Abstract

A discrete backpropagation method is used to reconstruct the image of an object from the measured scattered field. This inverse is based on the Kirchhoff equation in the space-time domain. Since the integral equation can be viewed as a deconvolution problem, it can be solved by means of a delay and weighted sum-algorithm. The computation is simplified by using only a few of the nearest-neighbor pairs to calculate the field along a nearby coplanar surface.

© 1986 Optical Society of America