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Proceedings Paper

Interferometric measurement and analysis of influence functions for a large deformable mirror
Author(s): Mark E. Furber; Charles D. Cox; David Blaszak; Charles D. Houghton
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Paper Abstract

A large deformable mirror with 144 actuators was tested in a center-of-curvature configuration. The influence function of an actuator, i.e., the change in wavefront error produced by a unit command to that actuator, was measured interferometrically and compared to predictions made by a finite-element model of the mirror. Good agreement between the measurement and the prediction in both magnitude and shape was found, serving to validate the finite-element model. The measurement process, the finite-element model, error sources, and the dependence of the influence function on the electrostrictive actuator response are discussed.

Paper Details

Date Published: 31 May 1994
PDF: 12 pages
Proc. SPIE 2201, Adaptive Optics in Astronomy, (31 May 1994); doi: 10.1117/12.176114
Show Author Affiliations
Mark E. Furber, Litton Itek Optical Systems (United States)
Charles D. Cox, Litton Itek Optical Systems (United States)
David Blaszak, Litton Itek Optical Systems (United States)
Charles D. Houghton, Litton Itek Optical Systems (United States)


Published in SPIE Proceedings Vol. 2201:
Adaptive Optics in Astronomy
Mark A. Ealey; Fritz Merkle, Editor(s)

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