Results 11 to 20 of about 614 (175)
Synthesis of holograms received by a communication channel [PDF]
Компьютерная оптика, 2020 A method for the synthesis of holograms that reconstruct a 3D image using two 2D images, including a topographic map of the surface of a 3D object and photographs of the texture of its surface obtained using coherent and incoherent radiation is proposed.
S.A. Shoydin
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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
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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 +5 more
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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 +2 more
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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 +3 more
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St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2020 In the paper, the influence of phase distribution over the objects’ space on resolution and depth of field of computer-generated holograms has been investigated.
Koreshev Sergey +3 more
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Copyright protection of deep image classification models
Компьютерная оптика, 2023 With the growing number of tasks solved using deep learning methods, the need for protection against unauthorized distribution of the intellectual property such as pre-trained models of deep neural networks is growing.
Y.D. Vybornova, D.I. Ulyanov
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Monochrome Image Hologram (MIH)
مجلة بغداد للعلوم, 2008 A new computer-generated optical element called a monochrome image hologram (MIH) is described. A real nonnegative function to represent the transmittance of a synthesized hologram is used.
Baghdad Science Journal
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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 +2 more
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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 +7 more
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