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Proceedings Paper

Computer-generated hologram (CGH) in optical computing and neural network
Author(s): Roger A. Lessard; Guylain Lemelin
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Paper Abstract

Computer Generated Holograms (CGHs) are attractive devices because of their capacity to reconstruct any wavefront defined by a mathematical function, within the limits of the fabrication techniques. That wavefront modulation can combine or divide an input beam (fan-in and fan-out element): multiple phase functions can be coded in the plane of the CGH, as optimized numerically, doing different task during the same time, without multiplex holograms recorded in the thickness of the element. This feature is particular to CGH of diffractive optical element with surface relief modulation and permits easy copying for mass production. Also, we will present a device for sequence addressing produced by our simple technique, giving about 50% of efficiency with only one mask by simulated misfocussing.

Paper Details

Date Published: 14 September 1994
PDF: 8 pages
Proc. SPIE 2337, Optical Characterization Techniques for High-Performance Microelectronic Device Manufacturing, (14 September 1994); doi: 10.1117/12.186648
Show Author Affiliations
Roger A. Lessard, COPL/Univ. Laval (Canada)
Guylain Lemelin, COPL/Univ. Laval (Canada)


Published in SPIE Proceedings Vol. 2337:
Optical Characterization Techniques for High-Performance Microelectronic Device Manufacturing
Jagdish P. Mathur; John K. Lowell; Ray T. Chen, Editor(s)

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