TW260762B

An encoded hologram (11) that produces a first image (I1) and a second image (I2) pursuant to playback illumination is provided, wherein the first image (I1) is resolvable by human vision while the second image (I2) is not resolvable by human vision when the playback illumination comprises non-coher...

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Bibliographic Details
Main Authors UPPER, RICHARD B, MULDER, JERRY L
Format Patent
LanguageChinese
Published 21.10.1995
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
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:An encoded hologram (11) that produces a first image (I1) and a second image (I2) pursuant to playback illumination is provided, wherein the first image (I1) is resolvable by human vision while the second image (I2) is not resolvable by human vision when the playback illumination comprises non-coherent broad band illumination, and wherein the second image (I2) is machine readable when the hologram (11) is illuminated with playback illumination that is based on the original reference beam (PB2).
Bibliography:Application Number: TW199483107868