Multi-spectral holographic security marker, method for its manufacture and holographic security system

A multi-spectral holographic security marker is made by a novel method according to the invention involving a replay frequency shift to one or more final replay frequencies of a part or parts only of a recorded image plane volume hologram. The marker comprises an optional surface hologram and an ima...

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Bibliographische Detailangaben
Hauptverfasser:	RICHARDSON MARTIN JOHN, SMITH STEVEN L, BROWN STEPHEN CHRISTOPHER
Format:	Patent
Sprache:	eng
Schlagworte:	BOOK COVERS BOOKBINDING CINEMATOGRAPHY DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR ELECTROGRAPHY FILES HOLOGRAPHIC PROCESSES OR APPARATUS HOLOGRAPHY LOOSE LEAVES MOVABLE-STRIP WRITING OR READING APPARATUS PERFORMING OPERATIONS PHOTOGRAPHY PHYSICS PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR SPECIAL PRINTED MATTER TRANSPORTING
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