Encoded badge holograms

Details Encoded badge holograms Encoded badge holograms

G - Physics

03

H

G03H 1/26 (2006.01) B42D 15/10 (2006.01) G03H 1/04 (2006.01) G03H 1/28 (2006.01) G06K 19/06 (2006.01)

Patent

CA 2130310

24 ENCODED BADGE HOLOGRAMS ABSTRACT OF THE DISCLOSURE An encoded hologram that produces a first image and a second image pursuant to playback illumination, wherein the first image is resolvable by human vision is resolvable by human vision while the second image is not resolvable by human vision when the playback illumination comprises non- coherent broad band illumination, and wherein the second image is machine readable when the hologram is illuminated with playback illumination that is based on the original reference beam.

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