Variable aberration correction using axially translating phase plates

1999 ◽  
Author(s):  
Thomas A. Mitchell ◽  
Jose M. Sasian
Keyword(s):  
Aberration Correction ◽  
Phase Plates

Photoinduced AsSeS thin film phase plates as adaptive optics mirrors for eye aberration correction

2008 ◽  
Author(s):  
S. Fomins ◽  
M. Reinfelde ◽  
A. Larichev ◽  
N. Iroshnikov ◽  
A. Gerbreders ◽  
...  
Keyword(s):  
Thin Film ◽  
Adaptive Optics ◽  
Aberration Correction ◽  
Phase Plates

Conformal dome aberration correction with counter-rotating phase plates

1999 ◽  
Author(s):  
James P. Mills ◽  
Scott W. Sparrold ◽  
Thomas A. Mitchell ◽  
Kenneth S. Ellis ◽  
David J. Knapp ◽  
...  
Keyword(s):  
Aberration Correction ◽  
Phase Plates

Characteristics of an Electrostatic Phase Plate

1972 ◽  
Vol 30 ◽  
pp. 618-619
Author(s):  
William Krakow ◽  
Benjamin Siegel
Keyword(s):  
Phase Contrast ◽  
Objective Lens ◽  
Phase Plate ◽  
Net Charge ◽  
Phase Plates ◽  
Beam Currents ◽  
Contrast Image ◽  
Bright Phase ◽  
Additional Phase Shift ◽  
Additional Phase

Unwin has used a metallized non-conducting thread in the back focal plane of the objective lens that stops out a portion of the unscattered beam, takes on a localized positive charge and thus produces an additional phase shift to give a different transfer function of the lens. Under the particular conditions Unwin used, the phase contrast image was shifted to bright phase contrast for optimum focus.We have investigated the characteristics of this type of electrostatic phase plate, both analytically and experimentally, as functions of the magnitude of charge and defocus. Phase plates have been constructed by using Wollaston wire to mount 0.25μ diameter platinum wires across apertures ranging from 50 to 200μ diameter and vapor depositing SiO and gold on the mounted wires to give them the desired charging characteristics. The net charge was varied by adjusting only the bias on the Wehnelt shield of the gun, and hence the beam currents and effective size of the source.

scholarly journals High-Q photonic chip-based temporal phase plates for electron microscopy

2021 ◽  
Vol 27 (S1) ◽  
pp. 3132-3133
Author(s):  
Armin Feist ◽  
Arslan Sajid Raja ◽  
Jan-Wilke Henke ◽  
Junqiu Liu ◽  
Germaine Arend ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
High Q ◽  
Temporal Phase ◽  
Phase Plates

Low-order aberration correction of the TMT tertiary mirror prototype based on a warping harness

2018 ◽  
Vol 57 (7) ◽  
pp. 1662 ◽  
Author(s):  
Linchu Han ◽  
Chengzhi Liu ◽  
Cunbo Fan ◽  
Zhenwei Li ◽  
Jingxu Zhang ◽  
...  
Keyword(s):  
Aberration Correction ◽  
Low Order

scholarly journals Formation of Inverse Energy Flux in the Case of Diffraction of Linearly Polarized Radiation by Conventional and Generalized Spiral Phase Plates

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 283
Author(s):  
Andrey Ustinov ◽  
Svetlana Khonina ◽  
Alexey Porfirev
Keyword(s):  
Energy Flux ◽  
Poynting Vector ◽  
Numerical Study ◽  
Longitudinal Component ◽  
Light Fields ◽  
Linearly Polarized ◽  
Linearly Polarized Radiation ◽  
Phase Plates ◽  
Spiral Phase ◽  
Polarized Radiation

Recently, there has been increased interest in the shaping of light fields with an inverse energy flux to guide optically trapped nano- and microparticles towards a radiation source. To generate inverse energy flux, non-uniformly polarized laser beams, especially higher-order cylindrical vector beams, are widely used. Here, we demonstrate the use of conventional and so-called generalized spiral phase plates for the formation of light fields with an inverse energy flux when they are illuminated with linearly polarized radiation. We present an analytical and numerical study of the longitudinal and transverse components of the Poynting vector. The conditions for maximizing the negative value of the real part of the longitudinal component of the Poynting vector are obtained.

Spherical aberration correction for two-photon recorded monolithic multilayer optical data storage

2002 ◽  
Author(s):  
Edwin P. Walker ◽  
Jacques Duparre ◽  
Haichuan Zhang ◽  
Wenyi Feng ◽  
Yi Zhang ◽  
...  
Keyword(s):  
Data Storage ◽  
Spherical Aberration ◽  
Optical Data Storage ◽  
Optical Data ◽  
Aberration Correction ◽  
Two Photon
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