Quantification of the effects of time-varying speckle patterns on speckle images using a modified speckle influence degree method

2020 ◽  
Vol 463 ◽  
pp. 125368
Author(s):  
Yuan Yuan ◽  
Yong Bi ◽  
Min Yuan Sun ◽  
Dong Dong Wang ◽  
Wei Nan Gao ◽  
...  
Keyword(s):  
Time Varying ◽  
Speckle Patterns ◽  
Influence Degree

scholarly journals Active dynamics of colloidal particles in time-varying laser speckle patterns

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Silvio Bianchi ◽  
Riccardo Pruner ◽  
Gaszton Vizsnyiczai ◽  
Claudio Maggi ◽  
Roberto Di Leonardo
Keyword(s):  
Colloidal Particles ◽  
Laser Speckle ◽  
Time Varying ◽  
Speckle Patterns

scholarly journals Speckle-Based Sensing of Microscopic Dynamics in Expanding Polymer Foams: Application of the Stacked Speckle History Technique

Sensors ◽  
2021 ◽  
Vol 21 (20) ◽  
pp. 6701
Author(s):  
Dmitry Zimnyakov ◽  
Marina Alonova ◽  
Ekaterina Ushakova ◽  
Sergey Volchkov ◽  
Olga Ushakova ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Temporal Dynamics ◽  
Time Varying ◽  
Polymer Foams ◽  
Structural Rearrangements ◽  
Nucleation Effect ◽  
Cell Nucleation ◽  
Speckle Patterns ◽  
Joint Mapping ◽  
Dynamic Scattering

Microscopic structural rearrangements in expanding polylactide foams were probed using multiple dynamic scattering of laser radiation in the foam volume. Formation and subsequent expansion of polylactide foams was provided by a rapid or slow depressurization of the “plasticized polylactide–supercritical carbon dioxide” system. Dynamic speckles induced by a multiple scattering of laser radiation in the expanding foam were analyzed using the stacked speckle history technique, which is based on a joint mapping of spatial–temporal dynamics of evolving speckle patterns. A significant decrease in the depressurization rate in the case of transition from a rapid to slow foaming (from 0.03 MPa/s to 0.006 MPa/s) causes dramatic changes in the texture of the synthesized stacked speckle history maps. These changes are associated with transition from the boiling dynamics of time-varying speckles to their pronounced translational motions and are manifested as significant slopes of individual speckle traces on the recovered stacked speckle history maps. This feature is interpreted in terms of the actual absence of a new cell nucleation effect in the expanding foam upon slow depressurization on the dynamic scattering of laser radiation.

Identification of vulnerable atherosclerotic plaque by analysis of time-varying laser speckle patterns

2004 ◽  
Author(s):  
Seemantini K. Nadkarni ◽  
Brett E. Bouma ◽  
Tina Helg ◽  
Milan Singh Minsky ◽  
Raymond Chan ◽  
...  
Keyword(s):  
Atherosclerotic Plaque ◽  
Laser Speckle ◽  
Time Varying ◽  
Vulnerable Atherosclerotic Plaque ◽  
Speckle Patterns

Optical measurement of sound using time-varying laser speckle patterns

2011 ◽  
Author(s):  
Terence S. Leung ◽  
Shihong Jiang ◽  
Jeremy Hebden
Keyword(s):  
Optical Measurement ◽  
Laser Speckle ◽  
Time Varying ◽  
Speckle Patterns

Time-varying Macroeconomic Risk of Real Estate Returns

2016 ◽  
Author(s):  
Felix Schindler ◽  
Bertram Steininger ◽  
Tim Kroencke
Keyword(s):  
Real Estate ◽  
Time Varying ◽  
Macroeconomic Risk ◽  
Real Estate Returns
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