Hologram identification device
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United States of America Patent
Stats
-
Jan 7, 1986
Grant Date -
N/A
app pub date -
Mar 16, 1983
filing date -
Mar 16, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An identification device in the form of a security card or anti-counterfeiting label which comprises a hologram visible by reflection in incident natural light, the film emulsion having been permanently deformed so that the interference fringe spacings differ from those in a non-deformed emulsion, thereby to change from one part of the hologram to another the wavelength of light which is visible by reflection from the hologram.
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