scholarly journals Image Transmission through Scattering Media Using Ptychographic Iterative Engine

2019 ◽  
Vol 9 (5) ◽  
pp. 849 ◽  
Author(s):  
Guowei Li ◽  
Wanqin Yang ◽  
Haichao Wang ◽  
Guohai Situ
Keyword(s):  
Memory Effect ◽  
Image Transmission ◽  
Field Of View ◽  
Range Limits ◽  
Scattering Media ◽  
Refractive Index Distribution ◽  
Scattering Layer ◽  
Index Distribution ◽  
Imaging Performance ◽  
Small Field Of View

Random scattering media prevent light information from directly transmitting through, them as the photons will deviate from their original propagation directions due to the inhomogeneity of the refractive index distribution in scattering media. Based on recent developed methods, light information transmission through scattering media is realized using a memory effect. However, the memory effect range limits it to a small field of view. To enlarge the field of view, in this article, we propose to use the ptychographic iterative engine to deliver information through scattering media. We experimentally demonstrate that the proposed method can deliver images beyond the memory effect range through the scattering layer with outstanding imaging performance.

scholarly journals Resolution Enhancement in Phase Microscopy: a Review

2018 ◽  
Author(s):  
Juanjuan Zheng ◽  
Vicente Micó ◽  
Peng Gao
Keyword(s):  
Degrees Of Freedom ◽  
Resolution Enhancement ◽  
Field Of View ◽  
Large Field ◽  
Phase Imaging ◽  
Structured Illumination ◽  
Refractive Index Distribution ◽  
Phase Microscopy ◽  
Index Distribution ◽  
Pros And Cons

Quantitative phase microscopy (QPM), a technique combining phase imaging and microscopy, enables visualization of the 3-D topography in reflective samples as well as the inner structure or refractive index distribution of transparent and translucent samples. However, as in conventional optical microscopy, QPM provides either a large field of view (FOV) or a high resolution but not both. Many approaches such as oblique illumination, structured illumination and speckle illumination have been proposed to improve the spatial resolution of phase microscopy by restricting other degrees of freedom (mostly time). Therefore, the space bandwidth product (SBP) of QPM becomes enlarged. This paper aims to provide an up-to-date review on the resolution enhancement approaches of QPM, discussing the pros and cons of each technique as well as the confusion on resolution definition claim on QPM and other coherent microscopy.

Very High Resolution Analysis of the Dynamics of a Coronal Plasmoid

1994 ◽  
Vol 144 ◽  
pp. 593-596
Author(s):  
O. Bouchard ◽  
S. Koutchmy ◽  
L. November ◽  
J.-C. Vial ◽  
J. B. Zirker
Keyword(s):  
High Resolution ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Field Of View ◽  
Small Field ◽  
High Resolution Analysis ◽  
Ccd Observations ◽  
Resolution Analysis ◽  
Very High ◽  
Small Field Of View

AbstractWe present the results of the analysis of a movie taken over a small field of view in the intermediate corona at a spatial resolution of 0.5“, a temporal resolution of 1 s and a spectral passband of 7 nm. These CCD observations were made at the prime focus of the 3.6 m aperture CFHT telescope during the 1991 total solar eclipse.

Improvement in imaging common temporal bone pathologies at 3 T MRI: small structures benefit from a small field of view

2017 ◽  
Vol 72 (3) ◽  
pp. 267.e1-267.e12 ◽  
Author(s):  
M. Schulze ◽  
K. Reimann ◽  
A. Seeger ◽  
U. Klose ◽  
U. Ernemann ◽  
...  
Keyword(s):  
Temporal Bone ◽  
Field Of View ◽  
Small Field ◽  
Small Field Of View
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