Results 1 to 10 of about 5,296,113 (405)
Speckle pattern processing by digital image correlation [PDF]
MATEC Web of Conferences, 2016 Testing the method of speckle pattern processing based on the digital image correlation is carried out in the current work. Three the most widely used formulas of the correlation coefficient are tested.
Gubarev Fedor +3 more
doaj +3 more sources
Hyperuniformity in amorphous speckle patterns [PDF]
Optics Express, 2018 Hyperuniform structures possess the ability to confine and drive light, although their fabrication is extremely challenging. Here we demonstrate that speckle patters obtained by a superposition of randomly arranged sources of Bessel beams can be used to ...
Ancora, Daniele +4 more
core +5 more sources
Laser vibrometry and the secret life of speckle patterns [PDF]
, 2008 Speckle patterns are produced when coherent light scatters from optically rough surfaces. In typical applications, a Laser Vibrometer collects a region of a speckle pattern on its photodetector.
Peter Martin (306678) +1 more
core +4 more sources
Sensors, 2021 The laser speckle correlation method has found widespread application for obtaining information from vibrating objects. However, the resolution and accuracy of the laser speckle correlation method as they relate to the defocusing degree have not been ...
Wenxin Hu +4 more
doaj +1 more source
Image-Enhanced Pseudo-Thermal Ghost Imaging with Hybrid Speckle Pattern
Photonics, 2023 In this study, the influence of hybrid speckle patterns on the contrast-to-noise ratio (CNR) and resolution in pseudo-thermal ghost imaging (PGI) was examined based on the object dimensions in the macroscopic and microscopic regimes.
Tong Tian +3 more
doaj +1 more source
Компьютерная оптика, 2021 A process of mode matching in a chaotic speckle pattern without a reference beam responsible for the formation of a holographic grating was studied experimentally and theoretically.
A.V. Volyar +3 more
doaj +1 more source
Superoscillation in speckle patterns [PDF]
Optics Letters, 2008 3 pages, two figures, Optics Letters ...
Dennis, M.R., Hamilton, A., Courtial, J.
openaire +6 more sources
Isotropically Polarized Speckle Patterns [PDF]
Physical Review Letters, 2015 5 pages, 3 ...
Mikolaj K. Schmidt +8 more
openaire +5 more sources
Speckle pattern analysis of security holograms and related foils for quality assessment and authentication. [PDF]
, 2022 A speckle pattern is produced by the mutual interference of a set of coherent wavefronts. Speckle patterns typically occur in diffuse reflections of monochromatic light such a laser light. When a rough surface is illuminated by a coherent light is imaged,
Ambadiyil, Sajan +3 more
core +2 more sources
Improvements of Computational Ghost Imaging by Using Sequenced Speckle
Applied Sciences, 2023 This study presents a computational ghost imaging (GI) scheme that utilizes sequenced random speckle pattern illumination. The primary objective is to develop a speckle pattern/sequence that improves computational time without compromising image quality.
Sukyoon Oh +3 more
doaj +1 more source