Interferometric measurement and analysis of influence functions for a large deformable mirror

Mark E. Furber; Charles D. Cox; David Blaszak; Charles D. Houghton

doi:10.1117/12.176114

31 May 1994 Interferometric measurement and analysis of influence functions for a large deformable mirror

Mark E. Furber, Charles D. Cox, David Blaszak, Charles D. Houghton

Proceedings Volume 2201, Adaptive Optics in Astronomy; (1994) https://doi.org/10.1117/12.176114
Event: 1994 Symposium on Astronomical Telescopes and Instrumentation for the 21st Century, 1994, Kailua, Kona, HI, United States

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.

Citation Download Citation

Mark E. Furber, Charles D. Cox, David Blaszak, and Charles D. Houghton "Interferometric measurement and analysis of influence functions for a large deformable mirror", Proc. SPIE 2201, Adaptive Optics in Astronomy, (31 May 1994); https://doi.org/10.1117/12.176114

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