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Statements

Subject Item
dbr:Fourier_ptychography
rdf:type
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Fourier ptychography
rdfs:comment
Fourier ptychography is a computational imaging technique based on optical microscopy that consists in the synthesis of a wider numerical aperture from a set of full-field images acquired at various coherent illumination angles,resulting in increased resolution compared to a conventional microscope. Fourier ptychography reconstructs the complex image of the object (with quantitative phase information), but contrary to holography, it is a non-interferometric imaging technique and thus often easier to implement.
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n9:Optical_setup_for_Fourier_ptychography.png
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dbc:Microscopy dbc:Imaging
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1086345619
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dbr:Pupil_function dbr:Dark-field_microscopy dbr:Convex_optimization dbr:Synthetic-aperture_radar dbr:Diffraction-limited_system dbr:Coherent_diffraction_imaging dbr:Gerchberg–Saxton_algorithm dbc:Microscopy dbr:Phase_(waves) dbr:Condenser_(optics) dbr:Numerical_aperture dbr:Oil_immersion dbr:Triptych dbr:Diffraction_pattern dbr:Diffraction_tomography n8:Optical_setup_for_Fourier_ptychography.png dbr:Holography dbr:Tomographic_reconstruction dbr:Aperture dbr:Computational_imaging dbr:Ptychography dbr:Focal_plane dbc:Imaging dbr:Phase_retrieval dbr:Angular_spectrum_method dbr:Phase_problem dbr:Coherence_(physics) dbr:Field_of_view dbr:Optical_microscopy dbr:Depth_of_focus dbr:Bright-field_microscopy dbr:Objective_(optics)
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dbo:abstract
Fourier ptychography is a computational imaging technique based on optical microscopy that consists in the synthesis of a wider numerical aperture from a set of full-field images acquired at various coherent illumination angles,resulting in increased resolution compared to a conventional microscope. Each image is acquired under the illumination of a coherent light source at various angles of incidence (typically from an array of LEDs); the acquired image set is then combined using an iterative phase retrieval algorithm into a final high-resolution image that can contain up to a billion pixels (a gigapixel) with diffraction-limited resolution, resulting in a high space-bandwidth product. Fourier ptychography reconstructs the complex image of the object (with quantitative phase information), but contrary to holography, it is a non-interferometric imaging technique and thus often easier to implement. The name "ptychography" comes from the ancient Greek word πτυχή ("to fold", also found in the word triptych), because the technique is based on multiple "views" of the object.
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