Results 41 to 50 of about 454,356 (195)

Relativistic Scattering in the Funnel of Cygnus X-3

open access: yesThe Astrophysical Journal
Cygnus X-3 presents significant challenges to standard accretion models. Recent polarimetric observations by X-ray Polarimetry Explorer reveal high polarization degrees in the hard state (∼23%) and unexpectedly significant polarization in the soft state (
Suraj K. Chaurasia   +2 more
doaj   +1 more source

High-efficiency RGB achromatic liquid crystal diffractive optical elements

open access: yesOpto-Electronic Advances
Liquid crystal Pacharatnam-Berry phase optical elements (PBOEs) have found promising applications in augmented reality and virtual reality because of their slim formfactor, lightweight, and high optical efficiency. However, chromatic aberration remains a
Yuqiang Ding   +4 more
doaj   +1 more source

On the Non-Paraxial Diffraction of the Set of All Possible Stigmatic Pairs of Mirrors

open access: yesPhotonics
We present a comprehensive vector diffraction analysis of stigmatic pairs of mirrors derived from closed-form equations that describe all possible aplanatic two-mirror systems.
Rafael G. González-Acuña
doaj   +1 more source

Polarization ray tracing and polarization aberration compensation in reflective, astronomical telescopes [PDF]

open access: yesOptical Modeling and Performance Predictions X, 2018
Assessing and optimizing polarization performance in the context of ray-based optical design can be challenging. We describe an approach to this problem that decouples polarization effects from optical system geometry for reflective systems.
Derek Sabatke   +2 more
openaire   +1 more source

Polarization Independent Achromatic Meta-Lens Designed for the Terahertz Domain

open access: yesFrontiers in Physics, 2020
In recent years, metasurface-based focusing elements have gradually become an indispensable type of terahertz lenses. However, the meta-lens often suffers from chromatic aberration due to the intrinsic dispersion of each element, especially in the ...
Yufei Gao   +7 more
doaj   +1 more source

Research of the polarization aberration on Smith prism

open access: yesPhysics Procedia, 2011
AbstractUsing the law of refraction and reflection of vector form to trace the light direction of propagation in the Smith prism. Be based on it, get the reflection phase shifter δs and δp on every planes, consequently obtain virtue matrix using Jones vector. The distribution of the polarization state of emergent light wave from Smith prism is analyzed
Jinjun, Lu   +3 more
openaire   +1 more source

Polarization aberrations of electrically tunable liquid crystal mirrors

open access: yesOptics Express, 2020
Curved mirrors are able to fold optical paths and play important roles in compact optical systems in general. In this paper, we investigate the polarization aberrations of electrically tunable liquid crystal (LC) mirrors with two kinds of configurations (flat and curved ones). The LC mirrors exhibit spatially-continuous tunable wavefronts. The detailed
Yu-Jen Wang   +3 more
openaire   +2 more sources

Aberration-free three dimensional micromachining in glass with spatiotemporally shaped femtosecond laser pulses

open access: yes, 2018
We observe that focusing a femtosecond laser beam simultaneously chirped in time and space domains in glass can efficiently suppress the optical aberration caused by the refractive index mismatch at the interface of air and the glass sample.
Wei Chu (2008030)   +7 more
core   +1 more source

Prolactin/Jak2 directs apical/basal polarization and luminal linage maturation of mammary epithelial cells through regulation of the Erk1/2 pathway

open access: yesStem Cell Research, 2015
Tissue development/remodeling requires modulations in both cellular architecture and phenotype. Aberration in these processes leads to tumorigenesis.
Fengming Liu   +5 more
doaj   +1 more source

Aberration-free calibration for 3D single molecule localization microscopy

open access: yes, 2017
We propose a straightforward sample-based technique to calibrate the axial detection in 3D single molecule localization microscopy (SMLM). Using microspheres coated with fluorescent molecules, the calibration curves of PSF-shaping- or intensity-based ...
Clément Cabriel (17502168)   +3 more
core   +1 more source

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