HOLOGRAM-CARD AND CARD READER

PROBLEM TO BE SOLVED: To surely read the mechanically readable hologram.card, which is very hard for forgery and has a good secrecy protective capability, by providing the protective layer, which covers the rugged surface of the substrate, chemically coupling and in direct contact with the layer, to...

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Bibliographic Details
Main Authors ROBERT C TABER, ANNET C GROTT, JOHN S HACH
Format Patent
LanguageEnglish
Published 07.08.1998
Edition6
Subjects
ADVERTISING
BOOK COVERS
BOOKBINDING
CALCULATING
CINEMATOGRAPHY
COMPUTING
COUNTING
CRYPTOGRAPHY
DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR
DISPLAY
DISPLAYING
EDUCATION
ELECTROGRAPHY
FILES
GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
HANDLING RECORD CARRIERS
HOLOGRAPHIC PROCESSES OR APPARATUS
HOLOGRAPHY
LABELS OR NAME-PLATES
LOOSE LEAVES
MOVABLE-STRIP WRITING OR READING APPARATUS
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PERFORMING OPERATIONS
PHOTOGRAPHY
PHYSICS
PRESENTATION OF DATA
PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES
PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR
RECOGNITION OF DATA
RECORD CARRIERS
SEALS
SIGNS
SPECIAL PRINTED MATTER
TECHNICAL SUBJECTS COVERED BY FORMER USPC
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS
TRANSPORTING
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Summary:PROBLEM TO BE SOLVED: To surely read the mechanically readable hologram.card, which is very hard for forgery and has a good secrecy protective capability, by providing the protective layer, which covers the rugged surface of the substrate, chemically coupling and in direct contact with the layer, to the topographical features which constitute diffraction optical elements. SOLUTION: A mechanically readable hologram.card 100 having a good information protective capability generates a hologram.image in response to irradiation light beams. The card 100 is provided with a rugged surface 113 which include local topographic features 111 constituting diffraction optical elements. Moreover, a protective layer 117 is provided to cover a substrate 109 and the surface 113 and to be chemically coupled and in direct contact with topographic features 111 which constitute diffraction optical elements. When the elements are irradiated by the beams, a hologram.image is generated. Thus, the layer of the card 100 are difficult to peal off mechanically and chemically.
Bibliography:Application Number: JP19970339613