Results 261 to 270 of about 1,925,346 (295)
Some of the next articles are maybe not open access.
Sharp focusing by means of binary relief at the end of the optical fiber
Proceedings of SPIE, 2014Sharp focusing of homogeneously polarized fiber modes using the binary micro-relief at the output end of the optical fiber is numerically investigated by the FDTD method. The features of the application of sharp focusing for the input of laser modes in the fiber with a smaller diameter are defined.
Svetlana Khonina, Dmitry Savelyev
exaly +2 more sources
Focusing optical waves with a rotationally symmetric sharp-edge aperture
Optics Communications, 2018Abstract While there has been various kinds of patterned structures proposed for wave focusing, these patterned structures usually involve complicated lithographic techniques since the element size of the patterned structures should be precisely controlled in microscale or even nanoscale.
Shenhe Fu, Jianying Zhou, Yanwen Hu
exaly +2 more sources
A sharp-focusing schlieren optical deflectometer
31st Aerospace Sciences Meeting, 1993A new instrument capable of localized, nonintrusive turbulence measurements is developed by combining a focusing schlieren system with an optical deflectometer. This instrument records the fluctuating light intensity at a point in the focused schlieren image.
F. ALVI, G. SETTLES, L. WEINSTEIN
openaire +1 more source
Sector Metalens for Sharp Focusing of Laser Light
2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring), 2019In this paper we have investigated a 16-sector metalens fabricated in a thin film of amorphous silicon and consisting from a set of subwavelength binary diffractive gratings. The metalens converts linearly polarized incident light into an azimuthally polarized optical vortex and focuses it. Experimentally using scanning near-field optical microscope it
S. S. Stafeev +3 more
openaire +1 more source
Inertial focusing of particles and cells in the microfluidic labyrinth device: Role of sharp turns
Biomicrofluidics, 2022Inertial, size-based focusing was investigated in the microfluidic labyrinth device consisting of several U-shaped turns along with circular loops. Turns are associated with tight curvature and, therefore, induce strong Dean forces for separating particles; however, systematic studies exploring this possibility do not exist.
Anirudh Gangadhar, Siva A. Vanapalli
openaire +2 more sources
Sharp focusing of laser beams in anisotropic uniaxial crystals
Journal of Optical Technology, 2015This paper discusses the sharp focusing of homogeneously polarized laser beams in a uniaxial crystal. It is shown analytically and numerically that, when homogeneously polarized radiation is sharply focused along the axis of a crystal, two foci are formed, corresponding to the ordinary and extraordinary rays. The introduction of a vortex phase into the
S. N. Khonina +2 more
openaire +1 more source
Extraction and transport of sharp focused electron beam
Czechoslovak Journal of Physics, 2006The characteristics of the electron beam extracted from plasma sources based on hollow cathode were investigated by using computer code Kobra3-INP. It has been used to evaluate the extraction and acceleration systems in attempt to generate an electron beam with high current, high brightness and low divergence.
openaire +1 more source
Investigation of visualization characteristics of the sharp focusing schlieren method
ICIASF 2005 RecordInternational Congress onInstrumentation in AerospaceSimulation Facilities, 2006The schlieren method is most often used in the high speed wind tunnel testing as the flow visualization technique around the airfoil models etc. It is well known that the schlieren system is unable to obtain the three dimensional information occurring at various locations along the optical path.
M. Kashitani, Y. Yamaguchi
openaire +1 more source