Results 121 to 130 of about 234,282 (231)

Biophotonics Modalities for High-Resolution Imaging of Microcirculatory Tissue Beds Using Endogenous Contrast: A Review on Present Scenario and Prospects

open access: yesInternational Journal of Optics, 2011
The microcirculation is a complex system, and the visualization of microcirculation has great significance in improving our understanding of pathophysiological processes in various disease conditions, in both clinical and fundamental studies.
Hrebesh M. Subhash
doaj   +1 more source

Dual-Wavelength Laser Speckle Contrast Imaging (dwLSCI) Improves Chronic Measurement of Superficial Blood Flow in Hands

open access: yesSensors, 2017
Laser speckle contrast imaging (LSCI) has been widely used to determine blood flow and perfusion in biological tissues. The physical model of traditional LSCI ignores the effects of scattering property distribution in relation to speckle correlation time
Lingke Zhang   +6 more
doaj   +1 more source

Particle sizing in rocket motor studies utilizing hologram image processing [PDF]

open access: yes, 1987
A technique of obtaining particle size information from holograms of combustion products is described. The holograms are obtained with a pulsed ruby laser through windows in a combustion chamber.
Netzer, David, Powers, John
core   +1 more source

Investigasi Penggunaan Metode Laser Speckle Imaging (LSI) untuk Pengukuran Kadar Gula Darah

open access: yesJurnal Fisika, 2018
Telah dilakukan penelitian dalam menginvestigasi kadar gula darah menggunakan metode Laser speckle Imaging, yang merupakan pencitraan dari peristiwa interferensi cahaya yang mengenai permukaan yang kasar. Penelitian ini memberikan suatu solusi alternatif
Zulkarnain Zulkarnain, Minarni Shidiq
doaj   +1 more source

Harnessing speckle for a sub-femtometre resolved broadband wavemeter and laser stabilization

open access: yesNature Communications, 2017
The complex speckle pattern produced by coherent multiple scattering contains information about the incident light field, which has recently been used for imaging. Metzgeret al. use speckle to construct a wavemeter with sub-femtometre resolution which is
Nikolaus Klaus Metzger   +7 more
doaj   +1 more source

Imaging cold atoms with shot-noise and diffraction limited holography

open access: yes, 2014
We theoretically develop and experimentally demonstrate a holographic method for imaging cold atoms at the diffraction and photon shot noise limits. Aided by a double point source reference field, a simple iterative algorithm robustly removes the twin ...
Sobol, J. P., Wu, Saijun
core   +1 more source

Speckle Noise Reduction via Linewidth Broadening for Planetary Laser Reflectance Spectrometers

open access: yesRemote 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   +2 more
doaj   +1 more source

Hybrid correlation holography with a single pixel detector

open access: yes, 2017
The correlation holography reconstructs 3D objects as a distribution of two-point correlation of the random field detected by two dimensional detector arrays.
Singh, Rakesh Kumar
core   +1 more source

A Portable Compact System for Laser Speckle Correlation Imaging of Artworks Using Projected Speckle Pattern

open access: yesJournal of Imaging, 2020
Artworks have a layered structure subjected to alterations caused by various factors. The monitoring of defects at sub-millimeter scale may be performed by laser interferometric techniques.
Claudia Daffara, Elisa Marini
doaj   +1 more source

Imaging blood cells through scattering biological tissue using speckle scanning microscopy

open access: yes, 2013
Using optical speckle scanning microscopy [1], we demonstrate that clear images of multiple cells can be obtained through biological scattering tissue, with subcellular resolution and good image quality, as long as the size of the imaging target is ...
Psaltis, Demetri, Pu, Ye, Yang, Xin
core   +1 more source

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