
Proceedings Paper
Conceptual design of a cryogenic pupil mechanism with continuous complex movements for HARMONIFormat | Member Price | Non-Member Price |
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Paper Abstract
In order to improve the signal-to-noise ratio of HARMONI (E-ELT first light visible and near-infrared integral field VIR
spectrometer), a pupil mask has been identified to be included at the fore-optics to limit the background radiation coming
into the spectrographs. This mask should rotate synchronously with the telescope pupil during observations, taking into
account the combined effects of the telescope tracking and the de-rotation of the FOV. The implementation of the pupil
mask functionality will require complex movements with high precision at cryogenic temperatures which implies an
important technological challenge.
This paper details a set of experiments completed to gain knowledge and experience in order to accomplish the design
and control of cryogenic mechanisms reaching this type of pupil motion. The conceptual design of the whole mechanism
started from the feedback acquired from those experiments is also described in the following sections.
Paper Details
Date Published: 18 July 2014
PDF: 6 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91513F (18 July 2014); doi: 10.1117/12.2055933
Published in SPIE Proceedings Vol. 9151:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
Ramón Navarro; Colin R. Cunningham; Allison A. Barto, Editor(s)
PDF: 6 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91513F (18 July 2014); doi: 10.1117/12.2055933
Show Author Affiliations
Elvio Hernández, Instituto de Astrofísica de Canarias (Spain)
Luis F. Rodríguez, Instituto de Astrofísica de Canarias (Spain)
José V. Gigante, Instituto de Astrofísica de Canarias (Spain)
Oscar Tubío, Instituto de Astrofísica de Canarias (Spain)
Tomas Moreno, Instituto de Astrofísica de Canarias (Spain)
Jorge Sánchez, Instituto de Astrofísica de Canarias (Spain)
José M. Herreros, Instituto de Astrofísica de Canarias (Spain)
Luis F. Rodríguez, Instituto de Astrofísica de Canarias (Spain)
José V. Gigante, Instituto de Astrofísica de Canarias (Spain)
Oscar Tubío, Instituto de Astrofísica de Canarias (Spain)
Tomas Moreno, Instituto de Astrofísica de Canarias (Spain)
Jorge Sánchez, Instituto de Astrofísica de Canarias (Spain)
José M. Herreros, Instituto de Astrofísica de Canarias (Spain)
Begoña Garcia, Instituto de Astrofísica de Canarias (Spain)
Evencio Mediavilla, Instituto de Astrofísica de Canarias (Spain)
Niranjan Thatte, Univ. of Oxford (United Kingdom)
Ian Bryson, UK Astronomy Technology Ctr. (United Kingdom)
Hermine Schnetler, UK Astronomy Technology Ctr. (United Kingdom)
Fraser Clarke, Univ. of Oxford (United Kingdom)
Matthias Tecza, Univ. of Oxford (United Kingdom)
Evencio Mediavilla, Instituto de Astrofísica de Canarias (Spain)
Niranjan Thatte, Univ. of Oxford (United Kingdom)
Ian Bryson, UK Astronomy Technology Ctr. (United Kingdom)
Hermine Schnetler, UK Astronomy Technology Ctr. (United Kingdom)
Fraser Clarke, Univ. of Oxford (United Kingdom)
Matthias Tecza, Univ. of Oxford (United Kingdom)
Published in SPIE Proceedings Vol. 9151:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
Ramón Navarro; Colin R. Cunningham; Allison A. Barto, Editor(s)
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