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Rotating point spread function via pupil-phase engineering
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DOI：10.1364/OL.38.000585.png)
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A simple approach based on the use of a properly designed pupil-phase profile can yield a 3D point-spread function (PSF) that rotates with changing defocus, while keeping its transverse shape approximately invariant over +/- 3-4 waves of defocus. Unlike Gauss-Laguerre mode-based approaches, it generalizes readily for encoding spherical aberration too via PSF rotation. (C) 2013 Optical Society of America
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ORBITAL ANGULAR-MOMENTUM
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3.3
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4.0W
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7.6W
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