Non-local edge enhanced imaging with incoherent thermal light

2020 ◽  
Vol 116 (17) ◽  
pp. 174001
Author(s):  
Hanquan Song ◽  
Yingwen Zhang ◽  
Yuhang Ren ◽  
Zhidan Yuan ◽  
Dayu Zhao ◽  
...  
Keyword(s):  
Thermal Light ◽  
Non Local ◽  
Local Edge ◽  
Enhanced Imaging

Non-local correlation interference with pseudo-thermal light

2016 ◽  
Vol 381 ◽  
pp. 323-326
Author(s):  
Ling-Yu Dou ◽  
Lu Gao ◽  
Xin-Bing Song
Keyword(s):  
Local Correlation ◽  
Thermal Light ◽  
Non Local

SU-E-I-33: Low-Dose CBCT by Iterative Image Reconstruction Using Non-Local Edge-Preserving Prior

2011 ◽  
Vol 38 (6Part4) ◽  
pp. 3403-3403 ◽  
Author(s):  
J Wang ◽  
L Ouyang ◽  
W Lu ◽  
T Solberg
Keyword(s):  
Image Reconstruction ◽  
Low Dose ◽  
Iterative Image Reconstruction ◽  
Edge Preserving ◽  
Non Local ◽  
Local Edge

Non-local angular double-slit ghost diffraction with thermal light

2016 ◽  
Author(s):  
Lu Gao ◽  
Jiapeng. Zhao ◽  
Omar S. Magaña-Loaiza ◽  
Seyed Mohammad Hashemi Rafsanjani ◽  
Mohammad Mirhosseini ◽  
...  
Keyword(s):  
Thermal Light ◽  
Non Local ◽  
Double Slit

Linear Recursive Non-Local Edge-Aware Filter

2020 ◽  
pp. 1-1
Author(s):  
Penghui Bu ◽  
Hong Zhao ◽  
Yusheng Jin ◽  
Yueyang Ma
Keyword(s):  
Non Local ◽  
Local Edge

Toward High-Resolution Low-Voltage SEM

1988 ◽  
Vol 46 ◽  
pp. 218-219
Author(s):  
Zhifeng Shao
Keyword(s):  
Low Voltage ◽  
Spherical Aberration ◽  
Chromatic Aberration ◽  
Limiting Factor ◽  
Operating Voltage ◽  
Probe Radius ◽  
Non Local ◽  
Electron Microscopes ◽  
Image Position ◽  
Scanning Electron Microscopes

Recently, low voltage (≤5kV) scanning electron microscopes have become popular because of their unprecedented advantages, such as minimized charging effects and smaller specimen damage, etc. Perhaps the most important advantage of LVSEM is that they may be able to provide ultrahigh resolution since the interaction volume decreases when electron energy is reduced. It is obvious that no matter how low the operating voltage is, the resolution is always poorer than the probe radius. To achieve 10Å resolution at 5kV (including non-local effects), we would require a probe radius of 5∽6 Å. At low voltages, we can no longer ignore the effects of chromatic aberration because of the increased ratio δV/V. The 3rd order spherical aberration is another major limiting factor. The optimized aperture should be calculated as

Chromatic aberration and low-voltage SEM

1987 ◽  
Vol 45 ◽  
pp. 546-547
Author(s):  
Zhifeng Shao ◽  
A.V. Crewe
Keyword(s):  
Electron Energy ◽  
Low Voltage ◽  
Spherical Aberration ◽  
Chromatic Aberration ◽  
Primary Electron ◽  
Probe Size ◽  
Non Local ◽  
Optical Treatment ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes

For scanning electron microscopes, it is plausible that by lowering the primary electron energy, one can decrease the volume of interaction and improve resolution. As shown by Crewe /1/, at V0 =5kV a 10Å resolution (including non-local effects) is possible. To achieve this, we would need a probe size about 5Å. However, at low voltages, the chromatic aberration becomes the major concern even for field emission sources. In this case, δV/V = 0.1 V/5kV = 2x10-5. As a rough estimate, it has been shown that /2/ the chromatic aberration δC should be less than ⅓ of δ0 the probe size determined by diffraction and spherical aberration in order to neglect its effect. But this did not take into account the distribution of electron energy. We will show that by using a wave optical treatment, the tolerance on the chromatic aberration is much larger than we expected.

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