A new high density magnetic bar code system

Naoyuki Watanabe, Ichiro Sasada, Naoshi Asuke

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


Magnetic bar codes can be used in dirty environments instead of optical bar codes or as invisible codes in order to enhance the security of prepaid cards. In this article, we propose a high density magnetic bar code system in which the existence or nonexistence of a bar element is detected by a magnetic bridge. A micro head constituting a magnetic bridge is fabricated with thin amorphous cores and thin copper wire coils. The magnetic bar elements are printed with magnetic ink. The basic characteristics, such as signal separation from neighboring bar elements, are discussed in terms of the element width and the space between two adjacent elements.

Original languageEnglish
Pages (from-to)5462-5464
Number of pages3
JournalJournal of Applied Physics
Issue number8 II B
Publication statusPublished - Apr 15 1999
EventProceedings of the 43rd Annual Conference on Magnetism and Magnetic Materials - Miami, FL, United States
Duration: Nov 9 1998Nov 12 1998

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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