Non-diffractive beam generation with partially blocked annular beam in scattering media

2021 ◽  
Author(s):  
Alifu Xiafukaiti ◽  
Nofel Lagrosas ◽  
Tatsuo Shiina
Keyword(s):  
Scattering Media ◽  
Annular Beam ◽  
Beam Generation

Performance Analysis of Lunar Spacecraft Navigation Based on Inter-Satellite Link Annular Beam Antenna

2016 ◽  
Vol E99.B (4) ◽  
pp. 951-959
Author(s):  
Lei CHEN ◽  
Ke ZHANG ◽  
Yangbo HUANG ◽  
Zhe LIU ◽  
Gang OU
Keyword(s):  
Performance Analysis ◽  
Satellite Link ◽  
Annular Beam ◽  
Spacecraft Navigation

Impact of Scattering on Transfer of Radiation in Emitting, Absorbing, and Scattering Media

2002 ◽  
Vol 33 (3-4) ◽  
pp. 4
Author(s):  
M. L. German ◽  
E. P. Nogotov ◽  
V. P. Necrasov
Keyword(s):  
Scattering Media

Inquiry into the Processes of Electron Beam Generation in a Magnetron Gun with Secondary-Emission Cathode

1999 ◽  
Vol 53 (4-5) ◽  
pp. 144-149
Author(s):  
N. I. Ayzatsky ◽  
A. N. Dovbnya ◽  
V. V. Zakutin ◽  
N. G. Reshetnyak ◽  
V. P. Romas'ko ◽  
...  
Keyword(s):  
Electron Beam ◽  
Secondary Emission ◽  
Electron Beam Generation ◽  
Beam Generation ◽  
Emission Cathode

Imaging through Scattering Media with a Learning Based Prior

2020 ◽  
Vol 2020 (14) ◽  
pp. 306-1-306-6
Author(s):  
Florian Schiffers ◽  
Lionel Fiske ◽  
Pablo Ruiz ◽  
Aggelos K. Katsaggelos ◽  
Oliver Cossairt
Keyword(s):  
Optimization Problem ◽  
Autonomous Driving ◽  
Scattering Media ◽  
Photon Scattering ◽  
Point Spread ◽  
Spread Function ◽  
Radiative Transport Equation ◽  
Spatio Temporal ◽  
Transient Imaging

Imaging through scattering media finds applications in diverse fields from biomedicine to autonomous driving. However, interpreting the resulting images is difficult due to blur caused by the scattering of photons within the medium. Transient information, captured with fast temporal sensors, can be used to significantly improve the quality of images acquired in scattering conditions. Photon scattering, within a highly scattering media, is well modeled by the diffusion approximation of the Radiative Transport Equation (RTE). Its solution is easily derived which can be interpreted as a Spatio-Temporal Point Spread Function (STPSF). In this paper, we first discuss the properties of the ST-PSF and subsequently use this knowledge to simulate transient imaging through highly scattering media. We then propose a framework to invert the forward model, which assumes Poisson noise, to recover a noise-free, unblurred image by solving an optimization problem.

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