Adaptive modal superposition mirror
Traditional adaptive optics (AO) deformable mirrors use segmented actuator patterns requiring elaborate manufacturing techniques. The range of surface curvatures used for corrective action can be described by Zernike polynomials, which are a sequence of orthogonal polynomials on the unit circle. The vibration modes of a circular membrane exhibit striking similarities to Zernike polynomials; it fact, they can be all expressed as functions of Bessel functions. This leads to the possibility of using a vibrating membrane mirror in adaptive optics. The objective of this project is to design, manufacture and test a modeshape mirror capable of reproducing the essential Zernike polynomials to be used in adaptive optics.
Description of Work:
This project involves design and conduct of laser experiments, high levels of signal processing and analysis techniques as well as possible numerical modelling.