Research
Linear Plate Equation Analysis for MEMS Deformable Mirror
Project Overview
Adaptive optics help improve the efficiency of ground based astronomical imaging systems by compensating for the unstable medium in the optical path. To accomplish this a wavefront sensor measures the distorted incoming wavefront from a reference object whose ideal wavefront is known. Based on the measured aberrations in the reference wavefront, a correction is applied to the deformable mirror which cleans up the image.
Benefits of Adaptive Optics.
In order to properly correct the image, Micro-Electro-Mechanical System (MEMS) Deformable Mirrors need to be created with the correct design parameters. A MEMS DM can be modeled as a imply supported supported plate, and by using Navier's method, an expression can be found for the displacement of the plate. A simulation was created to analyze the displacement under various loads, as well as the displacement with different sized posts. From the results, the optimal value for the MEMS springs could be determined.