Comparison Of Hybrid-Optical And Digital Computers For Real-Time 2-D Fourier Transform Based Operations

N. S. Subotic; C. C. Aleksoff; A. M. Tai

doi:10.1117/12.947799

8 February 1989 Comparison Of Hybrid-Optical And Digital Computers For Real-Time 2-D Fourier Transform Based Operations

N. S. Subotic, C. C. Aleksoff, A. M. Tai

Proceedings Volume 0960, Real-Time Signal Processing for Industrial Applications; (1989) https://doi.org/10.1117/12.947799
Event: SPIE International Symposium on Optical Engineering and Industrial Sensing for Advance Manufacturing Technologies, 1988, Dearborn, MI, United States

Abstract

Both hybrid optical and digital architectures are being used to perform 2-D Fourier transform based operations. It will be shown in this paper that for rectilinearly formatted data, digital systems are competitive with and in some instances out perform their hybrid-optical counterparts. However, as the input data format deviates significantly from rectilinear, the added reformatting computations which digital systems must undertake in order to utilize the Fast Fourier Transform algorithm degrades system performance and hybrid-optical systems become more attractive. These hybrid-optical processors may be the systems of choice for many potential applications which include tomographic processing, VLA radio telescope image formation, diffraction tomography, seismic cross-borehole tomography, and spotlight SAR image formation. Each of the above applications produce data in a unique non-rectilinear format. Numerous system architectures for both technologies exist today. This paper will enumerate the potential hybrid-optical and digital: architectures and compare their performance characteristics. A common system packaging (size/weight/power) constraint is imposed upon both technolgies to facilitate a fair comparison. A near term performance forecast will also be made for both technologies.

Citation Download Citation

N. S. Subotic, C. C. Aleksoff, and A. M. Tai "Comparison Of Hybrid-Optical And Digital Computers For Real-Time 2-D Fourier Transform Based Operations", Proc. SPIE 0960, Real-Time Signal Processing for Industrial Applications, (8 February 1989); https://doi.org/10.1117/12.947799

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