Journal ArticleDOI
Experimental study of coherence vortices: local properties of phase singularities in a spatial coherence function.
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This work reports the first direct and quantitative experimental measurement of a generic coherence vortex, controlled by controlling the irradiance of an extended quasimonochromatic, spatially incoherent source.Abstract:
By controlling the irradiance of an extended quasimonochromatic, spatially incoherent source, an optical field is generated that exhibits spatial coherence with phase singularities, called coherence vortices. A simple optical geometry for direct visualization of coherence vortices is proposed, and the local properties and the spatial evolution of coherence vortex are experimentally investigated. To our knowledge, this is the first direct and quantitative experimental measurement of a generic coherence vortex.read more
Citations
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Journal Article
Fourier-transform method of fringe-pattern analysis for computer-based topography and interferometry
TL;DR: In this article, a fast Fourier transform method of topography and interferometry is proposed to discriminate between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour generation techniques.
Book ChapterDOI
Singular optics: optical vortices and polarization singularities
TL;DR: In this article, it was shown that the Poynting vector has features that are not immediately apparent from the intensity alone, nor from global properties of a beam, but can be easily recognized from the analysis of optical vortices and orbital angular momentum.
Journal ArticleDOI
Phase-space measurement and coherence synthesis of optical beams
TL;DR: In this article, spatial light modulators are used to create beams with locally varying spatial coherence, and the space and spatial frequency information of the beams can be measured simultaneously, and it is shown that the spatial and temporal frequency information can be estimated simultaneously.
Book ChapterDOI
The structure of partially coherent fields
Greg Gbur,Taco D. Visser +1 more
TL;DR: In this article, the authors provide an overview of recent advances, both theoretical and experimental, that have been made in a number of areas of optical coherence, including the introduction of the space-frequency representation of partially coherent fields, and an increased emphasis on the spatial coherence properties of wave fields.
Journal ArticleDOI
Fourier fringe analysis and its application to metrology of extreme physical phenomena: a review [Invited]
TL;DR: Examples include the measurement of extremely small magnetic fields with subfluxon sensitivity by electron wave interferometry, subnanometer wavefront evaluation of projection optics for extreme UV lithography, the detection of sub-Ångstrom distortion of a crystal lattice, and the measurements of ultrashort optical pulses in the femotsecond to attosecond range.
References
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Journal Article
Fourier-transform method of fringe-pattern analysis for computer-based topography and interferometry
TL;DR: In this article, a fast Fourier transform method of topography and interferometry is proposed to discriminate between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour generation techniques.
Journal ArticleDOI
Fourier-transform method of fringe-pattern analysis for computer-based topography and interferometry
TL;DR: In this paper, a fast Fourier transform method of topography and interferometry is proposed to discriminate between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour generation techniques.
Journal ArticleDOI
Dislocations in wave trains
John F. Nye,Michael V Berry +1 more
TL;DR: In this paper, it was shown that dislocations are to be expected whenever limited trains of waves, ultimately derived from the same oscillator, travel in different directions and interfere -for example in a scattering problem.
Journal ArticleDOI
Natural demodulation of two-dimensional fringe patterns. I. General background of the spiral phase quadrature transform.
TL;DR: A novel two-dimensional transform is developed in terms of two multiplicative operators: a spiral phase spectral (Fourier) operator and an orientational phase spatial operator that results in a meaningfulTwo-dimensional quadrature (or Hilbert) transform.
Journal ArticleDOI
Phase singularities in isotropic random waves
Michael V Berry,Mark R. Dennis +1 more
TL;DR: The singularities of complex scalar waves are their zeros; these are dislocation lines in space, or points in the plane as mentioned in this paper, and the singularities are their zero points.