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Proceedings Paper

OSIRIS camera barrel optomechanical design
Author(s): Alejandro Farah; Carlos Tejada; Jesus Gonzalez; Francisco J. Cobos; Beatriz Sanchez; Javier Fuentes; Elfego Ruiz
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Paper Abstract

A Camera Barrel, located in the OSIRIS imager/spectrograph for the Gran Telescopio Canarias (GTC), is described in this article. The barrel design has been developed by the Institute for Astronomy of the University of Mexico (IA-UNAM), in collaboration with the Institute for Astrophysics of Canarias (IAC), Spain. The barrel is being manufactured by the Engineering Center for Industrial Development (CIDESI) at Queretaro, Mexico. The Camera Barrel includes a set of eight lenses (three doublets and two singlets), with their respective supports and cells, as well as two subsystems: the Focusing Unit, which is a mechanism that modifies the first doublet relative position; and the Passive Displacement Unit (PDU), which uses the third doublet as thermal compensator to maintain the camera focal length and image quality when the ambient temperature changes. This article includes a brief description of the scientific instrument; describes the design criteria related with performance justification; and summarizes the specifications related with misalignment errors and generated stresses. The Camera Barrel components are described and analytical calculations, FEA simulations and error budgets are also included.

Paper Details

Date Published: 30 September 2004
PDF: 11 pages
Proc. SPIE 5492, Ground-based Instrumentation for Astronomy, (30 September 2004); doi: 10.1117/12.550658
Show Author Affiliations
Alejandro Farah, Univ. Nacional Autonoma de Mexico (Mexico)
Carlos Tejada, Univ. Nacional Autonoma de Mexico (Mexico)
Jesus Gonzalez, Univ. Nacional Autonoma de Mexico (Mexico)
Francisco J. Cobos, Univ. Nacional Autonoma de Mexico (Mexico)
Beatriz Sanchez, Univ. Nacional Autonoma de Mexico (Mexico)
Javier Fuentes, Instituto de Astrofisica de Canarias (Spain)
Elfego Ruiz, Univ. Nacional Autonoma de Mexico (Mexico)

Published in SPIE Proceedings Vol. 5492:
Ground-based Instrumentation for Astronomy
Alan F. M. Moorwood; Masanori Iye, Editor(s)

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