Results 21 to 30 of about 165,978 (305)
St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2020 In the paper, the influence of phase distribution over the objects’ space on resolution and depth of field of computer-generated holograms has been investigated.
Koreshev Sergey +3 more
doaj +1 more source
A simple and wavelength-flexible procedure for fabricating phase-shifted fibre Bragg gratings [PDF]
, 2010 A simple procedure for fabricating phase-shifted fibre Bragg gratings (PSFBGs) that does not require the use of a phase-shifted phase mask is presented.
Tatam, Ralph P. +5 more
core +1 more source
IET Image Processing, 2021 A novel asymmetric double image encryption technique is introduced to protect the algorithm from the interlopers by using hybrid chaotic structured phase masks in Arnold and Fresnel transforms.
Shivani Yadav, Hukum Singh
doaj +1 more source
Scientific Reports, 2023 Beam tracking X-ray Phase Contrast Imaging is a “Shack-Hartmann” type approach which uses a pre-sample mask to split the x-rays into “beamlets” which are interrogated by a detector with sufficient resolution. The ultimate spatial resolution is determined
G. Lioliou +7 more
doaj +1 more source
Multiplexed holographic aperture masking with liquid-crystal geometric phase masks [PDF]
Optical and Infrared Interferometry and Imaging VI, 2018 Presented at the 2018 SPIE Astronomical Telescopes + Instrumentation, Austin, Texas ...
Tuthill, Peter +7 more
openaire +2 more sources
STUDY OF SIGNIFICANCE OF PHASE MASK IMAGE IN ACUTE STROKE PATIENTS
Malang Neurology Journal, 2021 Background: Phase images contains information regarding local susceptibility changes between the tissues, which can help measure the iron and other content which changes the local field.
Krishna Teja Nerella +2 more
doaj +1 more source
Phase-induced amplitude apodization complex-mask coronagraph tolerancing and analysis [PDF]
, 2018 Phase-Induced Amplitude Apodization Complex Mask Coronagraphs (PIAACMC) offer high-contrast performance at a small inner-working angle ( 70%). The complex mask is a multi-zone, phase-shifting mask comprised of tiled hexagons which vary in depth.
Knight, Justin M. +11 more
core +1 more source
Inverse design for phase mask lithography
Optics Express, 2008 We have developed a method for designing the diffractive optics used in phase mask lithography. Genetic algorithms were used to inverse-design a grating's relief profile and associated exposure conditions so that desired periodic structures are formed. An experimentally promising grating designed to produce helices is demonstrated.
James W, Rinne +2 more
openaire +2 more sources
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
doaj +1 more source
, 2022 Art. 011005, 14 S.The understanding, characterization, and mitigation of three-dimensional (3-D) mask effects including telecentricity errors, contrast fading, and best focus shifts become increasingly important for the performance optimization of future
Evanschitzky, P. +5 more
core +1 more source