Optical: systems and elements – Holographic system or element – Authentication
Patent
1992-11-02
1995-06-20
Sugarman, Scott J.
Optical: systems and elements
Holographic system or element
Authentication
359 29, 359 32, 235457, 235472, 283 81, 283 86, G03H 100
Patent
active
054265207
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.
REFERENCES:
patent: 3620590 (1971-11-01), Barker
patent: 4353622 (1982-10-01), Gale et al.
patent: 4603262 (1986-07-01), Eastman et al.
patent: 5063508 (1991-11-01), Yamada et al.
patent: 5105070 (1992-04-01), Wike, Jr. et al.
patent: 5107100 (1992-04-01), Shepard et al.
patent: 5142384 (1992-08-01), Wood et al.
R. Collier et al, Optical Holography, Academic Press, New York, 1971, p. 209.
Isaka Isao
Kakae Hayao
AMC Co., Ltd.
Robbins Thomas
Shoei Printing Co., Ltd.
Sugarman Scott J.
LandOfFree
Method of legitimate product identification and seals and identi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of legitimate product identification and seals and identi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of legitimate product identification and seals and identi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1848234