Results 281 to 290 of about 61,457 (342)

Revealing load hysteresis based on electronic speckle pattern interferometry and physical mesomechanics

, 2012
Toshio Sasaki, Sanichiro Yoshida
openalex   +1 more source

Upgrade of the Coherent X-ray Scattering beamline at Pohang Light Source II. [PDF]

J Synchrotron Radiat
Ham D, Nam D, Song C, Lee SY.
europepmc   +1 more source

Single-shot hyperspectral wavefront imaging. [PDF]

Nat Commun
Blochet B, Lebas N, Berto P, Papadopoulos D, Guillon M.   +4 more
europepmc   +1 more source

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Speckle pattern interferometer

Optics Communications, 1976
Abstract We describe in this paper a speckle interferometer constituted by two partially diffusing plates. They are illuminated by a laser and the resulting intensity distribution is observed in the image plane of the source. Each speckle of this plane (Fourier plane) is modulated by a ring system whose interference order depends on its phase.
Yves Dzialowski, Marie May
openaire   +1 more source

Deep speckle correlation: a deep learning approach toward scalable imaging through scattering media [PDF]

Optica, 2018
Imaging through scattering is an important yet challenging problem. Tremendous progress has been made by exploiting the deterministic input–output “transmission matrix” for a fixed medium.
Yunzhe Li, Yujia Xue, Lei Tian
exaly   +3 more sources

Statistics of stellar speckle patterns

Applied Optics, 1978
Photon-counting techniques have been applied to a study of the intensity fluctuations in the image of an unresolved star at the Cassegrain focus of the 91-cm telescope of the Royal Greenwich Observatory. Time-averaged temporal autocorrelation functions and moments of intensity have been computed.
R J, Scaddan, J G, Walker
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Heterodyne temporal speckle-pattern interferometry

Applied Optics, 2000
In temporal speckle-pattern interferometry deformation information is extracted by a Fourier transform technique from the speckle pattern that is recorded over a period of time as the object is deformed. A limitation of the experimental arrangements reported to date is that the direction of the deformation cannot be determined. We propose removing this
P, Haible, M P, Kothiyal, H J, Tiziani
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Digital speckle-pattern shearing interferometry

Applied Optics, 1980
An application of digital image processing techniques to speckle-shearing interferometry is described. A present system consists of an image-shearing camera using a Fresnel biprism of small angles and a digital TV-image processing facility. This interferometer makes it easy to measure in quasi-real-time spatial derivatives of surface displacement and ...
S, Nakadate, T, Yatagai, H, Saito
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Fringe scanning speckle-pattern interferometry

Applied Optics, 1985
Digital speckle-pattern interferometry systems for automatic measurement of deformations of a diffuse object are presented, which are based on a fringe scanning method with phase-shifted speckle interferograms. A digital speckle pattern before deformation of an object is recorded in the mass storage device of a computer facility.
S, Nakadate, H, Saito
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Supergrowth in speckle patterns

Optics Letters
Supergrowth occurs when the local amplitude growth rate of a wave is greater than that predicted by the band limit. While generating supergrowth on demand requires precise source modulation, we demonstrate that supergrowth occurs naturally in a sum of random plane waves.
Valeria Viteri-Pflucker, Christopher J. Ryan, Sethuraj K. R., Kevin Liang, David Spiecker, S. A. Wadood, Andrew N. Jordan, A. Nick Vamivakas   +7 more
openaire   +2 more sources