Results 11 to 20 of about 9,261 (301)

Residual stress measurement for injection molded components

open access: yesTheoretical and Applied Mechanics Letters, 2016
Residual stress induced during manufacturing of injection molded components such as polymethyl methacrylate (PMMA) affects the mechanical and optical properties of these components.
Achyut Adhikari   +2 more
doaj   +1 more source

High Frequency Modulation Method for Measuring of Birefringence

open access: yesEPJ Web of Conferences, 2013
A method of optical birefringence measurement is presented. It uses an el ectro-optic modulator for the high frequency modulation of polarization of the laser beam. The developed optical apparatus exhibits high sensitivity.
Šulc M., Kunc Š.
doaj   +1 more source

Optical rheology of porcine sclera by birefringence imaging. [PDF]

open access: yesPLoS ONE, 2012
To investigate a relationship between birefringence and elasticity of porcine sclera ex vivo using polarization-sensitive optical coherence tomography (PS-OCT).Elastic parameters and birefringence of 19 porcine eyes were measured.
Masahiro Yamanari   +8 more
doaj   +1 more source

Zero-birefringence pressure-sensitive adhesives

open access: yesAIP Advances, 2012
We have developed zero-birefringence pressure-sensitive adhesives (PSAs) that exhibit almost no birefringence at any orientation of polymer chains. To evaluate the birefringence of PSAs quantitatively, we report a novel birefringence-measurement method ...
Hiroto Ito   +4 more
doaj   +1 more source

Recent Advances in High-Birefringence Fiber Loop Mirror Sensors

open access: yesSensors, 2007
Recent advances in devices and applications of high-birefringence fiber loopmirror sensors are addressed. In optical sensing, these devices may be used as strain andtemperature sensors, in a separate or in a simultaneous measurement.
José L. Santos   +2 more
doaj   +1 more source

Highly Precise Birefringence Demodulation to Overcome the Sensing Limitation From the Free Spectral Range on the Fiber Lyot Filter

open access: yesIEEE Access, 2020
A high precision demodulation method based on least squares fitting for expanding the temperature measurement range of the fiber Lyot filter has been proposed and experimentally demonstrated. And a compact reflective Lyot filter has also been proposed to
Wei Li, Tiantian Ruan, Min Xia, Li Xia
doaj   +1 more source

Discriminative Monitoring of Seamless Rail Force by a High-Birefringence Effect-Based Fiber Optic Sensing Method

open access: yesFrontiers in Physics, 2022
Nowadays, China has developed over 38,000-km high-speed railways (HSR). As one of the key elements in the HSR system, continuous welded rail (CWR) enables higher transportation efficiency, while demands for more robust inspection and maintenance ...
Yin Zhou   +7 more
doaj   +1 more source

Optical Polarization-Based Measurement Methods for Characterization of Self-Assembled Peptides’ and Amino Acids’ Micro- and Nanostructures

open access: yesMolecules, 2022
In recent years, self-assembled peptides’ and amino acids’ (SAPA) micro- and nanostructures have gained much research interest. Here, description of how SAPA architectures can be characterized using polarization-based optical measurement methods is ...
Amir Handelman
doaj   +1 more source

Recent Progress in Distributed Fiber Optic Sensors

open access: yesSensors, 2012
Rayleigh, Brillouin and Raman scatterings in fibers result from the interaction of photons with local material characteristic features like density, temperature and strain.
Xiaoyi Bao, Liang Chen
doaj   +1 more source

Birefringent Glass‐Engraved Tilted Pillar Metasurfaces for High Power Laser Applications

open access: yesAdvanced Science, 2023
Birefringent materials—which are highly needed in high power laser systems—may be limited in usage due to the laser‐induced damage threshold of traditional birefringent materials.
Nathan J. Ray   +4 more
doaj   +1 more source

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