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Opto-mechanical design of a new Cross Dispersion Unit for the CRIRES plus high resolution spectrograph for the VLT
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2014 (English)In: GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY V, 2014, Vol. 9147, 91477SConference paper (Refereed)
Abstract [en]

CRIRES is one of the few IR (0.92-5.2 mu m) high-resolution spectrographs in operation at the VLT since 2006. Despite good performance it suffers a limitation that significantly hampers its ability: a small spectral coverage per exposure. The CRIRES upgrade (CRIRES+) proposes to transform CRIRES into a cross-dispersed spectrograph while maintaining the high resolution (100000) and increasing the wavelength coverage by a factor 10 compared to the current capabilities. A major part of the upgrade is the exchange of the actual cryogenic pre-disperser module by a new cross disperser unit. In addition to a completely new optical design, a number of important changes are required on key components and functions like the slit unit and detectors units. We will outline the design of these new units fitting inside a predefined and restricted space. The mechanical design of the new functions including a description and analysis will be presented. Finally we will present the strategy for the implementation of the changes.

Place, publisher, year, edition, pages
2014. Vol. 9147, 91477S
, Proceedings of SPIE, ISSN 0277-786X
Keyword [en]
Infrared instrumentation, cryogenic instrument, cryo-mechanisms
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:uu:diva-257489DOI: 10.1117/12.2054800ISI: 000354527800234ISBN: 978-0-8194-9615-7OAI: oai:DiVA.org:uu-257489DiVA: diva2:846425
5th Conference on Ground-Based and Airborne Instrumentation for Astronomy, JUN 22-26, 2014, Montreal, CANADA
Available from: 2015-08-17 Created: 2015-07-02 Last updated: 2015-08-17Bibliographically approved

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Heiter, UlrikeMarquart, Thomas
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Observational Astronomy
Astronomy, Astrophysics and Cosmology

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