Iterative-Transform Phase Retrieval Using Adaptive Diversity

A phase-diverse iterative-transform phase-retrieval algorithm enables high-spatial-frequency, high-dynamic-range, image-based wavefront sensing. [The terms "phase-diverse," "phase retrieval," "image-based," and "wavefront sensing" are defined in the first of the two immediately preceding articles, "Broadband Phase Retrieval for Image-Based Wavefront Sensing" (GSC-14899-1).] As described below, no prior phase-retrieval algorithm has offered both high dynamic range and the capability to recover high-spatial-frequency components.