<title>Optical processor for SAR image formation: performance trades</title>

Abstract

We present characteristics, consider some performance trades, and give experimental results for an optoelectronic processor for synthetic aperture radar (SAR) image formation. A 2-D Fourier transforming time-integrating interferometricaliy based optical processor is a key element of the system. The optical processor uses a modulated laser diode for radar signal insertion, crossed 1-D acousto-optic scanners for 2-D scanning, a modified Köster interferometer for fringe generation, and fast detector arrays (cameras) for light detection and integration. The image dynamic range is enhanced by processing many camera frames. Digital pre-and post-processing play essential roles in the system enhancement