1. A wavefront phase imaging method, comprising the steps of: providing an optical wavefront; providing a wavefront phase imager for generating images using an array of pixels with each of said pixels defined by a size dimension; acquiring a plurality of phase images in a plane of the optical wavefront using the phase imager wherein each of said phase images is unique and shifted in said plane with respect to another of said phase images by a known amount that is less than the pixels' size dimension; and combining said plurality of phase images to generate a single high-spatial frequency phase image of the optical wavefront.