Results 71 to 80 of about 2,952 (284)

Computer generated hologram with characteristics of reflection: reflectance distributions and reflected images [PDF]

, 2009
This paper proposes a new computer generated hologram (CGH) method that considers the reflectance distribution on object surfaces and reflected images.
Sakamoto, Yuji, Yamaguchi, Kazuhiro
core   +1 more source

Scaling of Three-Dimensional Computer-Generated Holograms with Layer-Based Shifted Fresnel Diffraction

Applied Sciences, 2019
Holographic three-dimensional (3D) displays can reconstruct a whole wavefront of a 3D scene and provide rich depth information for the human eyes. Computer-generated holographic techniques offer an efficient way for reconstructing holograms without ...
Hao Zhang, Liangcai Cao, Guofan Jin
doaj   +1 more source

Recent Advances in Programmable Metasurfaces and Meta‐Devices

Advanced Electronic Materials, EarlyView.
Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao, Chong He, Nan Wang, Liming Si, Weiren Zhu   +4 more
wiley   +1 more source

Non-convex optimization for inverse problem solving in computer-generated holography

Light: Science & Applications
Computer-generated holography is a promising technique that modulates user-defined wavefronts with digital holograms. Computing appropriate holograms with faithful reconstructions is not only a problem closely related to the fundamental basis of ...
Xiaomeng Sui, Zehao He, Daping Chu, Liangcai Cao   +3 more
doaj   +1 more source

An Adaptive and Secure Holographic Image Watermarking Scheme

Entropy, 2019
A novel adaptive secure holographic image watermarking method in the sharp frequency localized contourlet transform (SFLCT) domain is presented. Based upon the sine logistic modulation map and the logistic map, we develop an encrypted binary computer ...
Chuying Yu, Xiaowei Li, Xinan Chen, Jianzhong Li   +3 more
doaj   +1 more source

Zero order suppression on computer generated hologram produced by different spatial light modulators

, 2013
textThe problem of zero order diffraction (ZOD) in the computer generated hologram (CGH) is a commonly reported issue in employing computer generated hologram (CGH) systems.
Wu, Sih-Ying
core  

Compact antenna test range based on a computer-generated hologram and its use at submillimeter wavelengths

, 2007
Compact antenna test range developed at TKK Helsinki University of Technology utilizes a computer-generated amplitude hologram as the collimating element.
Ala-Laurinaho, J., Tamminen, A., Lönnqvist, Anne, J. Hakli, V. Viikari, Räisänen, A.V., J. Ala-Laurinaho, A. Lonnqvist, Koskinen, T., E. Noponen, Viikari, V., A. Tamminen, Häkli, Janne, M. Vaaja, A. V. Raisanen, Noponen, E., J. Mallat, Karttunen, A., T. Koskinen, Vaaja, M., A. Karttunen, Mallat, J.   +21 more
core   +1 more source

Phase-encoded computer-generated-hologram implemented with liquid crystal television [PDF]

, 2020
The advantages of phase-encoded computer-generated-hologram (CGH) are high diffraction efficiency and the ability to reconstruct images on-axis. These advantages are very fundamental and important for many applications.
Ken Y Hsu, Ren-Chung Liu
core  

Machine Learning‐Assisted Design and Performance Prediction of a Compact Dual‐Band Polarization‐Insensitive THz Metamaterial Absorber for Skin‐Cancer‐Related Refractive‐Index Sensing

Advanced Electronic Materials, EarlyView.
A compact QASRR‐based THz metamaterial absorber enables polarization‐insensitive dual‐band absorption and skin‐cancer‐related refractive‐index sensing through measurable resonance shifts. Field, surface‐current, and circuit analyses clarify the dual‐resonance mechanism, while StackNet‐assisted prediction accurately estimates the simulated absorption ...
Md. Murad Kabir Nipun, S. M. Rifatur Rana, Md. Golam Morshed, Imrose Jahan, F. A. Sabbir Ahamed, Md. Jahedul Islam   +5 more
wiley   +1 more source

Advancing Energy Materials by In Situ Atomic Scale Methods

Advanced Energy Materials, Volume 15, Issue 11, March 18, 2025.
Progress in in situ atomic scale methods leads to an improved understanding of new and advanced energy materials, where a local understanding of complex, inhomogeneous systems or interfaces down to the atomic scale and quantum level is required. Topics from photovoltaics, dissipation losses, phase transitions, and chemical energy conversion are ...
Christian Jooss, Michael Seibt, Martin Wenderoth, Oliver Bünermann, Ole Bunjes, Till Domröse, Christian Eckel, Francesca Falorsi, Christoph Flathmann, Monica Kolek Martinez de Azagra, Matthias Krüger, Jonas Lindner, Tobias Meyer, Claus Ropers, Ulrich Ross, Kai Rossnagel, Sreeju Sreekantan Nair Lalithambika, Simone Techert, Georg A. Traeger, Cynthia Volkert, R. Thomas Weitz, Alec M. Wodtke   +21 more
wiley   +1 more source