Fabrication process of multi-image type hologram, and multi-image type hologram fabricated by that process
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United States of America Patent
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Apr 7, 2015
Grant Date -
Aug 9, 2007
app pub date -
Dec 7, 2006
filing date -
Dec 13, 2005
priority date (Note) -
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Abstract
A process by which a multi-image type hologram, wherein one 3D image changes over to another depending on a viewing direction, can be fabricated in a simple construction, and a multi-image type hologram fabricated by that process. According to the process for the fabrication of a multi-image type hologram wherein one image changes over to another depending on a viewing direction, the area of a hologram recording material is divided into a plurality of sub-areas. Objects to be displayed on different images are holographically recorded in the respective sub-areas, using reference light having the same angle of incidence, images recorded in the respective sub-areas are simultaneously reconstructed from the recorded first-stage hologram, so that a second-stage hologram recording material is located near the reconstructed object images for recording them as a reflection or transmission type volume hologram.
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