System for verifying authenticity of various articles
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United States of America Patent
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-
Jun 6, 1989
Grant Date -
N/A
app pub date -
Feb 26, 1987
filing date -
Feb 26, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Representations are developed that characterize an article for identification by comparison with a reference standard as an escort memory. The representations are reduced to a binary tri-level code covering two extreme possibilities and an intermediate range for indecisive cases. Characteristics are sensed by light in one form by interferometer techniques.
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