Results 21 to 30 of about 159,755 (262)
Three-grating monolithic phase-mask for the single-order writing of large-period gratings [PDF]
Journal 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
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Iterative phase retrieval with a sensor mask
Optics Express, 2022 As an important inverse imaging problem in diffraction optics, Fourier phase retrieval aims at estimating the latent image of the target object only from the magnitude of its Fourier measurement. Although in real applications alternating methods are widely-used for Fourier phase retrieval considering the constraints in the object and Fourier domains ...
Li Song, Edmund Y. Lam
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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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Phase measurements of EUV mask defects [PDF]
SPIE Proceedings, 2015 Extreme Ultraviolet (EUV) Lithography mask defects were examined on the actinic mask imaging system, SHARP, at Lawrence Berkeley National Laboratory. A quantitative phase retrieval algorithm based on the Weak Object Transfer Function was applied to the measured through-focus aerial images to examine the amplitude and phase of the defects.
Claus, Rene A. +7 more
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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
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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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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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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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