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Optical Hartley transforms

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1 Author(s)
Villasenor, J.D. ; Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA

The two-dimensional Hartley transform is of particular interest not only as a tool for analysis and processing of images and other two-dimensional functions, but because it can be implemented optically without introducing the phase ambiguities associated with intensity-only observations of Fourier transforms. The Hartley transform property of producing real transforms from real inputs means that square law detection introduces only a sign ambiguity, which can be resolved much more easily than a phase ambiguity. This suggests applications in optical signal processing, holography, and optical diffraction

Published in:

Proceedings of the IEEE  (Volume:82 ,  Issue: 3 )