Results 11 to 20 of about 560,854 (291)
PhlatCam: Designed Phase-Mask Based Thin Lensless Camera. [PDF]
IEEE Trans Pattern Anal Mach Intell, 2020 Boominathan V +3 more
europepmc +2 more sources
In vivo lensless microscopy via a phase mask generating diffraction patterns with high-contrast contours. [PDF]
Nat Biomed Eng, 2022 Adams JK +11 more
europepmc +2 more sources
Trade-Off Asymmetric Profile for Extended-Depth-of-Focus Ocular Lens
Photonics, 2022 We explore the possibility of extending the depth of focus of an imaging lens with an asymmetric quartic phase-mask, while keeping the aberration within a relatively low level.
Lenny A. Romero +2 more
doaj +1 more source
Fourier phasing with phase-uncertain mask [PDF]
Inverse Problems, 2013 Fourier phasing is the problem of retrieving Fourier phase information from Fourier intensity data. The standard Fourier phase retrieval (without a mask) is known to have many solutions which cause the standard phasing algorithms to stagnate and produce wrong or inaccurate solutions.
Fannjiang, Albert, Liao, Wenjing
openaire +2 more sources
Recording of the Multiplexed Bragg Diffraction Gratings for Waveguides Using Phase Mask
Photonics, 2020 The paper describes a stable method for multiplexed recording of the Bragg diffraction gratings for waveguides using a phase mask. Diffraction waveguides in this experiment were made of photo-thermo-refractive glass.
Maria Shishova +3 more
doaj +1 more source
Extended Depth-of-Field of a Miniature Optical Endoscope Using Wavefront Coding
Applied Sciences, 2020 Endoscopic imaging is an indispensable tool for visual inspection of surfaces in hard-to-access places. The conventional optical endoscope only enables imaging the regions that lie close to the focal plane, and therefore improving the depth of field (DOF)
Lei Yang +6 more
doaj +1 more source
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
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
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