OSIRIS camera barrel optomechanical design

Alejandro Farah; Carlos Tejada; Jesus Gonzalez; Francisco J. Cobos; Beatriz Sanchez; Javier Fuentes; Elfego Ruiz

doi:10.1117/12.550658

30 September 2004 OSIRIS camera barrel optomechanical design

Alejandro Farah, Carlos Tejada, Jesus Gonzalez, Francisco J. Cobos, Beatriz Sanchez, Javier Fuentes, Elfego Ruiz

Proceedings Volume 5492, Ground-based Instrumentation for Astronomy; (2004) https://doi.org/10.1117/12.550658
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

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.

Citation Download Citation

Alejandro Farah, Carlos Tejada, Jesus Gonzalez, Francisco J. Cobos, Beatriz Sanchez, Javier Fuentes, and Elfego Ruiz "OSIRIS camera barrel optomechanical design", Proc. SPIE 5492, Ground-based Instrumentation for Astronomy, (30 September 2004); https://doi.org/10.1117/12.550658

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