Results 71 to 80 of about 919,980 (236)

Study of Point Scanning Detection Mechanisms for Vibration Signals with Wavefront Sensors

Photonics
Seismic wave laser remote sensing is extensively employed in seismic monitoring and resource exploitation. This work establishes a vibration signal point scanning detection system utilizing wavefront sensors, leveraging their high resolution, array ...
Quan Luo, Hongsheng Luo, Yiyou Fan, Guihan Wu, Haoming Chen, Yun Pan, Wei Jiang, Jinshan Su   +7 more
doaj   +1 more source

Computational Wavefront Sensing: Theory, Practice, and Applications

, 2021
Wavefront sensing is a fundamental problem in applied optics. Wavefront sensors that work in a deterministic manner are of particular interest. Initialized with a unified theory for classical wavefront sensors, this dissertation discusses relevant ...
Wang, Congli
core   +1 more source

Metasurface‐Based Multidimensional Light‐Field Manipulation: From Technologies to Applications

Advanced Science, EarlyView.
Multidimensional metasurfaces enable versatile manipulation of multiple optical degrees of freedom, including phase, amplitude, polarization, wavelength, and orbital angular momentum. This review summarizes their fundamental mechanisms, emerging strategies for multidimensional light‐field control, and key applications in optical computing, imaging ...
Heliang Yin, Shuo Sun, Jiahao Zhang, Jianuo Hu, Yubin Qiao, Liang Chen, Jin Li   +6 more
wiley   +1 more source

Near-infrared wavefront sensing [PDF]

, 2016
We discuss the advantages of wavefront sensing at near-infrared (IR) wavelengths with low-noise detector technologies that have recently become available.
Fusco, Thierry, Chun, Mark, Olivier Guyon, Simone Esposito, Francois Rigaut, Dekany, Richard, Hall, Donald, Guido Agapito, Wizinowich, Peter, Richard Dekany, Agapito, Guido, Mark Chun, Thierry Fusco, Donald Hall, Dimitri Mawet, Cedric Plantet, Peter Wizinowich, Mawet, Dimitri, Guyon, Olivier, Esposito, Simone, Plantet, Cedric, Rigaut, Francois, Dekany, Richard G   +22 more
core   +2 more sources

Wavefront Sensing via High Speed DSP

, 2004
Future light-weighted and segmented primary mirror systems require active optical control to maintain mirror positioning and figure to within nanometer tolerances.
Dean, Bruce, Smith, J. Scott
core  

Human Engineered Heart Tissues Reproduce Trigger‐ and Substrate‐Driven Mechanisms of Ventricular Tachycardia

Advanced Science, EarlyView.
Engineered heart tissues (EHTs) derived from human iPSCs replicate mechanisms of ventricular tachycardia at the tissue level. Acquired Long‐QT conditions cause early afterdepolarizations, wavebreak, and transient rotors; in contrast, focal cryoinjury forms a stable substrate that supports ongoing reentry.
Matthew Fiedler, Alejandra Vasquez Limeta, Ernesto Reyes Sanchez, Leah Carter, Francisco Altamirano   +4 more
wiley   +1 more source

Higher-resolution wavefront sensing based on sub-wavefront information extraction

Frontiers in Physics
The limited spatial sampling rates of conventional Shack–Hartmann wavefront sensors (SHWFSs) make them unable to sense higher-order wavefront distortion.
Hongli Guan, Hongli Guan, Hongli Guan, Hongli Guan, Wang Zhao, Wang Zhao, Wang Zhao, Shuai Wang, Shuai Wang, Shuai Wang, Kangjian Yang, Kangjian Yang, Kangjian Yang, Mengmeng Zhao, Mengmeng Zhao, Mengmeng Zhao, Shenghu Liu, Shenghu Liu, Shenghu Liu, Shenghu Liu, Han Guo, Han Guo, Han Guo, Ping Yang, Ping Yang, Ping Yang   +25 more
doaj   +1 more source

The TMT/NFIRAOS LGS wavefront sensing demonstration bench

, 2010
LGS wavefront sensing on ELTs is challenging. The tip-tilt indetermination, the cone effect, the star elongation, the sodium profiles fluctuations are the main problems plaguing LGS wavefront sensors.
R. Conan, K. Jackson, C. Bradley, G. Herriot, O. Lardière, Herriot, G., Jackson, K., Bradley, C., Lardière, O., Conan, R.   +9 more
core   +1 more source

Challenges for Wavefront Sensing and Correction beyond Large Astronomical Installations and Vision Science

, 2022
Paper PW4C.8, 2 S.The use of adaptive optics, wavefront sensing and wavefront correction beyond the large astronomical telescopes or vision science behoves careful analysis of the media being corrected for, and identification of non-traditional systems ...
Kong, Fanpeng, Gladysz, Szymon, Segel, Max, Lambert, Andrew, Zepp, Andreas, Cegarra Polo, Manuel   +5 more
core   +1 more source

Adaptive Active Illumination Via Translationally and Axially Tunable Cascaded Metasurfaces

Advanced Science, EarlyView.
Active three‐dimensional sensing faces a fundamental trade‐off between seeing farther and covering more of the scene. Translationally and axially tunable cascaded metasurfaces overcome this limitation by continuously adapting beam direction and illumination coverage.
Chi Zhang, Jianing Yang, Lingyun Zhang, Jingyu Bao, Bingbai Li, Qingsong Feng, Rui You, Xiaoli Jing, Fei Xing, Xiaoguang Zhao, Zheng You   +10 more
wiley   +1 more source