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

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

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2201..788f&link_type=abstract

Proc. SPIE Vol. 2201, p. 788-799, Adaptive Optics in Astronomy, Mark A. Ealey; Fritz Merkle; Eds.

Physics

Optics

Scientific paper

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.

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