Results 21 to 30 of about 560,798 (337)
Fresnel Lens Array-Based Phase Mask Location Method for Adjustable Multi-Pass Cavity
Photonics, 2023 The modulation accuracy of Multi-Plane Light Conversion (MPLC) mainly depends on the positioning accuracy of the phase mask on the Spatial Light Modulator (SLM).
Ximing Wang +5 more
doaj +1 more source
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
Effect of mask discretization on performance of silicon arrayed waveguide gratings [PDF]
, 2014 We studied the impact of the lithography mask discretization on silicon arrayed waveguide grating (AWG) performance. When we decreased the mask grid from 5 to 1 nm, we observed an experimental improvement in crosstalk of 2.7-6 dB and cumulative crosstalk
Absil, Philippe +7 more
core +2 more sources
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
On-sky observations with an achromatic hybrid phase knife coronagraph in the visible [PDF]
, 2006 CONTEXT: The four-quadrant phase mask stellar coronagraph, introduced by D. Rouan et al., is capable of achieving very high dynamical range imaging and was studied in the context of the direct detection of extra-solar planets.
A. Domiciano de Souza +24 more
core +5 more sources
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
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 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
openaire +2 more sources
Spectrally exclusive phase masks for wavefront coding [PDF]
Optics Letters, 2021 The use of phase masks is necessary for wavefront coding, and these are often based on optical path differences. However, the optical dispersion constrains the resulting device to operate within a restricted spectral bandwidth. Here we propose to remove this constraint due to sub-wavelength structuration of the surface.
Micke Boher +4 more
openaire +2 more sources
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 ...
Bourget, P. +5 more
core +1 more source