Results 61 to 70 of about 30,065 (244)

The Subaru Coronagraphic Extreme Adaptive Optics system: enabling high-contrast imaging on solar-system scales [PDF]

, 2015
The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument is a multipurpose high-contrast imaging platform designed for the discovery and detailed characterization of exoplanetary systems and serves as a testbed for high-contrast imaging ...
Baba, N., Clergeon, C., Close, L., Doughty, D., Duchene, G., Garrel, V., Gauchet, L., Guyon, O., Hayano, Y., Huby, E., Jovanovic, N., Kotani, T., Kudo, T., Kuhn, J., Lacour, S., Lai, O., Lozi, J., Males, J., Marchis, F., Martinache, F., Matsuo, T., Minowa, Y., Morino, J., Murakami, N., Newman, K., Nishikawa, J., Norris, B., Oshiyama, F., Perrin, G., Schworer, G., Serabyn, E., Singh, G., Stewart, P., Takato, N., Tamura, M., Tuthill, P., Vievard, S., Woillez, J.   +37 more
core   +3 more sources

Stochastic Optimization for Adaptive Real-Time Wavefront Correction

Numerical Algorithms, 2003
We have investigated the performance of an adaptive optics system subjected to changing atmospheric conditions, under the guidance of the ALOPEX stochastic optimization. Atmospheric distortions are smoothed out by means of a deformable mirror, the shape of which can be altered in order to follow the rapidly changing atmospheric phase fluctuations. In a
Ζακυνθινακη Μαρια(http://users.isc.tuc.gr/~mzakynthinaki), Zakynthinaki Maria(http://users.isc.tuc.gr/~mzakynthinaki), Σαριδακης Ιωαννης(http://users.isc.tuc.gr/~gsaridakis), Saridakis Ioannis(http://users.isc.tuc.gr/~gsaridakis)   +3 more
openaire   +4 more sources

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

Study on the Difference of Wavefront Distortion on Beams Caused by Wavelength Differences in Weak Turbulence Region

Photonics, 2023
In dual-wavelength free-space optical communication systems, the wavefront distortion differences caused by the wavelength difference of the signal and beacon lights cannot be completely corrected.
Jiali Wu, Xizheng Ke, Weilong Kang, Jingyuan Liang, Chenghu Ke   +4 more
doaj   +1 more source

Electric Field Conjugation with the Project 1640 coronagraph

, 2013
The Project 1640 instrument on the 200-inch Hale telescope at Palomar Observatory is a coronagraphic instrument with an integral field spectrograph at the back end, designed to find young, self-luminous planets around nearby stars. To reach the necessary
Baranec, Christoph, Beichman, Charles, Brenner, Douglas, Burruss, Rick, Cady, Eric, Crepp, Justin, Dekany, Richard, Hale, David, Hillenbrand, Lynne, Hinkley, Sasha, Ligon, E. Robert, Lockhart, Thomas, Oppenheimer, Ben R., Parry, Ian, Pueyo, Laurent, Rice, Emily, Roberts, Jennifer, Roberts, Jr., Lewis C., Shao, Michael, Sivaramakrishnan, Anand, Soummer, Remi, Tang, Hong, Truong, Tuan, Vasisht, Gautam, Vescelus, Fred, Wallace, J. Kent, Zhai, Chengxing, Zimmerman, Neil   +27 more
core   +1 more source

Structural Eigenmodes of the Brain to Improve the Source Localization of EEG: Application to Epileptiform Activity

Advanced Science, EarlyView.
Geometry and connectivity are complementary structures, which have demonstrated their ability to represent the brain's functional activity. This study evaluates geometric and connectome eigenmodes as biologically informed constraints for EEG source localization.
Pok Him Siu, Philippa J. Karoly, Sina Mansour L., Artemio Soto‐Breceda, Levin Kuhlmann, Mark J. Cook, David B. Grayden   +6 more
wiley   +1 more source

Optimal Dark Hole Generation via Two Deformable Mirrors with Stroke Minimization

, 2011
The past decade has seen a significant growth in research targeted at space based observatories for imaging exo-solar planets. The challenge is in designing an imaging system for high-contrast.
Belikov, Ruslan, Elwain, Michael Mc, Give'on, Amir, Groff, Tyler, Kasdin, N. Jeremy, Kay, Jason, Pueyo, Laurent   +6 more
core   +1 more source

New challenges for Adaptive Optics: Extremely Large Telescopes [PDF]

, 2000
The performance of an adaptive optics (AO) system on a 100m diameter ground based telescope working in the visible range of the spectrum is computed using an analytical approach.
A. Tokovinin, M. Le Louarn, M. Sarazin, Max, N. Hubin   +4 more
core   +3 more sources

Direct Photocurrent Detection of Optical Vortex Based on the Orbital Photo Galvanic Effect: Progress, Challenge, and Perspective

Advanced Science, EarlyView.
Direct orbital angular momentum (OAM) detection through the orbital photogalvanic effect offers a scalable route for integrated optoelectronics. This perspective evaluates symmetry‐driven material selection and demonstrates how electrode matrices enable the resolution of complex, mixed OAM modes.
Jinluo Cheng, Dehong Yang, Weiming Wang, Chang Xu, Zipu Fan, Dong Sun   +5 more
wiley   +1 more source

Neutrophil‐Driven Cascade‐Targeted Nanocarriers Restore Mitochondrial Homeostasis to Ameliorate Renal Ischemia–Reperfusion Injury

Advanced Science, EarlyView.
A neutrophil‐mediated dual‐targeting liposome (NKN‐LNP) is developed to treat renal ischemia–reperfusion injury. The system enables spatiotemporally controlled delivery of NMN to injured tubules via MMP‐2/9 activation and KIM1 recognition, restoring mitochondrial function through NAD+‐SIRT3 signaling and preventing the transition from acute kidney ...
Hangbin Ma, Yang Li, Shen Lin, Feifan Chu, Gaozhan Ren, Yinhui Mao, Mingzhi Wu, Yuning Ma, Qiwei Ji, Zujie Chen, Jinzhong Ji, Mingxin Sun, Yongpeng Xu, Xiaoli Sun, Longguang Tang, Hao Zhou   +15 more
wiley   +1 more source