Results 71 to 80 of about 13,728 (209)

Multichannel full-space coding metasurface with linearly-circularly-polarized wavefront manipulation

Nanophotonics
Achieving independent multitasked wavefront control by using an ultrathin plate is a challenge to increase information capacity in integration optics and radar applications.
Luo Huiling, Gao Huanhuan, Wang Yanzhao, Wang Chaohui, Zhang Fan, Shao Yanzhang, Liu Tong, Wang Zhengjie, Xu He-Xiu   +8 more
doaj   +1 more source

A Review of Wavefront Sensing and Control Based on Data-Driven Methods

Aerospace
Optical systems suffer from wavefront aberrations due to complex atmospheric environments and system component errors, leading to systematic aberrations and significantly degrading optical field quality. Therefore, the detection and correction of optical
Ye Zhang, Qichang An, Min Yang, Lin Ma, Liang Wang   +4 more
doaj   +1 more source

Wavefront shaping for ultrashort pulse delivery through optical fibers for imaging and ablation [PDF]

We demonstrate high power ultrashort pulse delivery through a commercially available multicore fiber (MCF) and a multimode graded-index fiber (GRINF) for imaging and laser ablation.
Moser, Christophe, Psaltis, Demetri, Loterie, Damien, Stasio, Nicolino, Kakkava, Eirini, Conkey, Donald B.   +5 more
core   +1 more source

Integrated Wavefront Sensing and Processing Method Utilizing Optical Neural Network

Photonics
Wavefront sensors and processors are vital components of adaptive optical (AO) systems, directly impacting the operating bandwidth. As application scenarios become increasingly complex, AO systems are confronted with more extreme atmospheric turbulence ...
Gang Luo, Yuanchao Geng, Deen Wang, Qiang Yuan, Dongxia Hu, Wanguo Zheng   +5 more
doaj   +1 more source

An embedded adaptive optics real time controller [PDF]

, 2007
The design and realisation of a low cost, high speed control system for adaptive optics (AO) is presented. This control system is built around a field programmable gate array (FPGA).
Saunter, Christopher D., Saunter, Christopher D   +1 more
core  

Closed-loop focal plane wavefront control with the SCExAO instrument [PDF]

, 2016
Aims. This article describes the implementation of a focal plane based wavefront control loop on the high-contrast imaging instrument SCExAO (Subaru Coronagraphic Extreme Adaptive Optics).
Frantz Martinache, Martinache, Frantz, Olivier Guyon, Jovanovic, Nemanja, Guyon, Olivier, Nemanja Jovanovic   +5 more
core   +1 more source

Output Feedback Displacement Control for Piezoelectric Deformable Mirrors With Unknown Hysteresis and Dynamics Coupling

IEEE Photonics Journal
Deformable mirrors (DMs) are key components of adaptive optics (AO) systems, enabling precise wavefront control in a wide range of applications.
Mohammad Al Saaideh, Lihong Zhang, Mohammad Al Janaideh   +2 more
doaj   +1 more source

Wavefront control in space with MEMS deformable mirrors [PDF]

, 2013
To meet the high contrast requirement of 1 × 10[superscript −10] to image an Earth-like planet around a Sun-like star, space telescopes equipped with coronagraphs require wavefront control systems.
Webber, Matthew William, Caitlin Kerr, Cahoy, Kerri, Matthew Webber, Novak, Benjamin G., Kerri L. Cahoy, Anne D. Marinan, Marinan, Anne D., Kerr, Caitlin E., Benjamin Novak   +9 more
core   +1 more source

Graphene Metasurface for THz Wavefront Control

JSAP-OSA Joint Symposia 2014 Abstracts, 2014
Terahertz (THz) technology is now becoming more important with the potential applications in biochemical sensing, security detection, and high-speed communication. However, because of lack of active materials for THz wave, wave control, e.g. intensity and phase distribution, is still challenging.
Yatooshi, Takumi, Ishikawa, Atsushi, Tsuruta, Kenji   +2 more
openaire   +1 more source

Correction of Aero-Optical Effect with Blow–Suction Control for Hypersonic Vehicles

Applied Sciences
High-speed turbulence induces significant aero-optical effects that severely disrupt the functionality of imaging systems of hypersonic vehicles. In this study, the aero-optical correction of various jet cooling modes is investigated using a Terminal ...
Yubo Li, Shuanghou Deng, Caijun Xue, Tianhang Xiao   +3 more
doaj   +1 more source