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Optical Engineering

Multidirectional Holographic Scanner For Point-Of-Sale Bar-Code Symbol Reader
Author(s): Kazuro Nishi; Koichiro Kurahashi; Takahiro Kubo
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Paper Abstract

A multidirectional laser beam scanning method using holographic zone plates is described. To increase the number of scanning directions, not only is a hologram disk rotated at fixed speed (col ), but a laser beam incident on the disk is reversely rotated at another speed (w2). The focus of the laser beam diffracted by the hologram disk draws multidirectional scanning lines. The number of scanning directions (n) is equal to (w1 /c02) + 1. Experimentally, the effectiveness of this method is demonstrated for nineteen scanning directions. This scan method is applied to a point-of-sale (POS) scanner to read a non-moving bar-code symbol.

Paper Details

Date Published: 1 December 1984
PDF: 4 pages
Opt. Eng. 23(6) 236784 doi: 10.1117/12.7973383
Published in: Optical Engineering Volume 23, Issue 6
Show Author Affiliations
Kazuro Nishi, Mitsubishi Electric Corporation (Japan)
Koichiro Kurahashi, Mitsubishi Electric Corporation (Japan)
Takahiro Kubo, Mitsubishi Electric Corporation (Japan)

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