Shape control of piezoelectric bimorph mirrors

Shawn Edward Burke; James E. Hubbard Jr.

doi:10.1117/12.48266

1 December 1991 Shape control of piezoelectric bimorph mirrors

Shawn Edward Burke, James E. Hubbard Jr.

Proceedings Volume 1532, Analysis of Optical Structures; (1991) https://doi.org/10.1117/12.48266
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

The application of monolithic piezoelectric bimorph deformable mirrors for optical wavefront correction is studied. These mirrors are fabricated from laminations of biaxial piezoelectric polymer sheets. The equations of motion governing flexural and thickness motions are derived from first principles, assuming linearly elastic biaxially-poled laminae. The bimorph is segmented into actuation 'zones' for structural control, providing actuation in terms of distributed moments. It is shown that this actuation strategy provides influence functions with a significantly more localized response (e.g., a higher spatial bandwidth) than point force/displacement actuation for structures having equivalent geometric and material properties. This is due to the bimorph actuation providing a spatial differentiation of the structural response as compared to point force actuation.

Citation Download Citation

Shawn Edward Burke and James E. Hubbard Jr. "Shape control of piezoelectric bimorph mirrors", Proc. SPIE 1532, Analysis of Optical Structures, (1 December 1991); https://doi.org/10.1117/12.48266

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