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Proceedings Paper

Characterization Techniques For Deformable Metal Mirrors
Author(s): H. R. Garcia; L. D. Brooks
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Paper Abstract

Deformable mirrors must be subjected to a series of tests in order to accurately assess their structural integrity and predict their operational performance in a closed-loop system. These tests consist of monitoring the surface under various drive conditions. Among the parameters determined from the surface measurements are actuator surface influence functions, hysteresis effects and frequency response. They are used to characterize a deformable mirror by providing information about inter-actuator coupling, drive response linearity and frequency bandwidths. When piezoelectric actua-tors are used, large drive voltages are necessary, which when coupled with high drive frequencies and small surface motion, makes acquisition of accurate data a complex task. This paper describes and compares several laboratory techniques currently being used to measure these and other deformable metal mirror characteristics for two mirror types: dither (high frequency, small surface excursion), and control (low frequency, large surface excursions).

Paper Details

Date Published: 8 August 1978
PDF: 8 pages
Proc. SPIE 0141, Adaptive Optical Components I, (8 August 1978); doi: 10.1117/12.956515
Show Author Affiliations
H. R. Garcia, Pratt & Whitney Aircraft Group (United States)
L. D. Brooks, Pratt & Whitney Aircraft Group (United States)

Published in SPIE Proceedings Vol. 0141:
Adaptive Optical Components I
Sandor Holly; Lawrence James, Editor(s)

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