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Proceedings Paper

Mirror cell and active support system of the Mexican infrared optical telescope (TIM)
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Paper Abstract

We present the conceptual design of the primary mirror support system of the 7.8 m Mexican Infrared-Optical Telescope. The primary mirror consists of 19 hexagonal off- axis parabolic Zerodur segments, which are carried by a tubular, lightweight and high stiffness cell structure. Each segment is actively supported by 19 pneumatic actuators, that cover the whole back area and provide a uniform force distribution. The array of actuators will be able to correct for high order aberrations. Each of these actuators contains a hydraulic damping system to provide a stiff coupling to the tubular cell to sustain the wind buffeting. The tip/tilt and piston control of each segment will be done through three axial, nanometer resolution position defining actuators. The lateral positioning of each segment is performed through 3 independent electro-mechanical actuators. With the combination of the whole set of actuators and differential positioning sensors, the phasing or coherent superposition of images of the segments, will be more feasible. The whole system will be cost effective, since several subsystems have already been tested on our 2.1 m telescope.

Paper Details

Date Published: 25 August 1998
PDF: 7 pages
Proc. SPIE 3352, Advanced Technology Optical/IR Telescopes VI, (25 August 1998); doi: 10.1117/12.319299
Show Author Affiliations
Elfego Ruiz Schneider, Univ. Nacional Autonoma de Mexico (Mexico)
Erika Sohn, Univ. Nacional Autonoma de Mexico (Mexico)
Irene Cruz-Gonzales, Univ. Nacional Autonoma de Mexico (Mexico)
Luis Salas, Univ. Nacional Autonoma de Mexico (United States)
Maria H. Pedrayes, Univ. Nacional Autonoma de Mexico (Mexico)
Gerardo Sierra, Univ. Nacional Autonoma de Mexico (United States)

Published in SPIE Proceedings Vol. 3352:
Advanced Technology Optical/IR Telescopes VI
Larry M. Stepp, Editor(s)

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