Identification card with a hologram and a process for the production thereof
First Claim
1. An identification card provided with means for safeguarding against counterfeiting, said identification card including a substrate having a single layer of recording material uniformly provided thereon, visible information recorded on said single layer and a hologram recorded in a portion of the single layer, said hologram including information forming the means for safeguarding.
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Accused Products
Abstract
An identification card, which has an increased safeguard against counterfeiting, comprises both a hologram containing information and information which is visible recorded in a single layer of recording material disposed on a substrate. The card is produced by first recording the visible information on a layer and then recording a hologram in a portion of the layer. Since the hologram may include both the visible information of the card and information which is coded to be read only by a machine, the process for evaluating the hologram converts the reconstructed hologram into electrical signals by means of a vidicon. Then the signals, which correspond to the machine-readable coded information, are separated from the other signals and processed separately. A practical apparatus for recording the hologram on the card includes imaging optics for forming a demagnified real image of the overall view of the identification card and mirrors for reflecting the imaging beam path onto the portion of the card as an object wave for recording the hologram.
71 Citations
29 Claims
- 1. An identification card provided with means for safeguarding against counterfeiting, said identification card including a substrate having a single layer of recording material uniformly provided thereon, visible information recorded on said single layer and a hologram recorded in a portion of the single layer, said hologram including information forming the means for safeguarding.
- 19. A process for the production of an identification card having both a hologram and visible information recorded in a single continuous layer of recording material on a substrate, said process including the steps of first recording the visible information on the single layer of recording material and then subsequently recording the hologram on said single layer.
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23. A process for evaluating information contained in a hologram of an identification card which has a single layer on a substrate with both visible information recorded and a hologram recorded therein, said hologram including at least a portion of the visible information and machine-readable coded information, said process comprising applying a retrieval beam to reconstruct an image of the hologram, projecting the reconstructed image of the hologram on a vidicon, said vidicon converting the reconstructed hologram into electrical signals, applying the electrical signals corresponding to the visible information to a monitor for display, and delivering the electrical signals corresponding to the machine-readable coded information to a device having means for further evaluating said machine-readable information.
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24. An apparatus for recording a hologram on a single layer of recording material on a substrate of an identification card having visual information recorded in said layer, said apparatus including:
- imaging optics for producing a demagnified, real image of the visible information recorded on the card;
means for directing the imaging beam of the real image to form an object beam directed at a portion of the recording medium with the real, demagnified image being located at a distance from the single layer, said means including mirrors; and
means for generating a reference wave directed at the recording medium to interfere with the object beam to record the hologram. - View Dependent Claims (25, 26, 27, 28, 29)
- imaging optics for producing a demagnified, real image of the visible information recorded on the card;
Specification