Results 21 to 30 of about 5,580 (232)
Frontiers in Neuroscience, 2021 ObjectiveMagnetic resonance-guided focused ultrasound surgery (MRgFUS) lesioning is a new treatment for brain disorders. However, the skull is a major barrier of ultrasound sonication in MRgFUS because it has an irregular surface and varies its size and ...
Kyung Won Chang +6 more
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Generation of Complex Transverse Energy Flow Distributions with Autofocusing Optical Vortex Beams
Micromachines, 2021 Optical vortex (OV) beams are widely used for the generation of light fields with transverse energy flow inducing orbital motion of the nano- and microparticles in the transverse plane.
Svetlana N. Khonina +3 more
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Nonparaxial abruptly autofocusing beams [PDF]
Optics Letters, 2016 5 pages, 8 figures.
Raluca-Sorina Penciu +2 more
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Autofocusing in optical scanning holography [PDF]
Applied Optics, 2009 We present autofocusing in optical scanning holography (OSH) with experimental results. We first record the complex hologram of an object using OSH and then create the Fresnel zone plate (FZP) that codes the object constant within the depth range of the object using Gaussian low-pass filtering.
Kim, Taegeun, Poon, Ting-Chung
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Autofocusing and Self-Healing Optical Vortices Realized via Circular Cubic Phase Modulation
Crystals, 2022 Optical vortices have drawn extensive research interests due to their widespread applications in various fields. Therefore, it is of great significance to modulate optical vortices to endow them with more properties.
Haozhe Xiong +6 more
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Pre-engineered abruptly autofocusing beams [PDF]
Optics Letters, 2011 We introduce a new family of (2+1)D light beams with pre-engineered abruptly autofocusing properties. These beams have a circularly symmetric input profile that develops outward of a dark disk and oscillates radially as a sublinear-chirp signal, creating a series of concentric intensity rings with gradually decreasing width.
Chremmos, Ioannis +2 more
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Autofocusing Algorithm for Pixel-Super-Resolved Lensfree On-Chip Microscopy
Frontiers in Physics, 2021 In recent years, lensfree on-chip microscopy has developed into a promising and powerful computational optical microscopy technique that allows for wide-field, high-throughput microscopic imaging without using any lenses.
Yumin Wu +19 more
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Caustic design in periodic lattices [PDF]
, 2012 We study curved trajectory dynamics and design in discrete array settings. We find that beams with power law phases produce curved caustics associated with the fold and cusp type catastrophes.
Chremmos, Ioannis +1 more
core +2 more sources
Polarimetric ISAR autofocusing
IET Signal Processing, 2008 Interest in polarimetric inverse synthetic aperture radar (ISAR) systems has been growing because of their capability to provide extra information about the imaged target compared with single polarisation ISAR systems. Target classification and recognition can be improved by exploiting full polarisation ISAR images.
MARTORELLA, MARCO +4 more
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Laguerre-Gaussian Beams with an Increased Dark Area and Autofocusing
Photonics, 2022 We introduce and investigate a novel Laguerre-Gaussian (LG) beam, different from the conventional modal LG beams, which conserve the transverse intensity structure (up to scale) on propagation.
Victor V. Kotlyar +3 more
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