The dynamics of a piezoelectric vibrating membrane mirror (VMM) is studied under harmonic loads as an alternative to traditionally actuated adaptive optics (AO) mirrors. The remarkable electro-mechanical properties of Polyvinylidene fluoride (PVDF) films along with their metalized reflective surfaces makes them ideal candidates for the affordable fabrication of deformable mirrors. To assist in the testing of the piezoelectric VMM, a 3D printed drum holder with adjustable membrane tension was built. The vibration modes of the uniaxially polarized PVDF membrane was measured using a Polytec Scanning Vibrometer (PSV) to extract its dynamic characteristics and to compare with optical wavefront aberration Zernikes and finite element results from literature. This paper reports on the initial experiments on using this novel piezoelectric vibrating mirror concept in adaptive optics.
© 2016 Optical Society of AmericaPDF Article