BRAGG DIFFRACTING SECURITY MARKER

PROBLEM TO BE SOLVED: To provide a security device which can be applied to a paper base material or a plastic base material used for package of a retail article. SOLUTION: A method of marking an article with a watermark that diffracts radiation according to a Bragg's law is disclosed. The metho...

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Bibliographic Details
Main Authors MUNRO CALUM H, MERRITT MARK D, PURDY SEAN
Format Patent
LanguageEnglish
Published 12.05.2011
Subjects
BOOK COVERS
BOOKBINDING
CALCULATING
CINEMATOGRAPHY
COMPUTING
COUNTING
DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR
ELECTROGRAPHY
FILES
HANDLING RECORD CARRIERS
HOLOGRAPHIC PROCESSES OR APPARATUS
HOLOGRAPHY
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
SPECIAL PRINTED MATTER
TRANSPORTING
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Summary:PROBLEM TO BE SOLVED: To provide a security device which can be applied to a paper base material or a plastic base material used for package of a retail article. SOLUTION: A method of marking an article with a watermark that diffracts radiation according to a Bragg's law is disclosed. The method includes a step of applying a regular and periodic array of particles to the article in a configuration that marks the article. The watermark includes the regular and periodic array of particles fixed in a matrix. The watermark may change colors with a viewing angle, may disappear and reappear with another viewing angle or may diffract non-visible radiation that is detectable at a certain angle of detection. COPYRIGHT: (C)2011,JPO&INPIT
Bibliography:Application Number: JP20110017301