Method for making edge faded holograms
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United States of America Patent
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Jan 29, 1991
Grant Date -
N/A
app pub date -
Aug 31, 1989
filing date -
Aug 31, 1989
priority date (Note) -
Expired
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Abstract
A method of making edge-faded holograms. A holographic recording medium is masked to provide a medium having photo-sensitive and photo-desensitized pixel areas. The photosensitive areas of the masked recording medium are exposed with a holographic image, producing an edge-faded hologram. Both positive and negative image masks may be employed to implement the invention. In a specific embodiment of the invention, the number and/or density of the photo-desensitized pixel areas are arranged in a pattern with the number of desensitized pixel areas increasing with proximity to the edge of the medium. The method may be performed in a single frame procedure or may be performed as a continuous process utilizing a continuous strip of holographic recording medium.
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