Holographic optical data storage medium
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United States of America Patent
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Mar 12, 1991
Issued Date -
N/A
app pub date -
Jun 10, 1988
filing date -
Aug 10, 1987
priority date (Note) -
Expired
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Abstract
A hologram is fabricated by opening a volume phase reflection hologram formed in a recording medium such as a positive photoresist. The opening occurs by forming a second hologram, such as an off-axis hologram, in the same recording medium. The opened hologram can be replicated in metal and the metal can be used to emboss the fringe pattern of the opened hologram into plastic. A full range of colors in the visible spectrum may be obtained by metallizing the embossed plastic structure and then by overcoating it with appropriate clear dielectric layers.
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