Results 71 to 80 of about 1,039,039 (252)

Research on Wavefront Sensing Applications Based on Photonic Lanterns

Sensors
The Photonic Lantern (PL) is a novel fiber optic device emerging in wavefront sensing, which converts multimode fiber light fields into single-mode fields.
Zhengkang Zhao, Hangyu Zheng, Lianghua Xie, Jie Zhang, Zhuoyun Feng, Kaige Liu, Bin Zhu, Deen Wang, Ju Wang, Wei Liu, Qiang Yuan   +10 more
doaj   +1 more source

Micro-machined membrane deformable mirrors for cryogenic adaptive optics [PDF]

, 2002
In this Thesis, the suitability of 37 actuator Micro-machined membrane deformable mirrors (MMDM) for adaptive optics at cryogenic temperatures is evaluated. A method is described to safely cool MMDMs to 78K. The initial surface figures of three MMDMs are
Dyson, H.M., Dyson, Harold Michael
core  

TacScope: A Miniaturized Vision‐Based Tactile Sensor for Surgical Applications

Advanced Robotics Research, EarlyView.
TacScope is a compact, vision‐based tactile sensor designed for robot‐assisted surgery. By leveraging a curved elastomer surface with pressure‐sensitive particle redistribution, it captures high‐resolution 3D tactile feedback. TacScope enables accurate tumor detection and shape classification beneath soft tissue phantoms, offering a scalable, low‐cost ...
Md Rakibul Islam Prince, Sheeraz Athar, Pokuang Zhou, Yu She   +3 more
wiley   +1 more source

FPGA based wavefront sensor

, 2012
Verzerrungen in der Wellenfront einer Lichtwelle werden durch Laufzeitunterschiede im optischen Pfad hervorgerufen und verschlechtern die Qualität von abbildenden Systemen. Durch den Einsatz von Wellenfrontsensoren können relative Wellenfrontverzerrungen
Thier, Markus
core   +4 more sources

Pyramid Wavefront Sensor Using a Discrete Modulated Operation Method

IEEE Photonics Journal
The adaptive optics system (AOS) incorporating a modulated pyramid wavefront sensor (PWFS) represents a key area of exploration in current research aimed at enhancing the capabilities of future extremely large astronomical telescopes.
Lu Chen, Kainan Yao, Jianli Wang, Dianbing Chen, Mingda Ge, Zhiqiang Xu, Dongbo Che   +6 more
doaj   +1 more source

Defocused Image Deep Learning Designed for Wavefront Reconstruction in Tomographic Pupil Image Sensors

Mathematics, 2020
Mathematical modelling methods have several limitations when addressing complex physics whose calculations require considerable amount of time. This is the case of adaptive optics, a series of techniques used to process and improve the resolution of ...
Sergio Luis Suárez Gómez, Francisco García Riesgo, Carlos González Gutiérrez, Luis Fernando Rodríguez Ramos, Jesús Daniel Santos   +4 more
doaj   +1 more source

Space‐Time Metasurface Antenna Enabled High‐Dimensional Electromagnetic Modulation for Intrinsic Physical Layer Security

Advanced Science, EarlyView.
The concept of high‐dimensional EM modulation using the STMA for physical layer secure communication is illustrated in figure. The STMA consists of a series of programmable unit cells, with 1‐bit reconfigurable phase states (0/π). The STMA is excited by a monochromatic continuous wave (CW) at frequency fc and controlled by a field‐programmable gate ...
Xinyu Fang, Yiqing Sun, Chenfeng Yang, Siran Wang, Zheng Xing Wang, Kaixu Wang, Geng‐Bo Wu   +6 more
wiley   +1 more source

Light sheet adaptive optics microscope for 3D live imaging [PDF]

, 2013
Optical microscopy is still the main research tool for many biological studies. Indeed with the advent of genetic manipulation and specifically, the use of fluorescent protein expressing in animals and plants it has actually seen a renaissance in the ...
BOURGENOT, CYRIL,JULES,TUGDUAL
core  

Hierarchical Physical‐Cyber Encryption via Metasurface‐Encoded Holographic Keys

Advanced Science, EarlyView.
ABSTRACT Physical‐layer encryption based on metasurfaces has emerged as a promising alternative to conventional algorithmic cryptography by embedding security into physical processes. However, most existing metasurface‐based encryption schemes operate within single‐stage or static frameworks, where correct physical illumination directly reveals the ...
Zhen Liu, Changhong Dai, Wei Zhu, Ruisheng Yang, Bohan Zhang, Lei Zhang, Bobo Du, Shengxiang Wang, Guangwei Hu   +8 more
wiley   +1 more source

Performance prediction and procurement in practice : assessing the suitability of commodity cluster components for wavefront codes [PDF]

, 2009
The cost of state-of-the-art supercomputing resources makes each individual purchase a length and expensive process. Often each candidate architecture will need to be benchmarked using a variety of tools to assess likely performance.
Mills, A. B., Jarvis, S. A.; id_orcid, Herdman, J. A., Mudalige, Gihan R., Vadgama, A., Davis, J. A., Holt, J., Jarvis, Stephen A., Smith, J. A., Hammond, Simon D., Hammond, S. D., Miller, I., Mudalige, G. R.   +12 more
core   +1 more source