Wavefront Correction Using Deformable Mirror for Extended Scene: Experimental Result

Abstract

We are developing an image based adaptive optics system using a micro electro mechanical system (MEMS) deformable mirror for earth observing sensors. We proposed two algorithms for control of the deformable mirror, a stochastic parallel gradient descent (SPGD) optimization and a deformable mirror diversity estimation. We developed an adaptive optics system testbed using a commercial astronomical telescope and a MEMS deformable mirror. We observed a distant building pattern from our laboratory, then controlled the deformable mirror to compensate the wavefront aberration. Experimental results show that misalignments and wavefront aberrations are compensated and image qualities are improved.