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Freeform Wide Field-of-View Spaceborne Imaging Telescope: From Design to Demonstrator
Wide field-of-view imaging optics offer a huge potential for space-based Earth observation enabling the capture of global data. Reflective imaging telescopes are often favored, as they do not show chromatic aberrations and are less susceptible to radiation darkening than their refractive counterpart...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9654826/ https://www.ncbi.nlm.nih.gov/pubmed/36365926 http://dx.doi.org/10.3390/s22218233 |
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author | Schifano, Luca Vervaeke, Michael Rosseel, Dries Verbaenen, Jef Thienpont, Hugo Dewitte, Steven Berghmans, Francis Smeesters, Lien |
author_facet | Schifano, Luca Vervaeke, Michael Rosseel, Dries Verbaenen, Jef Thienpont, Hugo Dewitte, Steven Berghmans, Francis Smeesters, Lien |
author_sort | Schifano, Luca |
collection | PubMed |
description | Wide field-of-view imaging optics offer a huge potential for space-based Earth observation enabling the capture of global data. Reflective imaging telescopes are often favored, as they do not show chromatic aberrations and are less susceptible to radiation darkening than their refractive counterparts. However, the main drawback of reflective telescopes is that they are limited with respect to field-of-view while featuring large dimensions. We propose the use of freeform optics to maximize the field of view while maintaining diffraction-limited image quality and minimizing system dimensions. In this paper, we present a novel freeform wide field-of-view reflective telescope, starting from the optical design, and continuing to tolerancing analysis and manufacture, towards a proof-of-concept demonstrator. The novel telescope features a full field-of-view of 120° while showing an exceptional spatial resolution of 2.6 km and fitting within 1 CubeSat unit. To the best of our knowledge, this is the widest field-of-view that has ever been realized for a space-based telescope, nearly reaching Earth observation from limb to limb from an altitude of about 700 km. We hope this design paves the way for future space missions enabling improved Earth observation and leading to enhanced monitoring of climate and climate change. |
format | Online Article Text |
id | pubmed-9654826 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-96548262022-11-15 Freeform Wide Field-of-View Spaceborne Imaging Telescope: From Design to Demonstrator Schifano, Luca Vervaeke, Michael Rosseel, Dries Verbaenen, Jef Thienpont, Hugo Dewitte, Steven Berghmans, Francis Smeesters, Lien Sensors (Basel) Article Wide field-of-view imaging optics offer a huge potential for space-based Earth observation enabling the capture of global data. Reflective imaging telescopes are often favored, as they do not show chromatic aberrations and are less susceptible to radiation darkening than their refractive counterparts. However, the main drawback of reflective telescopes is that they are limited with respect to field-of-view while featuring large dimensions. We propose the use of freeform optics to maximize the field of view while maintaining diffraction-limited image quality and minimizing system dimensions. In this paper, we present a novel freeform wide field-of-view reflective telescope, starting from the optical design, and continuing to tolerancing analysis and manufacture, towards a proof-of-concept demonstrator. The novel telescope features a full field-of-view of 120° while showing an exceptional spatial resolution of 2.6 km and fitting within 1 CubeSat unit. To the best of our knowledge, this is the widest field-of-view that has ever been realized for a space-based telescope, nearly reaching Earth observation from limb to limb from an altitude of about 700 km. We hope this design paves the way for future space missions enabling improved Earth observation and leading to enhanced monitoring of climate and climate change. MDPI 2022-10-27 /pmc/articles/PMC9654826/ /pubmed/36365926 http://dx.doi.org/10.3390/s22218233 Text en © 2022 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 | Article Schifano, Luca Vervaeke, Michael Rosseel, Dries Verbaenen, Jef Thienpont, Hugo Dewitte, Steven Berghmans, Francis Smeesters, Lien Freeform Wide Field-of-View Spaceborne Imaging Telescope: From Design to Demonstrator |
title | Freeform Wide Field-of-View Spaceborne Imaging Telescope: From Design to Demonstrator |
title_full | Freeform Wide Field-of-View Spaceborne Imaging Telescope: From Design to Demonstrator |
title_fullStr | Freeform Wide Field-of-View Spaceborne Imaging Telescope: From Design to Demonstrator |
title_full_unstemmed | Freeform Wide Field-of-View Spaceborne Imaging Telescope: From Design to Demonstrator |
title_short | Freeform Wide Field-of-View Spaceborne Imaging Telescope: From Design to Demonstrator |
title_sort | freeform wide field-of-view spaceborne imaging telescope: from design to demonstrator |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9654826/ https://www.ncbi.nlm.nih.gov/pubmed/36365926 http://dx.doi.org/10.3390/s22218233 |
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