Matrix of 64x64 computer-generated holograms for an optical Hough transform processor

Sophie Laut; Fang Xu; Pierre Ambs; Yeshaiahu Fainman

doi:10.1117/12.304947

1 April 1998 Matrix of 64x64 computer-generated holograms for an optical Hough transform processor

Sophie Laut, Fang Xu, Pierre Ambs, Yeshaiahu Fainman

Proceedings Volume 3402, Optical Information Science and Technology (OIST97): Optical Memory and Neural Networks; (1998) https://doi.org/10.1117/12.304947
Event: Optical Information Science and Technology, 1997, Moscow, Russian Federation

Abstract

An optical implementation of the Hough transform (HT) based on a matrix of 64 X 64 four-level phase computer generated holograms is described. The HT holograms are designed using a novel algorithm that combines the high speed of convergence of iterative Fourier algorithm with the high precision of the direct binary search algorithm. The matrix of holograms was fabricated using standard microfabrication techniques: E-beam lithography, photolithography and chemically assisted ion beam etching. The fabricated elements were characterized experimentally and used in the HT processor, demonstrating practical application examples as real-time straight line, ellipse, circle detection, and other pattern recognition tasks.

Citation Download Citation

Sophie Laut, Fang Xu, Pierre Ambs, and Yeshaiahu Fainman "Matrix of 64x64 computer-generated holograms for an optical Hough transform processor", Proc. SPIE 3402, Optical Information Science and Technology (OIST97): Optical Memory and Neural Networks, (1 April 1998); https://doi.org/10.1117/12.304947

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