Results 31 to 40 of about 560,854 (291)

Three-grating monolithic phase-mask for the single-order writing of large-period gratings [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2011
An optimized achromatic high-efficiency monolithic phase mask is presented whose principle was demonstrated and described in reference [1]. The mask comprises three submicron period diffraction gratings at a single substrate side that create a purely ...
Bourgin Yannick   +7 more
doaj   +1 more source

Holographic fabrication of three-dimensional orthorhombic and tetragonal photonic crystal templates using a diffractive optical element [PDF]

open access: yes, 2007
We report the fabrication of both orthorhombic and tetragonal photonic crystal templates using a phase mask technique. Three-dimensional photonic crystal structures were formed by a double exposure of SU8 to three-beam interference patterns generated by ...
Chen, KP   +5 more
core   +1 more source

Single-Shot Compressed Imaging via Random Phase Modulation

open access: yesApplied Sciences, 2022
Compressed sensing (CS) provides an innovative framework for signal sampling, which enables accurate recovery of the sparse or compressible signal from a small set of linear measurements far fewer than the Nyquist rate in traditional signal processing ...
Cheng Zhang   +5 more
doaj   +1 more source

Exploring the prevalence and experience of mask anxiety for the person with head and neck cancer undergoing radiotherapy

open access: yesJournal of Medical Radiation Sciences, 2018
Introduction While use of a thermoplastic mask during radiotherapy (RT) treatment for head and neck cancer (HNC) is an essential component of safe patient care, there is little understanding of the extent to which this evokes anxiety (i.e. “mask anxiety”)
Jodie L. Nixon   +7 more
doaj   +1 more source

Fabrication of Polymer Optical Fibre (POF) Gratings

open access: yesSensors, 2017
Gratings inscribed in polymer optical fibre (POF) have attracted remarkable interest for many potential applications due to their distinctive properties.
Yanhua Luo   +5 more
doaj   +1 more source

PSSegNet: Segmenting the P- and S-Phases in Microseismic Signals through Deep Learning

open access: yesMathematics, 2023
Microseismic P- and S-phase segmentation is an influential step that limits the accuracy of event location, parameter inversion, and mechanism analysis.
Zhengxiang He   +5 more
doaj   +1 more source

Holographic fabrication of photonic crystals using multidimensional phase masks [PDF]

open access: yes, 2008
This paper reports the experimental approaches to the fabrication of two-layer integrated phase masks and the fabrication of photonic crystal templates using the phase mask based on holographic lithography technique.
Chen, KP   +5 more
core   +2 more sources

UV-Writing of a Superstructure Waveguide Bragg Grating in a Planar Polymer Substrate

open access: yesSensors, 2017
We report on the fabrication of a superstructure Bragg grating in a planar polymer substrate. Based on a twofold illumination process an integrated waveguide and a superstructure Bragg grating are subsequently written into bulk polymethylmethacrylate by ...
Manuel Rosenberger   +2 more
doaj   +1 more source

Lyot-based Low Order Wavefront Sensor: Implementation on the Subaru Coronagraphic Extreme Adaptive Optics System and its Laboratory Performance

open access: yes, 2014
High throughput, low inner working angle (IWA) phase masks coronagraphs are essential to directly image and characterize (via spectroscopy) earth-like planets.
Baudoz, Pierre   +7 more
core   +2 more sources

Multi-Color Luminescence Transition of Upconversion Nanocrystals via Crystal Phase Control with SiO2 for High Temperature Thermal Labels [PDF]

open access: yes, 2020
Upconversion nanocrystals (UCNs)-embedded microarchitectures with luminescence color transition capability and enhanced luminescence intensity under extreme conditions are suitable for developing a robust labeling system in a high-temperature thermal ...
Baek, Dahye   +8 more
core   +1 more source

Home - About - Disclaimer - Privacy