Title:
【発明の名称】ホログラフィック安全保障システム
Document Type and Number:
Japanese Patent JPH0769947
Kind Code:
B2
Abstract:
PCT No. PCT/GB86/00109 Sec. 371 Date Oct. 30, 1986 Sec. 102(e) Date Oct. 30, 1986 PCT Filed Mar. 3, 1986 PCT Pub. No. WO86/05300 PCT Pub. Date Sep. 12, 1986.An identifiable security device comprises a carrier (1), such as a key card, credit card or document, supporting a thick film hologram (5) including at least one discrete reflective region (6) which, when illuminated reflects strongly in a specific, predetermined direction. A reader (2) incorporates a light source (7) and one or more photodiode detectors (8,11) arranged to detect the directional reflections, to discriminate against non-holographic reflections and to perform a security function on detection of appropriate reflections. The function may comprise authentication of a carrier bearing a simple hologram, but more complex hologram having a plurality of reflective regions arranged in a coded array are used, for example, on bank cheque cards to operate automatic bank dispensers and on pass cards for gaining entry to secure areas.
Inventors:
Heiden, Kenneth, Jiyoung
Application Number:
JP50144186A
Publication Date:
July 31, 1995
Filing Date:
March 03, 1986
Export Citation:
Assignee:
Roy William Nut
International Classes:
B42D15/02; B42D15/10; G06K1/12; G06K7/14; G06K17/00; G06K19/00; G06K19/06; G03H1/00; G06K19/10; G06K19/16; G07D7/12; G07D7/20; G07F7/08; (IPC1-7): G06K19/06; B42D15/10; G03H1/00; G06K1/12; G06K17/00; G07F7/08
Domestic Patent References:
| JPS54130950A | 1979-10-11 | |||
| JPS5282255A | 1977-07-09 | |||
| JP53108831B | ||||
| JPS584173A | 1983-01-11 | |||
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Attorney, Agent or Firm:
Aoki Akira (4 outside)
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