Results 51 to 60 of about 5,296,113 (405)
Multi-dimensional Assessment of Precision Machined Surface Texture Based on Laser Speckle Pattern Analysis [PDF]
, 2015 Surface texture of precision machined surfaces plays an important role in providing various functions to product surfaces. This paper presents a surface texture assessment method based on a laser speckle pattern analysis.
Sawano, Hiroshi +3 more
core +1 more source
Компьютерная оптика, 2021 The response of fiber specklegram sensors (FSSs) is given as function of variations in the intensity distribution of the modal interference pattern or speckle pattern induced by external disturbances.
J.D. Arango +6 more
doaj +1 more source
Singularities in Speckled Speckle: Screening [PDF]
, 2008 We study screening of optical singularities in random optical fields with two widely different length scales. We call the speckle patterns generated by such fields speckled speckle, because the major speckle spots in the pattern are themselves highly speckled.
arxiv +1 more source
Speckle engineering through singular value decomposition of the transmission matrix [PDF]
Phys. Rev. Lett. 127, 093903 (2021), 2020 Speckle patterns are ubiquitous in optics and have multiple applications for which the control of their spatial correlations is essential. Here, we report on a method to engineer speckle correlations behind a scattering medium through the singular value decomposition of the transmission matrix.
arxiv +1 more source
Langevin description of speckle dynamics in nonlinear disordered media
, 2002 We formulate a Langevin description of dynamics of a speckle pattern resulting from the multiple scattering of a coherent wave in a nonlinear disordered medium. The speckle pattern exhibits instability with respect to periodic excitations at frequencies $
A. Heidereich +18 more
core +4 more sources
Statistics of speckle patterns
, 2006 We develop a general method for calculating statistical properties of the speckle pattern of coherent waves propagating in disordered media. In some aspects this method is similar to the Boltzmann-Langevin approach for the calculation of classical fluctuations.
Agam, Oded, Andreev, A. V., Spivak, B.
openaire +2 more sources
Observation of Two-Photon Speckle Patterns
Physical Review Letters, 2010 We report the observation of speckle patterns in quantum correlations within light that is scattered by a disordered medium. The random medium is illuminated with spatially entangled photon pairs, and fourth-order speckle patterns are spatially resolved by two independently scanning detectors. Spatial entanglement gives two-photon speckle a much richer
Peeters W.H. +2 more
openaire +4 more sources
Singularities in Speckled Speckle: Statistics [PDF]
, 2008 Random optical fields with two widely different correlation lengths generate far field speckle spots that are themselves highly speckled. We call such patterns speckled speckle, and study their critical points (singularities and stationary points) using analytical theory and computer simulations.
arxiv +1 more source
Deep-learned speckle pattern and its application to ghost imaging [PDF]
arXiv, 2021 In this paper, we present a method for speckle pattern design using deep learning. The speckle patterns possess unique features after experiencing convolutions in Speckle-Net, our well-designed framework for speckle pattern generation. We then apply our method to the computational ghost imaging system.
arxiv
Speckle Reduction in Projection Systems [PDF]
, 2009 A speckle pattern is a quasi-random interference pattern which typically emerges when lasers are used as illumination sources in projection applications and which severely degrades the image quality.
Riechert, Falko
core +2 more sources