Falsification-proof identification card having a Lippmann-Bragg hologram

• US 4,171,766 A
• Filed: 02/22/1977
• Issued: 10/23/1979
• Est. Priority Date: 03/26/1976
• Status: Expired due to Term

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Ruell, Hartwig
• Primary Examiner(s): Cook, Daryl W.
• Application Number:
  US05/770,292
• Time in Patent Office: 973 Days
• Field of Search: 350/3.5, 350/3.6, 350/3.61, 235/61.12 N, 235/457, 235/487, 40/2.2, 283/7
• US Class Current: 235/487
• CPC Class Codes: B42D 2033/10 Metallic material
• CPC Class Codes: B42D 2033/28 Paper or card board
• CPC Class Codes: B42D 2035/02 Nature of the markings
• CPC Class Codes: B42D 2035/06 Picture of the user
• CPC Class Codes: B42D 2035/08 Alphanumerical data
• CPC Class Codes: B42D 2035/34 Markings visible under particular conditions or containing coded information
• CPC Class Codes: B42D 2035/50 Corresponding markings appearing in different shapes or at different places
• CPC Class Codes: B42D 25/23 Identity cards
• CPC Class Codes: B42D 25/318 Signatures
• CPC Class Codes: B42D 25/328 Diffraction gratings; Holograms
• CPC Class Codes: B42D 25/40 Manufacture
• CPC Class Codes: B42D 25/405 Marking
• CPC Class Codes: G03H 1/0011 for security or authentication holograms on information-bearing cards B42D25/328; testing papers with holograms G07D7/0032
• CPC Class Codes: G03H 1/0248 Volume holograms
• CPC Class Codes: G03H 1/0406 Image plane or focused image holograms, i.e. an image of the object or holobject is formed on, in or across the recording plane
• CPC Class Codes: G03H 1/28 superimposed holograms only
• CPC Class Codes: G03H 2001/0415 for recording reflection holograms
• CPC Class Codes: G03H 2001/0428 Image holography, i.e. an image of the object or holobject is recorded G03H1/0406 takes precedence; holographic microscope G03H2001/005
• CPC Class Codes: G03H 2210/20 2D object
• CPC Class Codes: G06K 19/16 the marking being a hologram or diffraction grating
• CPC Class Codes: G07F 7/086 : by passive credit-cards adapted therefor, e.g. constructive particularities to avoid counterfeiting, e.g. by inclusion of a physical or chemical security-layer for security documents G07D7/00; for the reading of record-carriers in general G06K7/00; for the design of coded credit-cards G06K19/10

Abstract

An identification card with a holographic security safeguard in the form of a large area Lippmann-Bragg hologram recorded on a layer or sheet-like carrier disposed on a face of the identification card, capable of being read out without the use of laser light, employing merely normal light sources which produce incoherent light, whereby an image can be observed with the naked eye, and which can contain both binary and analog information, comparable, for example, with printed and other information contained on the identification card; and a method of producing such a card.

Claims

1. An identification card with conventional, particularly printed information and with a holographic security safeguard, comprising a card body, at least one side of which is provided with a layer-like carrier and a Lippmann-Bragg hologram carried by said carrier, which hologram generally covers the entire rear face of the identification card body and contains items of security information, the front face of said card containing conventional identification information.

2. An identification card according to claim 1, wherein both analogue and binary information are recorded in the Lippmann-Bragg hologram.

3. An identification card according to claim 2, wherein the holographically recorded items of analogue information are identical with at least a portion of the conventional information carried by the card.