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Optical Design of Imaging Spectrometer Based on Linear Variable Filter for Nighttime Light Remote Sensing

Nighttime light remote sensing has unique advantages on reflecting human activities, and thus has been used in many fields including estimating population and GDP, analyzing light pollution and monitoring disasters and conflict. However, the existing nighttime light remote sensors have many limitati...

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Autores principales: Xie, Yunqiang, Liu, Chunyu, Liu, Shuai, Fan, Xinghao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8271715/
https://www.ncbi.nlm.nih.gov/pubmed/34202575
http://dx.doi.org/10.3390/s21134313
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author Xie, Yunqiang
Liu, Chunyu
Liu, Shuai
Fan, Xinghao
author_facet Xie, Yunqiang
Liu, Chunyu
Liu, Shuai
Fan, Xinghao
author_sort Xie, Yunqiang
collection PubMed
description Nighttime light remote sensing has unique advantages on reflecting human activities, and thus has been used in many fields including estimating population and GDP, analyzing light pollution and monitoring disasters and conflict. However, the existing nighttime light remote sensors have many limitations because they are subject to one or more shortcomings such as coarse spatial resolution, restricted swath width and lack of multi-spectral data. Therefore, we propose an optical system of imaging spectrometer based on linear variable filter. The imaging principle, optical specifications, optical design, imaging performance analysis and tolerance analysis are illustrated. The optical system with a focal length of 100 mm, F-number 4 and 43° field of view in the spectrum range of 400–1000 nm is presented, and excellent image quality is achieved. The system can obtain the multi-spectral images of eight bands with a spatial resolution of 21.5 m and a swath width of 320 km at the altitude of 500 km. Compared with the existing nighttime light remote sensors, our system possesses the advantages of high spatial and high spectral resolution, wide spectrum band and wide swath width simultaneously, greatly making up for the shortage of the present systems. The result of tolerance analysis shows our system satisfy the requirements of fabrication and alignment.
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spelling pubmed-82717152021-07-11 Optical Design of Imaging Spectrometer Based on Linear Variable Filter for Nighttime Light Remote Sensing Xie, Yunqiang Liu, Chunyu Liu, Shuai Fan, Xinghao Sensors (Basel) Communication Nighttime light remote sensing has unique advantages on reflecting human activities, and thus has been used in many fields including estimating population and GDP, analyzing light pollution and monitoring disasters and conflict. However, the existing nighttime light remote sensors have many limitations because they are subject to one or more shortcomings such as coarse spatial resolution, restricted swath width and lack of multi-spectral data. Therefore, we propose an optical system of imaging spectrometer based on linear variable filter. The imaging principle, optical specifications, optical design, imaging performance analysis and tolerance analysis are illustrated. The optical system with a focal length of 100 mm, F-number 4 and 43° field of view in the spectrum range of 400–1000 nm is presented, and excellent image quality is achieved. The system can obtain the multi-spectral images of eight bands with a spatial resolution of 21.5 m and a swath width of 320 km at the altitude of 500 km. Compared with the existing nighttime light remote sensors, our system possesses the advantages of high spatial and high spectral resolution, wide spectrum band and wide swath width simultaneously, greatly making up for the shortage of the present systems. The result of tolerance analysis shows our system satisfy the requirements of fabrication and alignment. MDPI 2021-06-24 /pmc/articles/PMC8271715/ /pubmed/34202575 http://dx.doi.org/10.3390/s21134313 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Communication
Xie, Yunqiang
Liu, Chunyu
Liu, Shuai
Fan, Xinghao
Optical Design of Imaging Spectrometer Based on Linear Variable Filter for Nighttime Light Remote Sensing
title Optical Design of Imaging Spectrometer Based on Linear Variable Filter for Nighttime Light Remote Sensing
title_full Optical Design of Imaging Spectrometer Based on Linear Variable Filter for Nighttime Light Remote Sensing
title_fullStr Optical Design of Imaging Spectrometer Based on Linear Variable Filter for Nighttime Light Remote Sensing
title_full_unstemmed Optical Design of Imaging Spectrometer Based on Linear Variable Filter for Nighttime Light Remote Sensing
title_short Optical Design of Imaging Spectrometer Based on Linear Variable Filter for Nighttime Light Remote Sensing
title_sort optical design of imaging spectrometer based on linear variable filter for nighttime light remote sensing
topic Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8271715/
https://www.ncbi.nlm.nih.gov/pubmed/34202575
http://dx.doi.org/10.3390/s21134313
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