Results 71 to 80 of about 3,712 (221)

Application of Noise2Inverse and adaptation (Noise2Phase) to single‐mask x‐ray phase contrast micro‐computed tomography

Journal of Microscopy, EarlyView.
Abstract X‐ray phase contrast imaging (XPCI), when implemented in micro‐computed tomography (micro‐CT) mode, offers high‐contrast 3D imaging of weakly‐attenuating material samples. In the so‐called single‐mask edge illumination approach, a mask with periodically spaced transmitting apertures is used to split the x‐ray beam into narrow beamlets; when ...
Khushal Shah, Grammatiki Lioliou, Dai Chen, Alexander Denker, Peter Munro, Marco Endrizzi, Alberto Astolfo, Alessandro Olivo, Charlotte K. Hagen   +8 more
wiley   +1 more source

Balanced detection for self-mixing interferometry to improve signal-to-noise ratio

, 2018
We apply balanced detection to self-mixing interferometry for displacement and vibration measurement, using two photodiodes for implementing a differential acquisition.
Michele Norgia, Li, Kun, Zhao, Changming, Changming Zhao, Kun Li, Norgia, Michele   +5 more
core   +1 more source

Global Wind Field Reconstruction in the Mesosphere and Lower Thermosphere (MLT) During Geomagnetic Storms by Fusing TIDI and SABER Data: A Generative Adversarial Network (GAN) Approach

Geoscience Data Journal, Volume 13, Issue 3, July 2026.
ABSTRACT The Mesosphere and Lower Thermosphere establish an essential connection between Earth's lower atmosphere and upper atmosphere because wind patterns essential for atmospheric movement also influence energy distribution and chemical movements during geomagnetic storms that disrupt satellite operations and space weather prediction systems.
Yunhao Si
wiley   +1 more source

Self-mixing interferometry system for in-vitro flow mapping of retinal arteriolar network

Micro and Nano Engineering
Self-Mixing Interferometry (SMI) is an optical sensing technique that enables the creation of compact, all-in-one optical sensors for high-resolution measurements, making it an attractive tool for flowmetry applications, such as velocity mapping in ...
Sebastián Sierra-Alarcón, Evelio E. Ramírez-Miquet, Julien Perchoux, Laureline Julien, Benoit Charlot, Adam Quotb   +5 more
doaj   +1 more source

Long-wave infrared FMCW ranging systems based on external coherent detection and self-mixing interferometry [PDF]

EPJ Web of Conferences
Long-wave infrared (LWIR) wavelengths are expected to provide a better robustness against meteorological perturbations as well as an increased covertness for hard target FMCW LiDAR. However, the implementation and modulation of LWIR sources and detectors
Martin Bruno, Feneyrou Patrick, Mignon Quentin LE, Gacemi Djamal, Berthou Nicolas, Martin Aude, Morvan Loïc, Sirtori Carlo   +7 more
doaj   +1 more source

Improved method for estimation of multiple parameters in self-mixing interferometry

Applied Optics, 2015
There are two categories of applications for self-mixing interference (SMI)-based sensing: (1) estimation of parameters associated with a semiconductor laser (SL) and (2) measurement of the metrological quantities of the external target. To achieve high resolution sensing, each category of applications requires knowledge from the other.
Gao, Yan, Yu, Yanguang, Xi, Jiangtao, Guo, Qinghua, Tong, Jun, Tong, Sheng   +5 more
openaire   +4 more sources

THz QCL self-mixing interferometry for biomedical applications [PDF]

SPIE Proceedings, 2014
In this paper, we introduce the self-mixing phenomenon in terahertz quantum cascade lasers (THz QCLs) and present recent advancements in the development of coherent THz imaging and sensing systems that exploit the self-mixing effect. We describe an imaging method which utilises the interferometric nature of optical feedback in a THz QCL to employ it as
Rakić, AD, Taimre, T, Bertling, K, Lim, YL, Wilson, SJ, Nikolić, M, Valavanis, A, Indjin, D, Linfield, EH, Davies, AG, Ferguson, B, Walker, G, Schaider, H, Soyer, HP   +13 more
openaire   +3 more sources

Roughness Measurements at Small and Uneven Surfaces of Ceramic Foam Filters

Surface and Interface Analysis, Volume 58, Issue 7, Page 471-490, July 2026.
ABSTRACT This study investigated the possibility of roughness characterization of ceramic foam filters using a laser scanning microscope, examining the influence of magnification, measured area, cutoff wavelength (λc), measured roughness parameter, and position within the ceramic foam on the measured roughness data. Firstly, the effect of magnification
Claudia Voigt, Hans Laus, Jana Hubálková, Christos G. Aneziris   +3 more
wiley   +1 more source

Self-Calibration Method for the Four Buckets Phase Demodulation Algorithm in Triangular Wave Hybrid Modulation

Applied Sciences
The four buckets phase demodulation method is a widely used sinusoidal modulation and demodulation technique in interferometry. Strict calibration is essential to minimize nonlinear errors in subsequent measurements. The core of the algorithm calibration
Qi Liu, Shanyong Chen, Tao Lai, Guiqing Li, Jiajun Lin, Junfeng Liu   +5 more
doaj   +1 more source

MSWD: A Hybrid Machine‐Learning Framework for Slant Wet Delay Modeling

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 12, 28 June 2026.
Abstract Space geodetic techniques such as Global Navigation Satellite Systems (GNSS) and Very Long Baseline Interferometry (VLBI) are limited by direction‐dependent tropospheric delays, with slant wet delay (SWD) being the most variable component and a major error source.
Zhenyi Zhang, Benedikt Soja
wiley   +1 more source