System, method and apparatus for polarization control
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United States of America Patent
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Jun 12, 2018
Issued Date -
Dec 11, 2014
app pub date -
Jun 4, 2014
filing date -
Jun 6, 2013
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Abstract
A polarization control device includes a first wave plate having a first surface profile and a second wave plate having a second surface profile complementary to the first surface profile. The optical axis of the first wave plate is orthogonal to the optical axis of the second wave plate. The first wave plate and the second wave plate are positioned to align the first surface profile with the second surface profile and maintain a constant thickness across the polarization control device. The first wave plate and the second wave plate may control polarization rotation as a continuous function of transverse position across a pupil plane of an optical system. The first wave plate and the second wave plate are separated by a sufficiently small distance so as to limit wave front distortion below a selected level.
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