Bibcode
Farah, Alejandro; Tejada, Carlos; Gonzalez, Jesus; Cobos, Francisco J.; Sanchez, Beatriz; Fuentes, Javier; Ruiz, Elfego
Referencia bibliográfica
Ground-based Instrumentation for Astronomy. Edited by Alan F. M. Moorwood and Iye Masanori. Proceedings of the SPIE, Volume 5492, pp. 880-890 (2004).
Advertised on:
9
2004
Número de citas
1
Número de citas referidas
0
Descripción
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.