Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Bai, Yang, Li, Jianlin, Zha, Rongwei, Wang, Ying, Lei, Guangzhi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
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
_version_ 1783599145401974784
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
work_keys_str_mv AT baiyang catadioptricopticalsystemdesignof15magnitudestarsensorwithlargeentrancepupildiameter
AT lijianlin catadioptricopticalsystemdesignof15magnitudestarsensorwithlargeentrancepupildiameter
AT zharongwei catadioptricopticalsystemdesignof15magnitudestarsensorwithlargeentrancepupildiameter
AT wangying catadioptricopticalsystemdesignof15magnitudestarsensorwithlargeentrancepupildiameter
AT leiguangzhi catadioptricopticalsystemdesignof15magnitudestarsensorwithlargeentrancepupildiameter