Patent ID: 6229649
Filing Date: 2001-05-08
Classification: G02B,G06E,G06K,Y10S

Abstract:
A pseudo deconvolving method for recovering an optical image, which has been distorted by its convolution with a distortion function, by the convolution of the Fourier transformed distorted image with a filter approximating the reciprocal of the Fourier transformed distortion function comprising the steps of:(a) producing a Fourier transform of a wavefront distorted optical image at a Fourier transform plane;(b) approximating the exact phase portion of the reciprocal Fourier transform of the distortion function with a phase encoded filter having the form selected from the group consisting essentially of a binary phase coded filter, a ternary phase coded filter, and an amplitude coded filter having a shifted distortion function;(c) providing said phase encoded filter at said Fourier transform plane;(d) approximating the amplitude portion of the reciprocal Fourier transform of the distortion function with an amplitude encoded filter having a transmittance function which is statistically similar to the reciprocal spatial frequency spectrum of the Fourier transform of the distortion function;(e) providing said amplitude encoded filter at said Fourier transform plane to produce an intermediate signal at the Fourier transform plane; and(f) Fourier transforming said intermediate signal in order to recover the optical image having a substantially reduced degree of distortion.