Results 41 to 50 of about 1,379 (173)
Three Dimensional Auto-Alignment of the ICSI Pipette
IEEE Access, 2019 Intracytoplasmic sperm injection (ICSI) is an assisted reproductive technology used in infertility treatment, where a single sperm is selected and immobilized using a glass injection pipette and is inserted directly into the cytoplasm of an oocyte under ...
Ferhat Sadak +2 more
doaj +1 more source
Abruptly autofocusing vortex beams
Optics Express, 2012 We generate abruptly autofocusing beams that produce vortices at the focus. We give explicit equations for the phase-only Fourier masks that generate these beams including explanations for controlling the focal distance and numerical aperture. We show experimental results for the focal distance, the vortex pattern and show that the diameter of the ...
Jeffrey A, Davis +2 more
openaire +2 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
Sparse Regularization with a Non-Convex Penalty for SAR Imaging and Autofocusing
Remote Sensing, 2022 In this paper, SAR image reconstruction with joint phase error estimation (autofocusing) is formulated as an inverse problem. An optimization model utilising a sparsity-enforcing Cauchy regularizer is proposed, and an alternating minimization framework ...
Zi-Yao Zhang +3 more
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HoloSpec: Dispersion‐Based 4D Computational Holographic Hyperspectral Imaging
Laser &Photonics Reviews, EarlyView.HoloSpec, a compact dispersion‐based computational holographic system, achieves four‐dimensional imaging by retrieving 3D spatial structure and high‐resolution spectra from only two monochromatic snapshots. Using a single prism and a monochrome sensor, it resolves 430 spectral channels with 3 nm experimental resolution and 30 μm$\mathrm{\mu}\mathrm{m}$
Jingyan Chen +3 more
wiley +1 more source
Results in Physics, 2023 This paper presents an innovative form of the symmetric and autofocusing beam in theory and experiment. These symmetric Olver beams (SOBs) originate from the spectral symmetry phase of the Olver beams.
Yidan Sun +7 more
doaj +1 more source
Small, EarlyView.Machine learning‐guided near‐infrared laser processing enables predictive fabrication of microneedles with application‐specific geometries. The optimized metal templates are translated into polymeric microneedles and integrated with a flexible microLED platform.
Ismail Eş +4 more
wiley +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
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
doaj +1 more source
Flexible Image Reconstruction in the Orbital Angular Momentum Holography with Binarized Airy Lens
Photonics, 2022 The orbital angular momentum (OAM) holography has been marked a path to achieving ultrahigh capacity holographic information systems. However, the practical applicability of the OAM holography is limited by the complicated optical setup and unadjustable ...
Feili Wang +6 more
doaj +1 more source