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- W3035817812 abstract "In this Letter, we present single-pixel spiral phase contrast imaging that enables optical edge detection of both amplitude and phase objects. This technique utilizes single-pixel detection to directly acquire the Fourier spectrum of the edge-enhanced object by scanning spiral phase-encoded plane waves in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mi>k</mml:mi> </mml:math> -space. Experimentally, we exploit a digital micromirror device to simultaneously generate the plane wave and reference field for illuminating the object and scan the plane wave for spectrum sampling. During the process, four-step phase-shifting is adopted, and synchronized intensity measurements are made with a single-pixel detector. Applying an inverse Fourier transform to the obtained spectrum directly yields the edge information of objects. As a demonstration, digital and real objects are imaged, and results verify that isotropic edge detection can be achieved with our technique for both amplitude and phase objects." @default.
- W3035817812 created "2020-06-25" @default.
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- W3035817812 date "2020-07-14" @default.
- W3035817812 modified "2023-10-16" @default.
- W3035817812 title "Single-pixel spiral phase contrast imaging" @default.
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- W3035817812 doi "https://doi.org/10.1364/ol.396903" @default.
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