Results 261 to 270 of about 243,834 (314)

3D Terahertz Confocal Imaging with Chromatic Metasurface

Laser & Photonics Reviews
Terahertz confocal imaging allows 3D see‐through of a non‐metallic object with high resolution. Conventional methods acquiring 3D images of thick objects suffer from limited depth‐of‐field, constrained depth resolution, and/or inconsistent spatial ...
Xiaolong You, R. Ako, Sharath Sriram, W. Withayachumnankul   +3 more
semanticscholar   +1 more source

Chromatic- and geometric-aberration-corrected TEM imaging at 80 kV and 20 kV

Physical Review A, 2018
The interest in light-element nanomaterials stimulated the development of atomic-resolution low-voltage transmission electron microscopy. While geometric-aberration correction made high-resolution imaging at around 80-kV electron acceleration voltage ...
F. Börrnert, U. Kaiser
semanticscholar   +1 more source

Ocular chromatic aberration and age

Ophthalmic and Physiological Optics, 1991
The amount of longitudinal chromatic aberration in group of younger and older subjects is compared in three separate studies, using a laser speckle optometer. Badal optometers with monochromatic illumination. and monochromatic retinoscopy. No evidence is Found for any systematic change in chromatic aberration with age.
A, Morrell, H D, Whitefoot, W N, Charman
openaire   +2 more sources

Chromatic aberration electron monochromator

Review of Scientific Instruments, 1982
The performance of an electron monochromator based on the chromatic aberration of electrostatic lenses was investigated. A first approximation analysis of the monochromator’s operation is given. A prototype monochromator was built and tested to produce an electron beam of less than 25 MeV FWHM at 10−9A, with high stability and reproducibility.
R. Grisenti, A. Zecca
openaire   +1 more source

Chromatic Aberration

2009
  +6 more sources

Chromatic Aberration of Electrostatic Lenses

Nature, 1948
THE focal length of a three-aperture electrostatic lens follows from the general paraxial ray equation : where Φ is the potential along the axis (r = 0), and Φ0 is the acceleration voltage.
openaire   +2 more sources

Chromatic Aberrations

2022
openaire   +1 more source

Chromatic aberrations

2000
David A. Atchison, George Smith
openaire   +1 more source

Aberration Theory and Chromatic Aberration

Optical Engineering Science, 2020

semanticscholar   +1 more source

Chromatic Aberrations

2003
openaire   +2 more sources