Optical processor for SAR image formation: performance trades

Carl C. Aleksoff; Nikola S. Subotic

doi:10.1117/12.212037

16 June 1995 Optical processor for SAR image formation: performance trades

Carl C. Aleksoff, Nikola S. Subotic

Proceedings Volume 2489, Transition of Optical Processors into Systems 1995; (1995) https://doi.org/10.1117/12.212037
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

We describe some performance trades for a hybrid optical processor for real-time synthetic aperture radar (SAR) image formation. A 2D Fourier transforming time-integrating interferometrically based optical processor is a key element of the system. The optical processor uses a modulated laser diode for radar signal insertion, crossed 1D acousto-optic scanners for 2D scanning, a modified Koster 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. We present the characteristics of this type of processor and consider some of its performance trades. The optical processor design approach lends itself to the important attributes of high (real-time) data rates, multiple SAR mode processing capabilities, compact and rugged packaging, and power efficiency.

Citation Download Citation

Carl C. Aleksoff and Nikola S. Subotic "Optical processor for SAR image formation: performance trades", Proc. SPIE 2489, Transition of Optical Processors into Systems 1995, (16 June 1995); https://doi.org/10.1117/12.212037

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