Characterization Techniques For Deformable Metal Mirrors

H. R. Garcia; L. D. Brooks

doi:10.1117/12.956515

8 August 1978 Characterization Techniques For Deformable Metal Mirrors

H. R. Garcia, L. D. Brooks

Proceedings Volume 0141, Adaptive Optical Components I; (1978) https://doi.org/10.1117/12.956515
Event: 1978 Technical Symposium East, 1978, Washington, D.C., United States

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).

Citation Download Citation

H. R. Garcia and L. D. Brooks "Characterization Techniques For Deformable Metal Mirrors", Proc. SPIE 0141, Adaptive Optical Components I, (8 August 1978); https://doi.org/10.1117/12.956515

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