METHOD OF DUPLICATING A HOLOGRAM AND HOLOGRAM OPTICAL ELEMENT
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United States of America Patent
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Sep 12, 2024
app pub date -
Jun 10, 2022
filing date -
Jun 15, 2021
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Abstract
Here discloses a method for duplicating a hologram and a hologram optical element. The method comprises: preparing a master with a master hologram; preparing a sample with coated photoalignment material layer above the master; and irradiating a recording light through the sample to the master, so that at least one portion of the recording light is reflected by the master as an object light carrying the master hologram information, and so that the object light and the recording light are interfered at the photoalignment material layer to produce a duplicated hologram in the photoalignment material layer.
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