Results 11 to 20 of about 55,390 (274)

Two-dimensional electron beam size measurements with x-ray heterodyne near field speckles

Physical Review Accelerators and Beams, 2022
In this paper we report on recent two-dimensional (2D) electron beam size measurements with a nonconventional synchrotron radiation interferometric technique based on x-ray heterodyne near field speckles (HNFS).
M. Siano, B. Paroli, M. A. C. Potenza, L. Teruzzi, U. Iriso, A. A. Nosych, E. Solano, L. Torino, D. Butti, A. Goetz, T. Lefevre, S. Mazzoni, G. Trad   +12 more
doaj   +1 more source

Optical Turbulence Profile in Marine Environment with Artificial Neural Network Model

Remote Sensing, 2022
Optical turbulence strongly affects different types of optoelectronic and adaptive optics systems. Systematic direct measurements of optical turbulence profiles [Cn2(h)] are lacking for many climates and seasons, particularly in marine environments ...
Cuicui Bi, Chun Qing, Pengfei Wu, Xiaomei Jin, Qing Liu, Xianmei Qian, Wenyue Zhu, Ningquan Weng   +7 more
doaj   +1 more source

Propagation of Correlation Singularities of a Partially Coherent Laguerre–Gaussian Electromagnetic Beam in a Uniaxial Crystal

IEEE Photonics Journal, 2017
The correlation singularities of a partially coherent Laguerre–Gaussian (LG) electromagnetic beam in a uniaxial crystal is shown to possess interesting evolution behavior. The analytical formula for the cross-spectral density matrix of a partially
Yongtao Zhang, Liuzhan Pan, Yangjian Cai
doaj   +1 more source

Self-Healing Properties of Partially Coherent Schell-Model Beams

IEEE Photonics Journal, 2017
Convolution expression for partially coherent beams that are partially blocked by an opaque obstacle is derived in detail in a paraxial $ABCD$ optical system.
Gaofeng Wu, Xiaoyan Pang
doaj   +1 more source

Femtosecond Resolution Experiments at Third-Generation Light Sources: a Concept Based on the Statistical Properties of Synchrotron Radiation [PDF]

, 2002
The paper describes a new concept of visible pump/X-ray probe/slow detector experiments that could be performed at third-generation synchrotron light sources.
E.A. Schneidmiller, E.L. Saldin, Goodman, M.V. Yurkov, Rousse   +4 more
core   +3 more sources

Correlation of Intensity Fluctuations for Scattering of a Partially Coherent Plane-Wave Pulse

Applied Sciences, 2019
We derived analytical expressions for the correlation of intensity fluctuations of a partially coherent Gaussian Schell-model plane-wave pulse scattered by deterministic and random media.
Yongtao Zhang, Chaoliang Ding, Liuzhan Pan, Yangjian Cai   +3 more
doaj   +1 more source

Progression of Early Glaucomatous Damage: Performance of Summary Statistics From Optical Coherence Tomography and Perimetry

Translational Vision Science & Technology, 2023
Performance comparison of optical coherence tomography (OCT) and visual field (VF) summary metrics for detecting glaucomatous progression.Thirty healthy control eyes (mean deviation [MD], -1.25 ± 2.03; pattern standard deviation [PSD] , 1.78 ± 0.77) and 91 patient eyes comprised of 54 glaucoma patients and 37 glaucoma suspects (MD, -1.58 ± 1.96; PSD, 2.
Tsamis, Emmanouil, La Bruna, Sol, Rai, Anvit, Leshno, Ari, Grossman, Jennifer, Cioffi, George, Liebmann, Jeffrey M., De Moraes, Carlos Gustavo, Hood, Donald C.   +8 more
openaire   +2 more sources

Spatial-Temporal Self-Focusing of Partially Coherent Pulsed Beams in Dispersive Medium

Applied Sciences, 2019
Partially coherent pulsed beams have many applications in pulse shaping, fiber optics, ghost imaging, etc. In this paper, a novel class of partially coherent pulsed (PCP) sources with circular spatial coherence distribution and sinc temporal coherence ...
Zhiguo Zhao, Chaoliang Ding, Yongtao Zhang, Liuzhan Pan   +3 more
doaj   +1 more source

Detection of Early Glaucomatous Damage: Performance of Summary Statistics From Optical Coherence Tomography and Perimetry

Translational Vision Science & Technology, 2022
To evaluate the diagnostic performance of optical coherence tomography (OCT) and visual field (VF) summary statistics (metrics) that are available in OCT and VF reports.OCT disc and macular scans and 24-2 and 10-2 VFs were obtained from 56 healthy control (HC) eyes/participants and 61 eyes/patients with 24-2 mean deviation of better than -6 dB.
Tsamis, Emmanouil, La Bruna, Sol, Leshno, Ari, De Moraes, Carlos Gustavo, Hood, Donald   +4 more
openaire   +2 more sources

Generating electromagnetic Schell-model sources using complex screens with spatially varying auto- and cross-correlation functions

Results in Physics, 2019
We present a method to generate any physically realizable electromagnetic Schell-model source. Our technique can be directly implemented on existing vector-beam generators that utilize spatial light modulators for coherence control, beam shaping, and ...
Milo W. Hyde, IV
doaj   +1 more source