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Proceedings Paper

High-performance chopping secondary mirror for infrared astronomy
Author(s): Kenneth R. Lorell; Jean-Noel Aubrun; Gregory J. Feher; Ernesto O. Perez; Donald F. Zacharie; Paul J. Reshatoff
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Paper Abstract

The paper describes the electromechanical design of the drive system for the actively controlled chopping secondary mirror of the W.M. Keck Ten Meter Telescope, which performs two-axis spatial chopping. Also described are the reaction cancellation system, the special packaging and cooling features, and the operation of the adaptive drive system. Laboratory test data are presented showing the performance of the drive and control system for chop amplitudes up to 54 arcmin (mirror motion), duty cycles of up to 98 percent, and frequencies from 1 to 50 Hz.

Paper Details

Date Published: 21 January 1993
PDF: 13 pages
Proc. SPIE 1765, Cryogenic Optical Systems and Instruments V, (21 January 1993); doi: 10.1117/12.140884
Show Author Affiliations
Kenneth R. Lorell, Lockheed Palo Alto Research Lab. (United States)
Jean-Noel Aubrun, Lockheed Palo Alto Research Lab. (United States)
Gregory J. Feher, Lockheed Palo Alto Research Lab. (United States)
Ernesto O. Perez, Lockheed Palo Alto Research Lab. (United States)
Donald F. Zacharie, Lockheed Palo Alto Research Lab. (United States)
Paul J. Reshatoff, Lockheed Palo Alto Research Lab. (United States)


Published in SPIE Proceedings Vol. 1765:
Cryogenic Optical Systems and Instruments V
Ramsey K. Melugin, Editor(s)

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