Method of legitimate product identification and seals and identification apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jun 20, 1995
Grant Date -
N/A
app pub date -
Nov 2, 1992
filing date -
Nov 8, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A Fourier transform hologram image is created on a sheet on the seal. The image is made, by making a die from the Fourier transform hologram image master plate and by molding resin on the die. The image formed on the sheet is reconstructed by an identification apparatus. The identification apparatus contains the laser emitting device and the screen for receiving the reflecting laser beam. The laser beam is illuminated vertically against the sheet from the laser emitting device. The laser beam reflected from the sheet surface is received by the screen, and the image of the sheet is reconstructed on the screen. At this time, it is possible to check whether the laser beam is reaching the sheet from an opening in the casing.
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