Results 151 to 160 of about 101,447 (298)

Memory‐Reduced Convolutional Neural Network for Fast Phase Hologram Generation

open access: yesAdvanced Intelligent Systems, EarlyView.
This article reports a lightweight convolutional neural network framework using INT8 quantization to efficiently generate 3D computer‐generated holograms from a single 2D image. The quantized model reduces memory usage and computational cost, accelerates inference speed, and maintains high output quality, enabling real‐time holographic display on low ...
Chenliang Chang   +6 more
wiley   +1 more source

Using Acoustic Holography for Vibration Analysis [PDF]

open access: yes, 2009
Disertační práce se zabývá bezkontaktní analýzou vibrací pomocí metod akustické holografie v blízkém poli. Akustická holografie v blízkém poli je experimentální metoda, která rekonstruuje akustické pole v těsné blízkosti povrchu vibrujícího předmětu na ...
Havránek, Zdeněk
core  

Steerable High‐Resolution Ultrasound Focusing via Phase‐Array‐Activated Acoustic Meta‐Lenses

open access: yesAdvanced Physics Research, EarlyView.
Conventional phased arrays face a trade‐off between performance and complexity. Here, a unique approach is proposed by decoupling the functions into two steps. In step 1, a sparse phased array generates a steerable plane wave with little distortion. In step 2, the steerable plane wave is reshaped into high‐resolution acoustic focusing or holographic ...
Xin‐Yu Cui   +7 more
wiley   +1 more source

Asynchronous Phase Shifts are Effective for Interferometric Single‐Molecule Localization Microscopy

open access: yesLaser &Photonics Reviews, EarlyView.
While interferometric Single‐Molecule Localization Microscopy (iSMLM) is well established to provide ultra‐high 3D precision, highly complex optical instrumentations are conventionally required for simultaneous multi‐phase interferometry. Here it is demonstrated that simultaneous multi‐phase interferometry is not essential for achieving ultra‐high ...
Zengxin Huang   +4 more
wiley   +1 more source

Recent advances in atomic resolution three-dimensional holography

open access: yesAdvances in Physics: X
Three-dimensional (3D) local atomic structure around specific functional atom plays a crucial role in functional materials, but it has not been able to be analyzed by a standard structure analysis method of x-ray diffraction (XRD) because this kind of ...
Hiroshi Daimon   +4 more
doaj   +1 more source

Decoupling Optical and Thermal Dynamics in Dielectric Metasurfaces for Self‐Encoded Photonic Control

open access: yesLaser &Photonics Reviews, EarlyView.
Schematic representation of transmission modulation via photo‐thermo‐optical non‐linearities in a dielectric metasurface. Abstract Thermo‐optical nonlinearities (TONL) in metasurfaces enable dynamic control of optical properties—such as transmitted power, phase, and polarization—through external stimuli like laser irradiation or temperature. Due to the
Omer Can Karaman   +4 more
wiley   +1 more source

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