Simplified scattering coefficient expressions for a spherical particle located on the propagation axis of a fifth‐order Gaussian beam

1989 ◽  
Vol 55 (26) ◽  
pp. 2709-2711 ◽  
Author(s):  
Scott A. Schaub ◽  
John P. Barton ◽  
Dennis R. Alexander
Keyword(s):  
Gaussian Beam ◽  
Spherical Particle ◽  
Scattering Coefficient ◽  
Propagation Axis ◽  
Fifth Order

Scattering Properties of Vectorial Far-Field Laguerre-Gaussian Beam by Single Spherical Particle

2018 ◽  
Vol 45 (6) ◽  
pp. 0605003
Author(s):  
徐强 Xu Qiang ◽  
李金刚 Li Jingang ◽  
王旭 Wang Xu ◽  
韩一平 Han Yiping ◽  
吴振森 Wu Zhensen
Keyword(s):  
Gaussian Beam ◽  
Spherical Particle ◽  
Far Field

Investigation of astigmatic Gaussian beam Z scan with simultaneous third- and fifth-order nonlinear refraction

Optik ◽  
2012 ◽  
Vol 123 (8) ◽  
pp. 744-747
Author(s):  
Shi-Zhuan Lu ◽  
Kai-Ming You ◽  
Deng-Yu Zhang ◽  
Feng Gao
Keyword(s):  
Gaussian Beam ◽  
Nonlinear Refraction ◽  
Fifth Order

Extension of the program 3D MMP with a fifth order Gaussian beam

1996 ◽  
Vol 32 (15) ◽  
pp. 1356 ◽  
Author(s):  
T. Evers ◽  
H. Dahl ◽  
T. Wriedt
Keyword(s):  
Gaussian Beam ◽  
Fifth Order

scholarly journals Gaussian Light Model in Brightfield Optical Projection Tomography

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Olli Koskela ◽  
Toni Montonen ◽  
Birhanu Belay ◽  
Edite Figueiras ◽  
Sampsa Pursiainen ◽  
...  
Keyword(s):  
Gaussian Beam ◽  
Radon Transform ◽  
Beam Model ◽  
Optical Projection Tomography ◽  
Reconstruction Process ◽  
Optical Projection ◽  
Propagation Axis ◽  
X Ray Computed ◽  
Inverse Radon Transform

Abstract This study focuses on improving the reconstruction process of the brightfield optical projection tomography (OPT). OPT is often described as the optical equivalent of X-ray computed tomography, but based on visible light. The detection optics used to collect light in OPT focus on a certain distance and induce blurring in those features out of focus. However, the conventionally used inverse Radon transform assumes an absolute focus throughout the propagation axis. In this study, we model the focusing properties of the detection by coupling Gaussian beam model (GBM) with the Radon transform. The GBM enables the construction of a projection operator that includes modeling of the blurring caused by the light beam. We also introduce the concept of a stretched GBM (SGBM) in which the Gaussian beam is scaled in order to avoid the modeling errors related to the determination of the focal plane. Furthermore, a thresholding approach is used to compress memory usage. We tested the GBM and SGBM approaches using simulated and experimental data in mono- and multifocal modes. When compared with the traditionally used filtered backprojection algorithm, the iteratively computed reconstructions, including the Gaussian models GBM and SGBM, provided smoother images with higher contrast.

Forces and torques exerted on a multilayered spherical particle by a focused Gaussian beam

1998 ◽  
Vol 155 (1-3) ◽  
pp. 169-179 ◽  
Author(s):  
Hubert Polaert ◽  
Gérard Gréhan ◽  
Gérard Gouesbet
Keyword(s):  
Gaussian Beam ◽  
Spherical Particle ◽  
Focused Gaussian Beam
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