Results 51 to 60 of about 5,613 (231)
An optimum design of a ring Airyprime beam array based on dimensionless eccentric position
Results in PhysicsThe beam array with abruptly autofocusing capability weakens the turbulence effect in free space optical (FSO) communication systems with relatively low complexity, thereby improving the communication quality of FSO communication systems.
Yi-Min Zhou +4 more
doaj +1 more source
Sensors, 2021 Surface reconstruction for micro-samples with large discontinuities using digital holography is a challenge. To overcome this problem, multi-incidence digital holographic profilometry (MIDHP) has been proposed. MIDHP relies on the numerical generation of
Moncy Sajeev Idicula +5 more
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Mathieu and Weber tightly autofocusing beams
Optics Express, 2023 We theoretically investigate the propagation dynamics of vectorial Mathieu and Weber tightly autofocusing beams, which are constructed based on nonparaxial Weber and Mathieu accelerating beams, respectively. They can automatically focus along the paraboloid and ellipsoid, and the focal fields represent the tightly focusing properties resembling that ...
Zhaojin Guo +4 more
openaire +2 more sources
Closed-form expressions for nonparaxial accelerating beams with pre-engineered trajectories
, 2015 In this letter, we propose a general real-space method for the generation of nonparaxial accelerating beams with arbitrary predefined convex trajectories. Our results lead to closed-form expressions for the required phase at the input plane.
Efremidis, Nikolaos K. +2 more
core +1 more source
Temporal cloaking with accelerating wave packets
, 2014 We theoretically propose a temporal cloaking scheme based on accelerating wave packets. A part of a monochromatic lightwave is endowed with a discontinuous nonlinear frequency chirp, so that two opposite accelerating caustics are created in space-time as
Chremmos, Ioannis
core +1 more source
A nonquadratic regularization-based technique for joint SAR imaging and model error correction [PDF]
, 2008 Regularization based image reconstruction algorithms have successfully been applied to the synthetic aperture radar (SAR) imaging problem. Such algorithms assume that the mathematical model of the imaging system is perfectly known.
Cetin, Mujdat +3 more
core +1 more source
Enhanced Rapid Autofocus Back-Projection for PBSAR Based on the GEO Satellite
Remote SensingThe passive bistatic synthetic aperture radar (PBSAR) is recognized as a critical developmental direction for future radar systems. To validate its operational feasibility, we designed a PBSAR system. However, significant measurement errors were observed
Te Zhao +4 more
doaj +1 more source
Sensors, 2017 A high resolution inverse synthetic aperture radar (ISAR) technique is presented using modified Doppler history based motion compensation. To this purpose, a novel wideband ISAR system is developed that accommodates parametric processing over extended ...
Jung-Hwan Song +3 more
doaj +1 more source
Airy beam induced optical routing
, 2013 We present an all-optical routing scheme based simultaneously on optically induced photonic structures and the Airy beam family. The presented work utilizes these accelerating beams for the demonstration of an all-optical router with individually ...
Agrawal G. P. +4 more
core +1 more source
Utilizing sensor fusion in markerless mobile augmented reality [PDF]
, 2011 One of the key challenges of markerless Augmented Reality (AR) systems, where no a priori information of the environment is available, is map and scale initialization.
Coulton, Paul +2 more
core +1 more source