Printed matter – Maps
Patent
1989-01-23
1990-05-01
Bovernick, Rodney B.
Printed matter
Maps
283 86, 283 91, G03H 102
Patent
active
049213199
ABSTRACT:
A replica hologram structure wherein an information carrying relief pattern on one surface of the hologram is not metallized for reflection, as is the usual case, but rather air between the hologram and a supporting substrate causes incident light to be reflected from the surface relief pattern, thereby to form a reconstruction of an image or other light pattern. The surface relief pattern may be positioned immediately against the substrate, or, alternatively, held apart from it by spacers. The hologram and substrate are held together by any of a wide variety of mechanisms, including adhesive, welding and static electricity, in a manner that does not interfere with the reconstruction or viewing of the image or other light pattern from the hologram. Such a hologram structure has a use in product packaging and other applications where it is desired to be able to look through the hologram as well as be able to view the image or other light pattern reconstructed from it by reflection.
REFERENCES:
patent: 3689346 (1972-09-01), Rowland
patent: 3922065 (1975-11-01), Schultz
patent: 3924929 (1975-12-01), Holmen et al.
patent: 4119361 (1978-10-01), Greenaway
patent: 4582389 (1986-04-01), Wood et al.
patent: 4610499 (1986-09-01), Chern et al.
patent: 4726706 (1988-02-01), Attar
American Bank Note Holographics, Inc.
Bovernick Rodney B.
Ryan J. Patrick
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