Results 121 to 130 of about 4,729 (265)

Study on Impurity Particle Detection in Transformer Oil Based on Microflow Imaging Method

High Voltage, EarlyView.
ABSTRACT The concentration of particles in transformer oil has a significant influence on its electrical performance, making oil cleanliness a critical parameter in the operation and maintenance of power transformers. However, the light obstruction (LO) method recommended by current standards has inherent limitations, including low sensitivity to ...
Chen Chen, Lijun Yang, Wu Zhao, Zhengyu Chen, Xinxi Yu, Yong Li, Ruijin Liao   +6 more
wiley   +1 more source

High numerical aperture freeform-based illumination for compact lensless holographic microscopy

JPhys Photonics
Digital lensless holographic microscopy (DLHM) is a simple and cost-effective technique for retrieving label-free microscopic information from transparent samples.
Maria J Lopera, Dries Rosseel, Yunfeng Nie, Carlos Trujillo, Hugo Thienpont, Heidi Ottevaere   +5 more
doaj   +1 more source

Conically scanned holographic lidar telescope

, 1993
An optical scanning device utilizing a source of optical energy such as laser light backscattered from the earth's atmosphere or transmitted outward as in a lidar, a rotating holographic optical element having an axis of rotation perpendicular to the ...
Schwemmer, Geary
core  

Stress analysis of weldments by holographic moire and the finite element method

, 2000
The research work presented in this paper deals with the determination of the stress concentration at the root of the fillet of a weldment on a T steel specimen. A finite element model was developed for the specimen.
Trentadue, B., Singh, B., Sciammarella, Cesar Augusto, Sciammarella, F. M.   +3 more
core   +1 more source

Full‐field X‐ray fluorescence imaging using a Fresnel zone plate as a coded aperture: optimized reconstruction algorithm and first trial of hyperspectral XANES mapping

Journal of Synchrotron Radiation, EarlyView.
The full‐field X‐ray fluorescence imaging method, where a Fresnel zone plate is employed as a coded aperture, was tested for the first time at a beamline, and its corresponding reconstruction code was optimized. It was also employed to perform, also for the first time using full‐field and fluorescence modes, hyperspectral XANES mapping.This study ...
Gautier Landrot, Arkadiusz Dawiec, Björn Eckert, Petra Majewski, Michael Brunner, Andrew Fram, Martin Huth, Guillaume Alizon, Claude Menneglier, Enrico Piasentier, Karine Chaouchi, Stéphanie Blanchandin, Pascal Mercere, Martin Chauvin, Emiliano Fonda   +14 more
wiley   +1 more source

Diffractive wavefront correction for Fe L‐edge spectroscopy on the meV scale

Journal of Synchrotron Radiation, EarlyView.
We propose an aberration‐corrected, wavelength‐dispersive instrument for soft X‐ray spectroscopy at an energy‐resolving power of (5–6) × 104, designed for, for example, resonant inelastic X‐ray scattering at synchrotron beamlines or X‐ray free‐electron lasers.We propose a wavelength‐dispersive instrument for high‐resolution soft X‐ray spectroscopy at ...
Christoph Braig, Andrey Sokolov, Frank Siewert, Christian Seifert   +3 more
wiley   +1 more source

Holographic diffractive structures.

, 2003
In the thesis, applications of single- or double-element holographic diffractive structures are used as collimators for divergent elliptical beam edge emitted from diode lasers are reported. The thesis focuses on basic principles of diffractive gratings.
Pala, Jan
core  

Holographic Optical Element Fiber Coupler For The Near Infrared

, 1987
We describe the possibility to use a single holographic optical element (HOE) for coupling between multimode optical fibers at a wavelength close to 1.3 μm. Dichromated gelatin is used as photosensitive medium for recording at 514 nm.
F. M. De Schryver, De Schryver, Fabien
core   +1 more source

Measuring Lead Userness: Development and Validation of a Hierarchical Scale

Creativity and Innovation Management, Volume 34, Issue 4, Page 944-962, December 2025.
ABSTRACT Lead user theory has gained traction in both academia and practice, given that involving lead users (LUs) can yield more innovative and commercially successful products. Yet, measurement inconsistencies have hindered consensus on how to reliably assess lead userness.
Moritz Paulus, Slawka Jordanow, Sven Heidenreich, Franziska Janz   +3 more
wiley   +1 more source

Implementation of a Spatially Multiplexed Pixelated Three-dimensional Display by Use of a Holographic Optical Element Array

, 1998
A pixelated holographic stereogram is proposed and experimentally studied for the emulation of a spatially multiplexed composite three-dimensional (3-D) pixel display.
Chen, Shih-Tun, Chatterjee, Monish Ranjan   +1 more
core   +1 more source