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Proceedings Paper

Cryogenic MOS unit for LUCIFER
Author(s): Reiner Hofmann; Holger Mandel; Walter Seifert; Andreas Seltmann; Niranjan A. Thatte; Daigo Tomono; Harald Weisz
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Paper Abstract

We present a system for the exchange and handling of cold field masks in LUCIFER, the near infrared camera and spectrograph for the LBT. Inside the LUCIFER cryostat, 10 field-stop and long-slit masks, and 23 multi-slit masks are stored in a stationary and an exchangeable cabinet respectively. With LUCIFER at operating temperature, the exchangeable cabinet with its multi-slit masks can be transferred from the LUCIFER cryostat to an auxiliary cryostat, and a second cabinet harboring the newly made, pre-cooled masks can be transferred back to LUCIFER from a second auxiliary cryostat. Inside LUCIFER, a robot transports the individual masks from their storage position in the cabinet to the focal plane and inserts them in a mask mount where they are centered on two pins. The position accuracy of the masks in the focal plane is anticipated to be better than ± 10 μm. A mechanism which locks the masks in their cabinets and releases only the one connected to the transport robot permits mask exchange in arbitrary orientation of the cryostat.

Paper Details

Date Published: 7 March 2003
PDF: 11 pages
Proc. SPIE 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, (7 March 2003); doi: 10.1117/12.460892
Show Author Affiliations
Reiner Hofmann, Max-Planck-Institut fuer Extraterrestrische (Germany)
Holger Mandel, Landessternwarte Heidelberg-Koenigstuhl/Univ. Heidelberg (Germany)
Walter Seifert, Landessternwarte Heidelberg-Koenigstuhl/Univ. Heidelberg (Germany)
Andreas Seltmann, Landessternwarte Heidelberg-Koenigstuhl/Univ. Heidelberg (Germany)
Niranjan A. Thatte, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Daigo Tomono, Max-Planck-Institut fuer extraterrestrische Physik (Germany)
Harald Weisz, Ingenierbuero fuer den Maschinenbau (Germany)

Published in SPIE Proceedings Vol. 4841:
Instrument Design and Performance for Optical/Infrared Ground-based Telescopes
Masanori Iye; Alan F. M. Moorwood, Editor(s)

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