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Proceedings Paper

Design of a slit mechanism for OSIRIS
Author(s): Carmelo Militello; Santiago Correa; Jaime Perez; F. Javier Fuentes; Rosario M. Perez de Taoro; Jordi Cepa; Lorenzo Peraza
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Paper Abstract

OSIRIS (Optical System for Imaging and low/intermediate-Resolution Integrated Spectroscopy) is an instrument designed to obtain images and low resolution spectra of astronomical objects in the optical domain (from 365 through 1000nm). It will be installed on Day One in the Nasmyth focus of the 10-meter Spanish GTC Telescope, although it shall be possible to install it in the Cassegrain focus as well. It is expected to be in operation at the end of 2003. The Slit Unit is an automated slit mask loader based in cam followers technology, being designed at the IAC for the OSIRIS Spectrograph. It provides a store with space for as many as 13 multislits mask and long slit mask for an unvignetted field of view of 8.53'x8.67', available at the same time for observing purposes. A two-degrees-of-freedom mechanism allows to select one of the masks, to remove it from the cassette and to position it in the focal plane with the required repeatability. The complete design of the mechanism is presented, including an analysis of the predicted performances and a 3-D model used to check the geometry and mass properties.

Paper Details

Date Published: 7 March 2003
PDF: 12 pages
Proc. SPIE 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, (7 March 2003); doi: 10.1117/12.459954
Show Author Affiliations
Carmelo Militello, Univ. de La Laguna (Spain)
Santiago Correa, Instituto de Astrofisica de Canarias (Spain)
Jaime Perez, Instituto de Astrofisica de Canarias (Spain)
F. Javier Fuentes, Instituto de Astrofisica de Canarias (Spain)
Rosario M. Perez de Taoro, Instituto de Astrofisica de Canarias (Spain)
Jordi Cepa, Instituto de Astrofisica de Canarias (Spain)
Univ. de La Laguna (Spain)
Lorenzo Peraza, Instituto de Astrofisica de Canarias (Spain)


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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