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On the optical alignment of the PLATO cameras

Royer, Pierre and Clermont, Lionel and Pertenais, Martin and Baeke, Ann and Huygen, Rik and De Ridder, Joris and Regibo, Sara and Dami, M. and Vandenbussche, Bart and Margeli, A. Belen Balado and Farinato, Jacopo and Greggio, D. and Levillain, Yves and Magrin, D. and Marafatto, L. and Pajas, Miriam and Ramos Zapata, Gonzalo and Guijarro, A. L. Valverde and Viotto, Valentina (2020) On the optical alignment of the PLATO cameras. In: Proceedings of SPIE, 11443, 771 - 783. SPIE. Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave, online. doi: 10.1117/12.2560690.

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Official URL: https://doi.org/10.1117/12.2560690

Abstract

PLATO is an exoplanet hunting mission from the European Space Agency. It is a medium-class mission, with alaunch foreseen in 2026. Its prime objective is to uncover Earth-sized planets residing in the habitable zone of theirhost star. The payload consists of 26 cameras with a very wide field-of-view. While the operational temperatureof the cameras will be−80◦C, the focal plane of each camera will be integrated with its telescope assembly(bearing the optics) at room temperature. The degradation of the optical quality at ambient, combined with thedetector dark current and with the very high accuracy required from the alignment process bring a number ofinteresting challenges. In the present article, we review the alignment concept, present optical simulations of themeasurements at ambient along with their analysis, and present an error budget for the optical measurements.The derivation of this error budget is easily applicable to all optical measurements to be performed during thealignment, i.e. the definition of the best image plane at the operational temperature and the optical alignmentitself, at room temperature.

Item URL in elib:https://elib.dlr.de/140593/
Document Type:Conference or Workshop Item (Speech)
Title:On the optical alignment of the PLATO cameras
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Royer, PierreUNSPECIFIEDUNSPECIFIED
Clermont, LionelUNSPECIFIEDUNSPECIFIED
Pertenais, MartinMartin.Pertenais (at) dlr.deUNSPECIFIED
Baeke, AnnUNSPECIFIEDUNSPECIFIED
Huygen, RikUNSPECIFIEDUNSPECIFIED
De Ridder, JorisUNSPECIFIEDUNSPECIFIED
Regibo, SaraUNSPECIFIEDUNSPECIFIED
Dami, M.UNSPECIFIEDUNSPECIFIED
Vandenbussche, BartUNSPECIFIEDUNSPECIFIED
Margeli, A. Belen BaladoUNSPECIFIEDUNSPECIFIED
Farinato, JacopoUNSPECIFIEDUNSPECIFIED
Greggio, D.UNSPECIFIEDUNSPECIFIED
Levillain, YvesESAUNSPECIFIED
Magrin, D.INAF, Astronomical Institute, Padua, ItalyUNSPECIFIED
Marafatto, L.INAF - Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, ItalyUNSPECIFIED
Pajas, MiriamUNSPECIFIEDUNSPECIFIED
Ramos Zapata, GonzaloUNSPECIFIEDUNSPECIFIED
Guijarro, A. L. ValverdeUNSPECIFIEDUNSPECIFIED
Viotto, ValentinaUNSPECIFIEDUNSPECIFIED
Date:13 December 2020
Journal or Publication Title:Proceedings of SPIE
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:11443
DOI :10.1117/12.2560690
Page Range:771 - 783
Publisher:SPIE
Status:Published
Keywords:PLATO, Optical alignment, Field curvature, Cryo-vacuum test, Error estimate, Simulations, Focal plane, Exoplanet
Event Title:Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave
Event Location:online
Event Type:international Conference
Organizer:SPIE
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project PLATO (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems > Space Instruments
Deposited By: Pertenais, Martin
Deposited On:22 Jan 2021 09:24
Last Modified:22 Jan 2021 09:24

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