Systems and methods for improving resolution in lensless imaging
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United States of America Patent
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Mar 5, 2019
Grant Date -
Oct 19, 2017
app pub date -
Mar 14, 2017
filing date -
Apr 14, 2016
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Abstract
An optical phase grating produces an interference pattern rich in intensity and spatial-frequency information from the external scene. The grating includes an odd number of repeated sets of adjacent horizontal portions, separated by steps, that fill an area that radiates outward from a central region. At a given distance from the central region and within the area of the phase grating, each of the first horizontal portions is of a first width that differs from a second width of the adjacent second horizontal portions. The interference patterns produced by the grating can be processed to extract images and other information of interest about an imaged scene.
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