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Catadioptric Optical System Design of 15-Magnitude Star Sensor with Large Entrance Pupil Diameter
The optical system is one of the core components for star sensors, whose imaging quality directly influences the performance of star sensors for star detection, thereby determining the attitude control accuracy of spacecrafts. Here, we report a new type of optical system with a catadioptric structur...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7582241/ https://www.ncbi.nlm.nih.gov/pubmed/32992859 http://dx.doi.org/10.3390/s20195501 |
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author | Bai, Yang Li, Jianlin Zha, Rongwei Wang, Ying Lei, Guangzhi |
author_facet | Bai, Yang Li, Jianlin Zha, Rongwei Wang, Ying Lei, Guangzhi |
author_sort | Bai, Yang |
collection | PubMed |
description | The optical system is one of the core components for star sensors, whose imaging quality directly influences the performance of star sensors for star detection, thereby determining the attitude control accuracy of spacecrafts. Here, we report a new type of optical system with a catadioptric structure and a large entrance pupil diameter for a 15-magnitude star sensor. It consists of an improved Cassegrain system (R-C system), an aperture correction spherical lens group and a field of view correction spherical lens group. By embedding the secondary mirror of the R-C system into the output surface of the negative spherical lens of the aperture correction spherical lens group, the blocking of incident light is eliminated from the secondary mirror holder. After the structure optimization, the catadioptric optical system (COS) had a spectral range of 450 nm–950 nm, an entrance pupil diameter of 250 mm, a half-diagonal field of view of 1.4° and a focal length of 390 mm. By using theoretical calculations and experimental measurements, it was verified that the COS, with the ability to correct astigmatism, lateral color and distortion, can fulfill the detection of 15-magnitude dark stars. |
format | Online Article Text |
id | pubmed-7582241 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-75822412020-10-28 Catadioptric Optical System Design of 15-Magnitude Star Sensor with Large Entrance Pupil Diameter Bai, Yang Li, Jianlin Zha, Rongwei Wang, Ying Lei, Guangzhi Sensors (Basel) Article The optical system is one of the core components for star sensors, whose imaging quality directly influences the performance of star sensors for star detection, thereby determining the attitude control accuracy of spacecrafts. Here, we report a new type of optical system with a catadioptric structure and a large entrance pupil diameter for a 15-magnitude star sensor. It consists of an improved Cassegrain system (R-C system), an aperture correction spherical lens group and a field of view correction spherical lens group. By embedding the secondary mirror of the R-C system into the output surface of the negative spherical lens of the aperture correction spherical lens group, the blocking of incident light is eliminated from the secondary mirror holder. After the structure optimization, the catadioptric optical system (COS) had a spectral range of 450 nm–950 nm, an entrance pupil diameter of 250 mm, a half-diagonal field of view of 1.4° and a focal length of 390 mm. By using theoretical calculations and experimental measurements, it was verified that the COS, with the ability to correct astigmatism, lateral color and distortion, can fulfill the detection of 15-magnitude dark stars. MDPI 2020-09-25 /pmc/articles/PMC7582241/ /pubmed/32992859 http://dx.doi.org/10.3390/s20195501 Text en © 2020 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Bai, Yang Li, Jianlin Zha, Rongwei Wang, Ying Lei, Guangzhi Catadioptric Optical System Design of 15-Magnitude Star Sensor with Large Entrance Pupil Diameter |
title | Catadioptric Optical System Design of 15-Magnitude Star Sensor with Large Entrance Pupil Diameter |
title_full | Catadioptric Optical System Design of 15-Magnitude Star Sensor with Large Entrance Pupil Diameter |
title_fullStr | Catadioptric Optical System Design of 15-Magnitude Star Sensor with Large Entrance Pupil Diameter |
title_full_unstemmed | Catadioptric Optical System Design of 15-Magnitude Star Sensor with Large Entrance Pupil Diameter |
title_short | Catadioptric Optical System Design of 15-Magnitude Star Sensor with Large Entrance Pupil Diameter |
title_sort | catadioptric optical system design of 15-magnitude star sensor with large entrance pupil diameter |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7582241/ https://www.ncbi.nlm.nih.gov/pubmed/32992859 http://dx.doi.org/10.3390/s20195501 |
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