Thermal gradient analysis for the ESOPO spectrograph

A. Farah; J. Jesús González; G. Sierra; J. V. Hernández; M. Pedrayes; J. Echevarría; R. Costero; G. Avila; M. Arroyo; F. Cobos; E. Colorado; A. Cordova; O. Chapa; B. Garcia; F. Garfias; F. Granados; G. Guisa; E. Luna; B. Martínez; R. Michel; F. Murillo; F. Pérez; S. Quechol; F. Quirós; C. Tejada

doi:10.1117/12.790213

23 July 2008 Thermal gradient analysis for the ESOPO spectrograph

A. Farah, J. Jesús González, G. Sierra, J. V. Hernández, M. Pedrayes, J. Echevarría, R. Costero, G. Avila, M. Arroyo, F. Cobos, E. Colorado, A. Cordova, O. Chapa, B. Garcia, F. Garfias, F. Granados, G. Guisa, E. Luna, B. Martínez, R. Michel, F. Murillo, F. Pérez, S. Quechol, F. Quirós, C. Tejada

Author Affiliations +

Proceedings Volume 7014, Ground-based and Airborne Instrumentation for Astronomy II; 70146Y (2008) https://doi.org/10.1117/12.790213
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

ESOPO will be a spectrograph of medium resolution for the 2.1 m telescope of the National Observatory at San Pedro Martir, Baja California, Mexico. It has been developed by the Instituto de Astronomia of the Universidad Nacional Autonoma de Mexico (IA-UNAM). The main goal of this instrument is to modernize the capabilities of making science with that particular telescope. It is planned to achieve a spectral resolution between 500 and 5000. ESOPO is split into two arms; each one specialized in a specific wavelength range covering together all the visible light. A very important issue in spectrographs is to avoid inside thermal gradients. Different temperatures in the optical elements produce mechanical movements and image quality degradation during an exposition. The error budget analysis developed for ESOPO allows establishing the required limits for temperature gradients. In this paper is described the thermal analysis of the spectrograph, including specifications, finite element models, thermal equations and expected thermal gradients.

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A. Farah, J. Jesús González, G. Sierra, J. V. Hernández, M. Pedrayes, J. Echevarría, R. Costero, G. Avila, M. Arroyo, F. Cobos, E. Colorado, A. Cordova, O. Chapa, B. Garcia, F. Garfias, F. Granados, G. Guisa, E. Luna, B. Martínez, R. Michel, F. Murillo, F. Pérez, S. Quechol, F. Quirós, and C. Tejada "Thermal gradient analysis for the ESOPO spectrograph", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70146Y (23 July 2008); https://doi.org/10.1117/12.790213

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KEYWORDS

Spectrographs

3D modeling

Finite element methods

Solid modeling

Temperature metrology

Interfaces

Computer aided design

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