Hologram identification device

Details Hologram identification device Hologram identification device

1983-03-16

1986-01-07

Arnold, Bruce Y.

Printed matter

Having revealable concealed information, fraud preventer or...

Utilizing electromagnetic radiation

283904, 350320, B42D 1500, G03H 118

Patent

active

045630240

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.

REFERENCES:
patent: 4171766 (1979-10-01), Ruell

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