Results 31 to 40 of about 165,978 (305)
Single-Shot Compressed Imaging via Random Phase Modulation
Applied 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
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A family of phase masks for broadband coronagraphy example of the wrapped vortex phase mask theory and laboratory demonstration [PDF]
Astronomy & Astrophysics, 2020 Context. Future instruments need efficient coronagraphs over large spectral ranges to enable broadband imaging or spectral characterization of exoplanets that are 108 times fainter than their star. Several solutions have been proposed. Pupil apodizers can attenuate the star intensity by a factor of 1010 but they only transmit a few percent of the light
Galicher, R. +3 more
openaire +4 more sources
Journal 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
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Fabrication of Polymer Optical Fibre (POF) Gratings
Sensors, 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
Mathematics, 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
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UV-Writing of a Superstructure Waveguide Bragg Grating in a Planar Polymer Substrate
Sensors, 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
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Extinction controlled adaptive mask coronagraph Lyot and phase mask dual concept for wide extinction area [PDF]
, 2012 A dual coronagraph based on the Adaptive Mask concept is presented in this paper. A Lyot coronagraph with a variable diameter occulting disk and a nulling stellar coronagraph based on the Adaptive Phase Mask concept using polarization interferometry are ...
Frederic Gonte +11 more
core +1 more source
New Journal of Physics, 2019 Electron-beam shaping opens up novel imaging possibilities in electron microscopy (EM). The implementation of a phase or amplitude mask in the condenser lens system allows the generation of electron beams with various shapes. Non-diffractive Bessel beams
Simon Hettler +2 more
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Inverse sinusoidal phase mask to extend the depth of field of incoherent imaging systems
, 2016 Wavefront coding is an effective way to extend the depth of field of an incoherent imaging system. With a suitable phase mask, the defocus invariant imaging characteristic of an incoherent imaging system can be achieved. In this paper, an effective way
Wenji She +8 more
core +1 more source
Design and Application of Phase-Only Diffractive Optical Element Based on Non-Iterative Method
Photonics, 2022 In this study, we devised a method for the design of continuous phase-only holographic masks that map laser light to arbitrary target illumination patterns, which have a wide range of applications.
Kuo Shi, Gongjian Zhang
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