Synthesis of diffractive optical bar codes

Steven J. Bever; Jan P. Allebach

doi:10.1117/12.17926

1 May 1990 Synthesis of diffractive optical bar codes

Steven J. Bever, Jan P. Allebach

Proceedings Volume 1211, Computer and Optically Formed Holographic Optics; (1990) https://doi.org/10.1117/12.17926
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

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.

Citation Download Citation

Steven J. Bever and Jan P. Allebach "Synthesis of diffractive optical bar codes", Proc. SPIE 1211, Computer and Optically Formed Holographic Optics, (1 May 1990); https://doi.org/10.1117/12.17926

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