2, a slit length of 32mm, and the optical system volume is only 230mmX220mmX200mm.…”

mentioning

confidence: 99%

Design of a compact 400-1700 nm imaging spectrometer with aberration correction grating

Xing¹,

Li²,

Ji³

et al. 2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

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Optical design of Schwarzschild imaging spectrometer with freeform surfaces

Cited by 14 publications

References 19 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

Modeling and analysis of bi-function separation under second Bragg incidence by T-type microstructure

Design of a compact 400-1700 nm imaging spectrometer with aberration correction grating

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