Holographic labeling and reading machine for authentication and security applications
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United States of America Patent
Stats
-
Jul 6, 1999
Grant Date -
N/A
app pub date -
Oct 23, 1996
filing date -
Oct 23, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A holographic security label and automated reading machine for marking and subsequently authenticating any object such as an identification badge, a pass, a ticket, a manufactured part, or a package is described. The security label is extremely difficult to copy or even to read by unauthorized persons. The system comprises a holographic security label that has been created with a coded reference wave, whose specification can be kept secret. The label contains information that can be extracted only with the coded reference wave, which is derived from a holographic key, which restricts access of the information to only the possessor of the key. A reading machine accesses the information contained in the label and compares it with data stored in the machine through the application of a joint transform correlator, which is also equipped with a reference hologram that adds additional security to the procedure.
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