Importance

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Abstract

A reflection hologram is laminated or otherwise incorporated into the face of a magnetic-stripe credit card or other similar document. This is done to guard against counterfeiting of the document by transfering of information from the magnetic stripe or similar indicia that is not readily detectable by an operator or user of the card or document. The card is verified by inserting it into a reading device which, while reading the information on the magnetic stripe or other indicia, also illuminates the hologram, producing holographic images or spots at one or more pedetermined unique angles, so that the spots can be detected by light sensing devices. Absence of a reflection at the proper angle would immediately indicate, through sensing circuitry, that the card is of questionable validity. To render the system still more secure, the hologram can produce multiple reflective images to be detected at several predetermined positions either from a single point or from multiple points.

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First Claim