Real-time wavefront reconstruction for extended object based on phase diversity

We present a real-time solution to the phase diversity problem when the observed objects are extended scenes. It utilizes an iterative linearization of the optical transfer functions (OTF) in at least two diversity planes by a first-order Taylor expansion to reconstruct initial wavefront. Vast simulation experiments are processed to verify the presented algorithm, including comparing our algorithm with the analytic estimator method, demonstrating that our method has high wavefront detection accuracy and large linearity range.