Results 11 to 20 of about 2,006,423 (241)

Computer-synthesized hologram-based rainbow optical vortices

New Journal of Physics, 2004
An on-axis computer-synthesized hologram-based technique is introduced to create long-distance stable white-light 'rainbow' optical vortices. Regularities governing the radial alternation of colours at highly directed rainbow vortices are established. The original diffraction technique for detecting phase singularities is applied to reveal and diagnose
M S Soskin, P V Polyanskii, O O Arkhelyuk   +2 more
openaire   +2 more sources

Fast Diffraction Calculation for Spherical Computer-Generated Hologram Using Phase Compensation Method in Visible Range

Applied Sciences, 2020
The synthesis of the spherical hologram has been widely investigated in recent years as it enables a large field of view both horizontally and vertically.
Ruoxue Yang, Jun Wang, Chun Chen, Yang Wu, Bingyi Li, Yuejia Li, Ni Chen, Boaz Jessie Jackin   +7 more
doaj   +2 more sources

Reduction of speckle noise in laser energy distribution on the target by means of modified Fourier hologram and incoherent averaging technique

Semiconductor Physics, Quantum Electronics & Optoelectronics, 2018
Presented in this paper is the technique of formation of required laser intensity distribution on the target with a reduced speckle noise. The method is based on the use of modified Fourier hologram adapted to controlled phase modulators.
A.G. Derzhypolskyi, O.V. Gnatovskyi, L.A. Derzhypolska   +2 more
doaj   +2 more sources

Anti-Mycobacterial Evaluation of 7-Chloro-4-Aminoquinolines and Hologram Quantitative Structure–Activity Relationship (HQSAR) Modeling of Amino–Imino Tautomers

Pharmaceuticals, 2017
In an ongoing research program for the development of new anti-tuberculosis drugs, we synthesized three series (A, B, and C) of 7-chloro-4-aminoquinolines, which were evaluated in vitro against Mycobacterium tuberculosis (MTB).
Marcelle L. F. Bispo, Camilo H. S. Lima, Laura N. F. Cardoso, André L. P. Candéa, Flávio A. F. M. Bezerra, Maria C. S. Lourenço, Maria G. M. O. Henriques, Ricardo B. Alencastro, Carlos R. Kaiser, Marcus V. N. Souza, Magaly G. Albuquerque   +10 more
doaj   +2 more sources

Axial resolution post-processing engineering in Fresnel incoherent correlation holography

JPhys Photonics
Fresnel incoherent correlation holography (FINCH) is a self-interference-based incoherent digital holography method. In FINCH, light from an object point is split into two beams, modulated differently using two lenses with different focal distances, and ...
Shivasubramanian Gopinath, Joseph Rosen, Vijayakumar Anand   +2 more
doaj   +2 more sources

Synthesized acoustic holography: A method to evaluate steering and focusing performance of ultrasound arrays. [PDF]

J Acoust Soc Am
Acoustic holography is a commonly used tool to characterize the three-dimensional acoustic fields and the vibration patterns of ultrasound (US) transducers and arrays.
Williams RP, Kreider W, Nartov FA, Karzova MM, Khokhlova VA, Sapozhnikov OA, Khokhlova TD.   +6 more
europepmc   +2 more sources

Reference Waves in Synthesized Acoustical Holograms [PDF]

The Journal of the Acoustical Society of America, 1967
The reference wave necessary for recording a hologram of an object irradiated with acoustical waves A. Metherell and H. El-Sum, Appl. Phys. Letters (July 1967)] can be provided externally by appropriately controlling the phase between two coherent signals, the one that derives the sound source, and the other which is used as a reference by summing it ...
A. F. Metherell, H. M. A. El-Sum
openaire   +1 more source

Experimental Synthesis and Demonstration of the Twisted Laguerre–Gaussian Schell-Mode Beam

Photonics, 2023
The twisted Laguerre–Gaussian Schell-model (TLGSM) beam is a novel type of partially coherent beam embedded with both the second-order twist phase and the classical vortex phase.
Yuning Xia, Haiyun Wang, Lin Liu, Yahong Chen, Fei Wang, Yangjian Cai   +5 more
doaj   +1 more source

Holography with high-power CW coherent terahertz source: optical components, imaging, and applications

Light: Advanced Manufacturing, 2022
This paper presents the results of 15 years of studies in the field of terahertz holography at the Novosibirsk free electron laser. They cover two areas: research on obtaining holographic images in the terahertz range and the use of diffractive optical ...
Yulia Choporova, Boris Knyazev, Vladimir Pavelyev   +2 more
doaj   +1 more source

Spatio‐Spectral‐Temporal Imaging of Fast Transient Phenomena Using a Random Array of Pinholes

Advanced Photonics Research, 2021
Fast transient phenomena such as light–matter interactions, rapid electrical discharge, light scattering in tissues, and biochemical reactions that generate light signatures can be studied using high‐speed cameras. Herein, a lensless, single camera shot,
Vijayakumar Anand, Soon Hock Ng, Tomas Katkus, Saulius Juodkazis   +3 more
doaj   +1 more source