A METHOD AND DISPLAY APPARATUS FOR REDUCING HOLOGRAPHIC SPECKLE
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United States of America Patent
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Issued Date -
Jul 6, 2023
app pub date -
Jun 2, 2021
filing date -
Jun 3, 2020
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Abstract
A method and display apparatus for reducing holographic speckle when displaying holographic images are described. A target image (10) is decomposed into input images (11). A first input image includes higher spatial frequency components of the target image and is imaged using a first display method (12) to generate a first holographic display image. The second input image includes lower spatial frequency components of the target image and is imaged using a second display method (12) to generate a second display image. The first and second display images are combined for display to a user. The second display method (12) is adapted to reduce holographic speckle or include no holographic speckle compared to the first holographic display method (12) thereby reducing holographic speckle in the combined display image (13).
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