Results 51 to 60 of about 1,217,682 (246)

Digital Fourier Transform Holography Using a Beam Displacer

Engineering Proceedings, 2023
Fourier transform holography overcomes the phase recovery challenge through recording complex field information of the object in an interference pattern recorded at the far field, i.e., Fourier plane.
Mohit Rathor, Shivam Kumar Chaubey, Rakesh Kumar Singh   +2 more
doaj   +1 more source

Generation of Phase-Only Fourier Hologram Based on Double Phase Method and Quantization Error Analysis

IEEE Photonics Journal, 2020
The double phase method is an efficient way to generate phase-only holograms with high reconstruction quality due to no addition of a random phase. However, it cannot directly encode the Fourier spectrum because of the limited gray modulation range of ...
Yang Wu, Jun Wang, Chun Chen, Chan-Juan Liu, Feng-Ming Jin, Yu-Hen Hu   +5 more
doaj   +1 more source

Regularized reconstruction of absorbing and phase objects from a single in-line hologram, application to fluid mechanics and micro-biology.

Optics Express, 2018
Reconstruction of phase objects is a central problem in digital holography, whose various applications include microscopy, biomedical imaging, and fluid mechanics.
F. Jolivet, F. Momey, L. Denis, L. Mees, N. Faure, N. Grosjean, Frédéric Pinston, J. Marié, C. Fournier   +8 more
semanticscholar   +1 more source

Reconstruction of non-error magnetic hologram data by magnetic assist recording

Scientific Reports, 2017
Hologram memory is expected to be the next-generation of optical data storage technology. Bismuth-substituted yttrium iron garnet is typically used for rewritable magnetic hologram media.
Zen Shirakashi, T. Goto, H. Takagi, Yūichi Nakamura, P. Lim, H. Uchida, M. Inoue   +6 more
semanticscholar   +1 more source

Enhanced Ultrasound Transmission Through Aberration Layers Using Space‐Coiling Acoustic Metamaterials

Advanced Engineering Materials, EarlyView.
Enhancing ultrasound transmission through an aberration layer exhibiting mismatched impedance with the surrounding medium possesses great implications in imaging and treatment. In this study, we show that a space‐coiling acoustic metamaterial with judiciously tailored structural profile can help improve impedance matching.
Maral Ghanami, Hengzhe Ren, Erqian Dong, Ashkan Ghanbarzadeh‐Dagheyan, Chen Shen   +4 more
wiley   +1 more source

Fast Extended Depth-of-Field Reconstruction for Complex Holograms Using Block Partitioned Entropy Minimization

Applied Sciences, 2018
Optical scanning holography (OSH) is a powerful and effective method for capturing the complex hologram of a three-dimensional (3-D) scene. Such captured complex hologram is called optical scanned hologram. However, reconstructing a focused image from an
Peter Wai Ming Tsang, Ting-Chung Poon, Jung-Ping Liu   +2 more
doaj   +1 more source

Enhanced design of multiplexed coded masks for Fresnel incoherent correlation holography

Scientific Reports, 2023
Fresnel incoherent correlation holography (FINCH) is a well-established incoherent digital holography technique. In FINCH, light from an object point splits into two, differently modulated using two diffractive lenses with different focal distances and ...
Shivasubramanian Gopinath, Andrei Bleahu, Tauno Kahro, Aravind Simon John Francis Rajeswary, Ravi Kumar, Kaupo Kukli, Aile Tamm, Joseph Rosen, Vijayakumar Anand   +8 more
doaj   +1 more source

From Photoalignment to Structured Light: Liquid Crystal Platforms for Beam Shaping and Complex Wavefronts

Advanced Functional Materials, EarlyView.
Photoaligned and photopatterned liquid crystal platforms provide programmable control of optical phase, polarization, and spin‐orbit interactions, enabling compact generation of structured light and complex wavefronts. This review highlights how tailored molecular orientations transform simple beams into designed optical fields, opening versatile ...
Le Zhou, Tingjun Zhong, Sijie Liu, Pouya Nosratkhah, Ke Xu, Yuzhen Zhao, Kristiaan Neyts   +6 more
wiley   +1 more source

Application of Super-Resolution Image Reconstruction to Digital Holography

EURASIP Journal on Advances in Signal Processing, 2006
We describe a new application of super-resolution image reconstruction to digital holography which is a technique for three-dimensional information recording and reconstruction.
Zhang Shuqun
doaj   +1 more source

Application of Kinoform CGHs to an ID Tag System

IEEE Photonics Journal, 2010
In this paper, we successfully apply multilevel kinoform computer-generated hologram (CGH) patterns, which are recorded on a fine texture paper by a photo printer, into the hologram identification (ID) tag system.
Hye-Rim Kim, Ki-Mun Pak, Ki-Woo Jun, Hyun-Whan Choi, Ji-Song Lim, Yong-Hyub Won   +5 more
doaj   +1 more source