The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 1981
Filed:
Mar. 05, 1979
Siemens Aktiengesellschaft, Berlin & Munich, DE;
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.