DIFFRACTIVE OPTICAL ELEMENT AND METHOD FOR THE DESIGN OF A DIFFRACTIVE OPTICAL ELEMENT
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United States of America Patent
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Mar 23, 2017
app pub date -
Sep 23, 2015
filing date -
Sep 23, 2015
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Abstract
A diffractive optical element (DOE) is designed to implement both a collimation function with respect to an input divergent beam and a beam shaping function with respect to an output divergent beam. The phase designs of the collimation function and the beam shaping function are independently produced in the phase domain. These phase designs are then combined using a phase angle addition of the individual functions and wrapped between 0 and 2π radians. The diffractive surface of the DOE is then defined from the wrapped phase angle addition of the individual functions.
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