Results 51 to 60 of about 4,294 (185)
Logarithmic Laplacian Prior Based Bayesian Inverse Synthetic Aperture Radar Imaging
Sensors, 2016 This paper presents a novel Inverse Synthetic Aperture Radar Imaging (ISAR) algorithm based on a new sparse prior, known as the logarithmic Laplacian prior.
Shuanghui Zhang +3 more
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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
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Multi-spot live-image autofocusing for high-throughput microscopy of fluorescently stained bacteria [PDF]
, 2009 Screening by automated high-throughput microscopy has become a valuable research tool. An essential component of such systems is the autonomous acquisition of focused images.
Pernthaler, J, Zeder, M
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Lightweight smart autofocusing eyeglasses
MOEMS and Miniaturized Systems XVII, 2018 More than 100 million people in the United States of America alone suffer from age-related presbyopia caused by a loss of focal accommodation of the eye crystalline lens as the lens stiffens with age. The resulting accommodative error or lag produces blurred images of objects placed at different distances.
Chayanjit Ghosh +6 more
openaire +4 more sources
Ion microscopy with evolutionary-algorithm-based autofocusing
Engineering Research Express, 2023 Abstract Ion microscopy is an established technique for laser focus diagnostics and the accurate, intensity-resolved measurement of laser ionization processes. In the present feasibility study, we discuss a new ion microscope design, which improves its resolution across a large range of magnifications and simplifies its operation ...
Franz E Haniel +4 more
openaire +3 more sources
EXPERIMENTAL KA-BAND GROUND-BASED SAR SYSTEM
Radio Physics and Radio Astronomy, 2015 An experimental ground-based synthetic aperture radar (GB-SAR) system operating at Ka-band has been developed. The system is designed to be operated from a top a hill or from a building roof, etc. for imaging the underlying ground terrain.
O. O. Bezvesilniy +6 more
doaj +1 more source
Abnormally autofocusing vortex Swallowtail Gaussian vector beam with low spatial coherence
New Journal of Physics, 2023 The precondition for the application of light beams is the ability to devise light distribution with high precision. Controlling more dimensions for structured light fields is an effective method to improve the ability to devise light distribution.
Jingyi Shi +5 more
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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
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Implementation and Optimization of a Dual-confocal Autofocusing System
Sensors, 2020 This paper describes the implementation and optimization of a dual-confocal autofocusing system that can easily describe a real-time position by measuring the response signal (i.e., intensity) of the front and the rear focal points of the system. This is
Chia-Ming Jan +2 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