Dual-Gratings Imaging Spectrometer

Common dispersive-type spectroscopic instruments include prism-type and grating-type, usually using a single dispersive element. The continuous imaging band is always limited by the dispersion angle. When it is necessary to image two wavebands with an ultra-spectral resolution that are far apart, th...

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Autores principales:	Rui Ouyang, Duo Wang, Longxu Jin, Xingxiang Zhang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	spectrometer spectral range double gratings Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/c3a0045880e04906afce21e336454cb1
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id	oai:doaj.org-article:c3a0045880e04906afce21e336454cb1
record_format	dspace
spelling	oai:doaj.org-article:c3a0045880e04906afce21e336454cb12021-11-25T16:43:20ZDual-Gratings Imaging Spectrometer10.3390/app1122110482076-3417https://doaj.org/article/c3a0045880e04906afce21e336454cb12021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/11048https://doaj.org/toc/2076-3417Common dispersive-type spectroscopic instruments include prism-type and grating-type, usually using a single dispersive element. The continuous imaging band is always limited by the dispersion angle. When it is necessary to image two wavebands with an ultra-spectral resolution that are far apart, the imaging is difficult due to the large diffraction angle. To broaden the spectral coverage of the imaging spectrometer, in this paper, we propose a dual-gratings imaging spectrometer with two independently rotating gratings. In this proposed system, two very far apart wavelength bands can be imaged in the adjacent areas by adjusting the angle of the dual gratings. This greatly expands the spectral coverage of the imaging spectrometer. Currently, the only application area considered for this instrument is solar applications. In this article, we present the optical system of the dual-gratings imaging spectrometer, illustrate several advantages of the new structure, and discuss new problems caused by the dual-gratings, which are referred to as overlap between two spectra and double image offset. We deduced the calculation process of the dual grating rotation angle, the relationship between the final acquired image and the slit, the relationship between the angle change between the dual gratings and the double image offset, and the relationship between the MTF upper limit reduction and the spatial frequency. This article also summarizes the shortcomings of this structure and studies the applicable fields under these shortcomings. At last, we simulate a dual-gratings imaging spectrometer system, compare this scheme with two traditional schemes, and conclude that this instrument has certain practical significance.Rui OuyangDuo WangLongxu JinXingxiang ZhangMDPI AGarticlespectrometerspectral rangedouble gratingsTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 11048, p 11048 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	spectrometer spectral range double gratings Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	spectrometer spectral range double gratings Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Rui Ouyang Duo Wang Longxu Jin Xingxiang Zhang Dual-Gratings Imaging Spectrometer
description	Common dispersive-type spectroscopic instruments include prism-type and grating-type, usually using a single dispersive element. The continuous imaging band is always limited by the dispersion angle. When it is necessary to image two wavebands with an ultra-spectral resolution that are far apart, the imaging is difficult due to the large diffraction angle. To broaden the spectral coverage of the imaging spectrometer, in this paper, we propose a dual-gratings imaging spectrometer with two independently rotating gratings. In this proposed system, two very far apart wavelength bands can be imaged in the adjacent areas by adjusting the angle of the dual gratings. This greatly expands the spectral coverage of the imaging spectrometer. Currently, the only application area considered for this instrument is solar applications. In this article, we present the optical system of the dual-gratings imaging spectrometer, illustrate several advantages of the new structure, and discuss new problems caused by the dual-gratings, which are referred to as overlap between two spectra and double image offset. We deduced the calculation process of the dual grating rotation angle, the relationship between the final acquired image and the slit, the relationship between the angle change between the dual gratings and the double image offset, and the relationship between the MTF upper limit reduction and the spatial frequency. This article also summarizes the shortcomings of this structure and studies the applicable fields under these shortcomings. At last, we simulate a dual-gratings imaging spectrometer system, compare this scheme with two traditional schemes, and conclude that this instrument has certain practical significance.
format	article
author	Rui Ouyang Duo Wang Longxu Jin Xingxiang Zhang
author_facet	Rui Ouyang Duo Wang Longxu Jin Xingxiang Zhang
author_sort	Rui Ouyang
title	Dual-Gratings Imaging Spectrometer
title_short	Dual-Gratings Imaging Spectrometer
title_full	Dual-Gratings Imaging Spectrometer
title_fullStr	Dual-Gratings Imaging Spectrometer
title_full_unstemmed	Dual-Gratings Imaging Spectrometer
title_sort	dual-gratings imaging spectrometer
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c3a0045880e04906afce21e336454cb1
work_keys_str_mv	AT ruiouyang dualgratingsimagingspectrometer AT duowang dualgratingsimagingspectrometer AT longxujin dualgratingsimagingspectrometer AT xingxiangzhang dualgratingsimagingspectrometer
_version_	1718413041775673344

Dual-Gratings Imaging Spectrometer

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