Results 321 to 330 of about 7,907,205 (365)

Refractive multi-focus optics for material processing

, 2016
Splitting of radiation from high power multimode fiber coupled and fiber lasers in separate focused spots is important in several laser applications. Welding, cladding with 0.5-2 mm size working spots benefit from “inverse-Gauss” intensity profiles, and ...
A. Laskin, J. Volpp, V. Laskin, Aleksei Ostrun   +3 more
semanticscholar   +1 more source

Varifocal Occlusion-Capable Optical See-through Augmented Reality Display based on Focus-tunable Optics

IEEE Transactions on Visualization and Computer Graphics, 2019
Optical see-through augmented reality (AR) systems are a next-generation computing platform that offer unprecedented user experiences by seamlessly combining physical and digital content.
Kishore Rathinavel, Gordon Wetzstein, H. Fuchs   +2 more
semanticscholar   +1 more source

Optical antennas focus in on biology [PDF]

Nature Photonics, 2008
Biological processes often involve multimolecular interactions on a nanometre scale or at very large molecular concentrations, making them difficult to visualize. Optical antennas have the potential to become powerful tools for nanobioimaging by enhancing optical fields on this tiny scale.
openaire   +1 more source

Extended depth-of-focus technology in intraocular lenses.

Journal of cataract and refractive surgery, 2020
The extended depth-of-focus (EDOF) intraocular lens (IOL) is an emerging technology that is designed to improve range of vision, especially at intermediate distances.
T. Kohnen, R. Suryakumar
semanticscholar   +1 more source

Focus vernier for optical lithography

SPIE Proceedings, 1993
As the depth of focus of optical steppers grows smaller, it becomes more important to determine the position of best focus accurately and quickly. This paper describes the use of phase-shifted mask technology to form a focus vernier: a phase pattern on the stepper reticle which, when imaged in resist, can give both the magnitude and the direction of ...
Uwe Hollerbach, Eytan Barouch, William H. Arnold, Steven A. Orszag   +3 more
openaire   +2 more sources

Focus Sensing Optical Profilometer

SPIE Proceedings, 1989
Abstract A high sensitivity focus sensing configuration is employed in the construction of an accurateoptical profilometer. The system is analyzed theoretically and experimental investigation indicates a sensitivity better than 3nm with a linear dynamic range of 50pm.
Gregory Toker, Andrei Brunfeld, Joseph Shamir   +2 more
openaire   +2 more sources

Optical generation of focus wave modes

Journal of the Optical Society of America A, 2000
Localized wave solutions of free-space wave equation can be used in numerous applications where the localized transmission of electromagnetic energy is of major importance. However, an optical implementation of localized wave fields has not been accomplished yet, except for an ultrashort version of the Bessel beams or the so called Bessel-X pulses.
Kaido Reivelt, Peeter Saari
openaire   +3 more sources

Focus on photonics and biomedical optics

Physics Today, 2010
The descriptions of the new products listed in this section are based on information supplied to us by the manufacturers. PHYSICS TODAY can assume no responsibility for their accuracy. For more information about a particular product, visit the website at the end of the product description.
openaire   +2 more sources

Optical diagnostics of a plasma-focus device [PDF]

Optical Engineering, 1992
Systems for optical diagnostics of plasma created in a plasma-focus device are described, showing progress in the development and application of different optical methods used in plasma-focus research. In the experiments carried out on the plasma-focus device at the Institute of Plasma Physics and Laser Microfusion, multiframe Iser interferometry and ...
Krzysztof A. Tomaszewski, Zygmunt Wereszczynski, Marian Paduch, Ryszard Socha   +3 more
openaire   +1 more source

Liquid‐Crystal‐Mediated Geometric Phase: From Transmissive to Broadband Reflective Planar Optics

Advances in Materials, 2019
Planar optical elements that can manipulate the multidimensional physical parameters of light efficiently and compactly are highly sought after in modern optics and nanophotonics.
Peng Chen, Bingyan Wei, Wei Hu, Yan-qing Lu   +3 more
semanticscholar   +1 more source