Results 91 to 100 of about 3,906 (246)
Real-Time Wavefront Sensing at High Resolution with an Electrically Tunable Lens. [PDF]
Sensors (Basel), 2023 Oliva-García R +4 more
europepmc +1 more source
, 2015 The concepts and considerations that could leads to the development of a novel kind of classes of wavefront sensors inwhich the information is retrieved by the absence of photons rather than from their presence are shown. In quantumoptics the concept of ”sensing” an object without actually having photons interacting with it is already known ...
openaire +3 more sources
InfoScience, EarlyView.With the advancement of 6G communications, high‐precision radar, and advanced imaging technologies, there is a growing demand for compact, high‐performance light sources capable of generating high‐frequency radio waves (millimeter‐wave and terahertz waves). This article systematically introduces how to efficiently generate these high‐frequency waves on
Jianfeng Xiong +8 more
wiley +1 more source
PhotonicsA cross-correlation algorithm to obtain the sub-aperture shifts that occur is a crucial aspect of scene-based SHWS (Shack–Hartmann wavefront sensing).
Linxiong Wen +7 more
doaj +1 more source
Optimized Coherence Masking Improves Ultrasound Imaging of Kidney Cysts
Journal of Ultrasound in Medicine, EarlyView.Objectives Renal cystic lesions are exceedingly common and typically benign, though accurate diagnostic techniques are required to recognize the subset of malignant lesions that require timely intervention. Ultrasound (US) is the preferred first line test for renal cyst evaluation because it is safe, widely accessible, and low cost. US imaging, however,
Scott Schoen Jr +12 more
wiley +1 more source
Near‐Infrared Polarimetric Imaging With Nonlinear Flat‐Optics
Laser &Photonics Reviews, EarlyView.ABSTRACT A compact and broadband polarimetric imaging platform is presented, based on second‐harmonic generation (SHG) in nonlinear flat‐optics. The system employs periodic all‐dielectric AlGaAs gratings to induce polarization‐dependent SH emission, enabling pixel by pixel direct retrieval of the full Stokes vector from an input intensity distribution ...
Evgenii Menshikov +6 more
wiley +1 more source
Special Issue "EUV and X-ray Wavefront Sensing". [PDF]
Sensors (Basel), 2022 Idir M, Cocco D, Huang L.
europepmc +1 more source
Wavelength and Full‐Polarization Encrypted Orbital Angular Momentum Meta‐Holography
Laser &Photonics Reviews, EarlyView.By multiplexing three independent degrees of freedom of light, a single‐layer geometric‐phase metasurface encrypts 24 distinct holographic images across 3 wavelengths, 12 pairs of orthogonal polarizations, and 4 OAM channels, taking advantage of axial chromatic dispersion to reconstruct the color images at the same plane. ABSTRACT Multiplexing multiple
Yue Han +5 more
wiley +1 more source
Metasurface‐Based Polarization‐Controlled Generation of 128‐Dimensional Vector Vortex Combs
Laser &Photonics Reviews, EarlyView.The generation and continuous control of 128‐dimensional vector vortex combs using a single metasurface is reported. This work creates a class of structured light that uniquely integrates ultrahigh dimensionality with vector properties, and represents a crucial step toward on‐chip, reconfigurable generators for ultrahigh‐dimensional vector structured ...
Jiaqi Wang, Wenxi Wang, Wen Chen
wiley +1 more source
Wavefront Reconstruction for a Holographic Modal Wavefront Sensor Based on Extreme Learning Machine
IEEE Photonics JournalThe intermodal crosstalk effect as well as the limited dynamic range of holographic modal wavefront sensors (HMWFSs) significantly affect their wavefront-sensing accuracy.
Han Cao +5 more
doaj +1 more source