Results 111 to 120 of about 7,136,044 (235)

Cost-Effective Optical Wireless Sensor Networks: Enhancing Detection of Sub-Pixel Transmitters in Camera-Based Communications

Sensors
In the domain of the Internet of Things (IoT), Optical Camera Communication (OCC) has garnered significant attention. This wireless technology employs solid-state lamps as transmitters and image sensors as receivers, offering a promising avenue for ...
Idaira Rodríguez-Yánez, Víctor Guerra, José Rabadán, Rafael Pérez-Jiménez   +3 more
doaj   +1 more source

Helicity‐Dependent All‐Optical Switching in Bi,Ga‐Substituted Rare‐Earth Iron Garnet Films Driven by Orbital Magnetic Moment

Advanced Optical Materials, EarlyView.
Helicity‐dependent all‐optical magnetization switching was demonstrated for the Bi‐ and Ga‐substituted rare‐earth (R) iron garnet crystal thin films (Bi,Ga:RIG; R = Eu3+, Nd3+, and Y3+). The efficiency followed the order EIG > NIG > YIG. These results show the correlation between 4f orbital moment (4f〈L〉) of R3+ and helicity‐dependent optical ...
Ayumu Hata, Ryuichiro Asatani, Saiki Suzuki, Md Abdullah Al Masud, Hotaka Sakaguchi, Jun Okabayashi, Shinji Isogami, Takayuki Ishibashi   +7 more
wiley   +1 more source

Bit error rate measurement of free space optical communication links under laboratory controlled conditions [PDF]

, 2011
This paper outlines the experimental investigation of the fog effect on the bit error rate (BER) performance of the free space optical (FSO) communication link under a controlled laboratory environment.
Ghassemlooy, Zabih, Gholami, Asghar, Rajbhandari, Sujan, Ijaz, Muhammad, Le Minh, Hoa, Perez Soler, Joaquin   +5 more
core  

Extrinsic Limitations of Stealthy Hyperuniform Devices

Advanced Optical Materials, EarlyView.
Stealthy hyperuniform devices exhibit a scattering‐free angular region whose extent follows a simple quenching equation. Experimental measurements confirm this prediction but reveal quenching efficiencies far below theoretical expectations. Multiple scattering and finite‐size effects are quantified, establishing realistic performance limits for ...
Yuhao Xu, Miao Chen, Louis Forestier, Franck Carcenac, Laurent Mazenq, Philippe Lalanne   +5 more
wiley   +1 more source

Pointlike Material Accumulation and Displacement in Azopolymer Thin Films Driven by Spatial Light Modulation

Advanced Optical Materials, EarlyView.
A maskless, SLM‐driven approach enables the deterministic inscription of arbitrary topographical features in azopolymer films by mapping complex vectorial light fields onto local viscoplastic stress. This platform allows for the rapid generation and dynamic erasure of high‐aspect‐ratio micro‐spikes, offering a versatile tool for reconfigurable flat ...
Jonas Strobelt, Nikolai Liubimtsev, Marina Saphianikova, Svetlana Santer   +3 more
wiley   +1 more source

SemOCC: Task-Oriented Optical Camera Communication for Robust Robotic Command Signaling

IEEE Access
Radio Frequency (RF) networks drive Industry 4.0 robotic fleets, but they suffer from electromagnetic interference and congestion. Optical Camera Communication (OCC) provides an interference-free complement. However, conventional OCC recovers bit streams
Safwan Hafeedh Younus, Abrar S. Alhazmi, Aubida A. Al-Hameed, Ahmad J. Showail, Mohamad A. Ahmed, Abdullah Baz, Othman Younus   +6 more
doaj   +1 more source

Display Field Communication: Enabling Seamless Data Exchange in Screen–Camera Environments

Display field communication (DFC) is an emerging technology that enables seamless communication between electronic displays and cameras. It utilizes the frequency-domain characteristics of image frames to embed and transmit data, which are then decoded ...
Sung-Yoon Jung, Yu-Jeong Kim, Pankaj Singh, Byung Wook Kim   +3 more
core   +1 more source

An Examination of the Cs2NaInCl6 Luminescence: Interplay of Self‐Generated In+ and Doped Sb3+, Er3+/Yb3+ Ions

Advanced Optical Materials, EarlyView.
A new luminescence mechanism in Cs2NaInCl₆ is revealed through spontaneously formed In3+→In+ centers and Er3+/Yb3+/Sb3+ doping. Tunable visible, near‐infrared, downconversion, and upconversion emissions are demonstrated, while DFT calculations explain the electronic structure.
Inna A. Ivashchenko, Alicja Szymska‐Szymanik, Lubomir D. Gulay, Alexander Eich, Galina Gurieva, Susan Schorr, Karina V. Lamonova, Marcin Nyk, Malgorzata Makowska‐Janusik, Benjamin González‐Diaze, Katarzyna Matras‐Postołek   +10 more
wiley   +1 more source

Time-Division Multiplexed Optical Covert Communication System Based on Gain-Switched Optical Pulses

In optical covert communication systems based on gain-switched distributed feedback semiconductor lasers, the trade-off between the modulation frequency and the spectral imperceptibility limits the bit rate of the secure channel.
Yongliang Yin, Huatao Zhu, Zhanqi Liu, Mingyu Cui, Dong Liu   +4 more
core   +1 more source

Unwarping of images taken by misaligned omnicameras without camera calibration by curved quadrilateral morphing using quadratic pattern classifiers [PDF]

, 2010
[[abstract]]A method for solving the problem of unwarping a distorted omni-image taken by a lateral-direction misaligned omni-camera with its optical axis incoincident with its mirror axis is proposed.
Wu, CJ (Wu, Chih-Jen); Tsai, WH (Tsai, Wen-Hsiang)
core