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Proceedings Paper

Synthesis of diffractive optical bar codes
Author(s): Steven J. Bever; Jan P. Allebach
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Paper Abstract

A new type of diffractive optical bar code (DOBC) is proposed. Rather than scan the bar pattern directly, the DOBC is coherently illuminated and the first diffraction order is sensed. The spacing between the bars is chosen so that the thresholded diffraction pattern yields a specified binary code. Two approaches are investigated for synthesis of the DOBC; phase shaping and a gradient-based, nonlinear, constrained optimization technique. The two design methods are compared based on numerical results; and the validity of the overall design approach is verified by optically sensing the diffraction patterns for a number of fabricated DOBC's.

Paper Details

Date Published: 1 May 1990
PDF: 11 pages
Proc. SPIE 1211, Computer and Optically Formed Holographic Optics, (1 May 1990); doi: 10.1117/12.17926
Show Author Affiliations
Steven J. Bever, Purdue Univ. (United States)
Jan P. Allebach, Purdue Univ. (United States)

Published in SPIE Proceedings Vol. 1211:
Computer and Optically Formed Holographic Optics
Ivan Cindrich; Sing H. Lee, Editor(s)

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