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  Opto-mechanical alignment results of the Euclid near infrared spectro-photometer optical assembly NI-OA

Thiele, H., Mottaghibonab, A., Dubowy, M., Mecsaci, A., Gubbini, E., Gawlik, K., et al. (2019). Opto-mechanical alignment results of the Euclid near infrared spectro-photometer optical assembly NI-OA. In Z. Sodnik, N. Karafolas, & C. Bruno (Eds.), International Conference on Space Optics — ICSO 2018. doi:10.1117/12.2536022.

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Opto-mechanical alignment results of the Euclid near infrared spectro-photometer optical assembly NI-OA.pdf (beliebiger Volltext), 3MB
 
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Thiele, H., Autor
Mottaghibonab, A., Autor
Dubowy, M., Autor
Mecsaci, A., Autor
Gubbini, E., Autor
Gawlik, K., Autor
Grupp, F.1, Autor           
Penka, D.1, Autor           
Kaminski, J.1, Autor           
Affiliations:
1Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159895              

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 Zusammenfassung: The Euclid payload features two instruments that are observing the sky simultaneously. The visual light high spatial resolution imager (VIS) and the Near Infrared Spectrometer and Photometer (NISP). A Korsch type telescope with 1,2m diameter feeds both instruments via a dichroic beamsplitter. The NISP instrument reduces the incoming f/#20 beam of the telescope to an f/# 10 beam. The instruments optical system, the NISP Optical Assembly (NI-OA) contains 4 lenses, one single lens in front of a Grism and Filter wheel which is called collimator lens assembly (CoLA), and a lens triplet between these Grism and Filter wheel and the instruments focal plane, which is called camera lens assembly (CaLA). The focal plane consists of 16 Hawaii 2RG detectors.

The required alignment accuracy of the lens triplet and of the singlet relative to the triplet is very demanding and needs to be achieved and verified at the operational temperature of 134K. As an introduction the design, the integration and alignment concept are briefly summarized, as well as the measurement concept to verify the cold alignment within the cryostat. Alignment results for the integration of CaLA EQM and FM at room temperature are presented, the alignment stability after vibrational loads and thermal vacuum cycling is high, only minor changes of a few μm and arcsecs can be detected. The accuracy of the measured cryogenic alignment is demonstrated to be just a few μm and arcsec off the ideal predicted opto-mechanical alignment.

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 Datum: 2019-07-12
 Publikationsstatus: Online veröffentlicht
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 Identifikatoren: DOI: 10.1117/12.2536022
Anderer: LOCALID: 3231013
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Veranstaltung

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Titel: INTERNATIONAL CONFERENCE ON SPACE OPTICS - ICSO 2018
Veranstaltungsort: Chania, Greece
Start-/Enddatum: 2018-10-09 - 2018-10-12

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Titel: International Conference on Space Optics — ICSO 2018
Genre der Quelle: Konferenzband
 Urheber:
Sodnik, Zoran , Herausgeber
Karafolas, Nikos , Herausgeber
Bruno , Cugny, Herausgeber
Affiliations:
-
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 11180 Artikelnummer: 111802V Start- / Endseite: - Identifikator: -

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Titel: Proceedings of SPIE
Genre der Quelle: Reihe
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Ort, Verlag, Ausgabe: SPIE-INT SOC OPTICAL ENGINEERING
Seiten: - Band / Heft: - Artikelnummer: - Start- / Endseite: - Identifikator: ISSN: 0277-786X