Results 61 to 70 of about 44,997 (341)

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

Sensors, 2021
Microscopic structural rearrangements in expanding polylactide foams were probed using multiple dynamic scattering of laser radiation in the foam volume.
Dmitry Zimnyakov, Marina Alonova, Ekaterina Ushakova, Sergey Volchkov, Olga Ushakova, Daniil Klimov, Ilya Slavnetskov, Anna Kalacheva   +7 more
doaj   +1 more source

A narrow-band speckle-free light source via random Raman lasing

, 2015
Currently, no light source exists which is both narrow-band and speckle-free with sufficient brightness for full-field imaging applications. Light emitting diodes (LEDs) are excellent spatially incoherent sources, but are tens of nanometers broad. Lasers
Bixler, Joel N., Cao, Hui, Dyer, Phillip N., Hokr, Brett H., Noojin, Gary D., Redding, Brandon, Rockwell, Benjamin A., Schmidt, Morgan S., Scully, Marlan O., Thomas, Robert J., Yakovlev, Vladislav V.   +10 more
core   +1 more source

Monitoring spatially heterogeneous dynamics in a drying colloidal thin film [PDF]

, 2010
We report on a new type of experiment that enables us to monitor spatially and temporally heterogeneous dynamic properties in complex fluids. Our approach is based on the analysis of near-field speckles produced by light diffusely reflected from the ...
Berne B.J., Breugem A.J., F. Scheffold, Goodman J.W., Lenke R., Lindner P., P. Zakharov, Skipetrov S.E., Weitz D.A.   +8 more
core   +2 more sources

Speckles in laser Doppler perfusion imaging [PDF]

Optics Letters, 2006
We report on the quantitative influence of speckles in laser Doppler perfusion imaging. The influence of speckles on the signal amplitude and on the Doppler spectrum is demonstrated experimentally for particle suspensions with different scattering levels and various beam widths.
Rajan, V., Varghese, B., van Leeuwen, T. G., Steenbergen, W.   +3 more
openaire   +2 more sources

Application of laser speckle contrast imaging in laparoscopic surgery.

Biomedical Optics Express, 2019
Anastomotic leakage is a worldwide problem in gastrointestinal surgery which seems to be related to the state of microcirculation. Laser speckle contrast imaging (LSCI) could give surgeons insight in the state of microcirculation to attune the site of ...
W. Heeman, Klaas Dijkstra, C. Hoff, S. Koopal, Jean-Pierre E. N. Pierie, H. Bouma, E. C. Boerma   +6 more
semanticscholar   +1 more source

Adaptable Tile‐Based Pneumatic Origami through Structurally Coupled Localized Actuation

Advanced Engineering Materials, EarlyView.
This article presents tile‐based pneumatic origami structures with rigid tiles and flexible fabric creases, achieving adaptable properties including morphing shape, selective multistability, and tunable stiffness. Independently pressurized folding bladders at each crease enable structurally coupled localized actuation of origami structures.
Tiantian Li, Jonathan Luntz, Diann Brei
wiley   +1 more source

Efficient Process Development for Laser Powder Bed Fusion of a Soft‐Magnetic Metallic Glass Composite

Advanced Engineering Materials, EarlyView.
Iron‐based metallic glass alloys exhibit excellent soft‐magnetic properties, and unprecedented geometrical freedom in the design of soft‐magnetic metallic glass components is made possible by additive manufacturing. An efficient workflow for developing parameters for laser‐based powder bed fusion of a Fe‐based metallic glass alloy is presented along ...
Julia Löfstrand, Priyanka Saha, Vidhiaza Leviandhika, Urban Wiklund, Alexander Elsen, Carolin Zintel, Lena Thorsson, Petra E. Jönsson   +7 more
wiley   +1 more source

Speckle Noise Reduction via Linewidth Broadening for Planetary Laser Reflectance Spectrometers

Remote Sensing
The low obliquity of the Moon leads to challenging solar illumination conditions at the poles, especially for passive reflectance measurements aimed at determining the presence and extent of surface volatiles.
Daniel R. Cremons, Gregory B. Clarke, Xiaoli Sun   +2 more
doaj   +1 more source

Experimental study of the transport of coherent interacting matter-waves in a 1D random potential induced by laser speckle [PDF]

, 2006
We present a detailed analysis of the 1D expansion of a coherent interacting matterwave (a Bose-Einstein condensate) in the presence of disorder. A 1D random potential is created via laser speckle patterns.
A Aspect, A F Varón, Ando T, Boyer V, D Clément, Dorokhov O N, Fallani L Lye J E Guarrera V Fort C Inguscio M, Françon M, Goodman J W, Goodman J W, Goodman J W, Graham R Pelster A, J A Retter, L Sanchez-Palencia, Lifshits I M, Mézard M, Nagaoka Y, Newman C M, P Bouyer, Roth R, Sachdev S, Sanchez-Palencia L, Sanchez-Palencia L Gangardt D M Bouyer P Shlyapnikov G V Aspect A, van Tiggelen B, Zoller P Büchler H P Bloch I   +24 more
core   +2 more sources

Multimodal Mechanical Testing of Additively Manufactured Ti6Al4V Lattice Structures: Compression, Bending, and Fatigue

Advanced Engineering Materials, EarlyView.
In this experimental study, the mechanical properties of additively manufactured Ti‐6Al‐4V lattice structures of different geometries are characterized using compression, four point bending and fatigue testing. While TPMS designs show superior fatigue resistance, SplitP and Honeycomb lattice structures combine high stiffness and strength. The resulting
Klaus Burkart, Jonas Schmidt, Anastasiya Toenjes, Johanna Eisenträger   +3 more
wiley   +1 more source