
Proceedings Paper
Cryogenic testing of components for the HARMONI spectrographFormat | Member Price | Non-Member Price |
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Paper Abstract
HARMONI is an integral field spectrograph working in the visible and near-infrared (0.47 to 2.45 μm) and will provide
the E-ELT’s core spectroscopic capability, starting at first light. To minimise the thermal background it will be a
cryogenic instrument with the optomechanics inside the cryostat having an operating temperature of 130K. We have
designed three different thermally compensating lens mounts and have started analysing their performance by measuring
the position of a glass blank relative to the mount to look for any displacement and tilt as it cooled down to operating
temperature. The suitability of a commercial iris shutter for use in HARMONI is also assessed and found to work down
to 120K, though further work is needed to prove it is reliable enough to be included in HARMONI, including an
accelerated lifetime test.
Paper Details
Date Published: 18 July 2014
PDF: 11 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91479M (18 July 2014); doi: 10.1117/12.2056340
Published in SPIE Proceedings Vol. 9147:
Ground-based and Airborne Instrumentation for Astronomy V
Suzanne K. Ramsay; Ian S. McLean; Hideki Takami, Editor(s)
PDF: 11 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91479M (18 July 2014); doi: 10.1117/12.2056340
Show Author Affiliations
Jamie R. Allen, Univ. of Oxford (United Kingdom)
Kieran O'Brien, Univ. of Oxford (United Kingdom)
James D. Lynn, Univ. of Oxford (United Kingdom)
Niranjan A. Thatte, Univ. of Oxford (United Kingdom)
Kieran O'Brien, Univ. of Oxford (United Kingdom)
James D. Lynn, Univ. of Oxford (United Kingdom)
Niranjan A. Thatte, Univ. of Oxford (United Kingdom)
Ian Bryson, UK Astronomy Technology Ctr. (United Kingdom)
Fraser Clarke, Univ. of Oxford (United Kingdom)
Hermine Schnetler, UK Astronomy Technology Ctr. (United Kingdom)
Matthias Tecza, Univ. of Oxford (United Kingdom)
Fraser Clarke, Univ. of Oxford (United Kingdom)
Hermine Schnetler, UK Astronomy Technology Ctr. (United Kingdom)
Matthias Tecza, Univ. of Oxford (United Kingdom)
Published in SPIE Proceedings Vol. 9147:
Ground-based and Airborne Instrumentation for Astronomy V
Suzanne K. Ramsay; Ian S. McLean; Hideki Takami, Editor(s)
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