Results 51 to 60 of about 18,252,740 (310)

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  

Commissioning of ARGOS at LBT: adaptive optics procedures [PDF]

, 2015
ARGOS is the laser guide star facility of the Large Binocular Telescope (LBT). It implements a Rayleigh Laser Guide Star system that provides Ground Layer Adaptive Optics (GLAO) correction for the LUCIs, the 2 wide- field near-infrared imagers and multi ...
Deysenroth, Matthias, Gaessler, Wolfgang, Raab, Walfried, Raab, W., Organ de Xivry, G., Storm, J., Peter, D., Puglisi, Alfio, Sivitilli, A., Gemperlien, H., Gemperlein, Hans, Kulas, M., ESPOSITO, Simone, Borelli, Jose, Rabien, Sebastian, PUGLISI, Alfio Timothy, Ziegleder, Julian, Orban de Xivry, Gilles, Rahmer, G., Mazzoni, Tommaso, Sivitilli, Alex, Storm, Jesper, BONAGLIA, MARCO, Rahmer, Gustavo, Lefebvre, Michael, Peter, Diethard, Mazzoni, T., Lefebvre, M., Kulas, Martin, Ziegleder, J., BUSONI, LORENZO, Rabien, S.   +31 more
core   +1 more source

Influence of bandwidth error on the performance of adaptive optics systems for uncooperative beacons: plane wave and spherical wave analysis

, 2022
We discuss the capability of adaptive optics to increase the performance of laser systems operating in atmospheric turbulence. Our approach is based on the Zernike filter functions, Taylor’s frozen flow hypothesis and bandwidth limitations of a realistic
Gladysz, Szymon, Toselli, Italo
core   +1 more source

Organizing the interface—Plasma membrane architecture and receptor dynamics in virus‐cell interactions

FEBS Letters, EarlyView.
Plasma membranes contain dynamic nanoscale domains that organize lipids and receptors. Because viruses operate at similar scales, this architecture shapes early infection steps, including attachment, receptor engagement, and entry. Using influenza A virus and HIV‐1 as examples, we highlight how receptor nanoclusters, multivalent glycan interactions ...
Jan Schlegel, Christian Sieben
wiley   +1 more source

Correction of Distorted Wavefront Using Dual Liquid Crystal Spatial Light Modulators

Photonics, 2022
In space optical communication, owing to the influence of atmospheric turbulence, optical beams lose focus and become phase-distorted, which reduces the communication quality.
Jiali Wu, Xizheng Ke, Yaqi Yang, Jingyuan Liang, Mingyu Liu   +4 more
doaj   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

FEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee, Junho Jeong, Chae Yeong Lee, Hyunjoon Cho, Man Hwan Oh, Je Chul Lee, Jee‐Young Lee, Yangmee Kim   +7 more
wiley   +1 more source

Apollon Real-Time Adaptive Optics: astronomy-inspired wavefront stabilization in ultraintense lasers

High Power Laser Science and Engineering
Traditional wavefront control in high-energy, high-intensity laser systems usually lacks real-time capability, failing to address dynamic aberrations.
J. B. Ohland, N. Lebas, V. Deo, O. Guyon, F. Mathieu, P. Audebert, D. Papadopoulos   +6 more
doaj   +1 more source

Research on Adaptive Optics Image Restoration Algorithm by Improved Expectation Maximization Method

Abstract and Applied Analysis, 2014
To improve the effect of adaptive optics images’ restoration, we put forward a deconvolution algorithm improved by the EM algorithm which joints multiframe adaptive optics images based on expectation-maximization theory.
Lijuan Zhang, Dongming Li, Wei Su, Jinhua Yang, Yutong Jiang   +4 more
doaj   +1 more source

Interferometric wavefront sensing for extreme adaptive optics [PDF]

, 2004
Adaptive optics is concerned with the correction of phase distortions in wavefronts which degrade the quality of images produced by optical systems. It was originally developed for both astronomy and the military, where the Earth's atmosphere causes ...
Oag, Thomas J. D., Oag, Thomas J D
core  

Wavefront sensing over a 20-arcmin field in the ULTIMATE-Subaru Ground Layer Adaptive Optics system

, 2022
The ULTIMATE Ground Layer Adaptive Optics (GLAO) system is part of ULTIMATE-Subaru, the next generation facility instrumentation project at the Subaru telescope in Hawaii.
Rigaut, Francois, Noelia Martínez Rey, Travouillon, Tony, Bernard, Julien Tom, Kruse, Andrew, David Chandler, Ramasundara, Wasantha, Vaughn, Israel, Yosuke Minowa, Wasantha Ramasundara, Céline d'Orgeville, Herrald, Nicholas, D'Orgeville, Celine, Koki Terao, Yoshito . Ono, Martinez, Noelia, Terao, Koki, Minowa, Yosuke, Yoko Tanaka, Ono, Yoshito, Andrew W. Kruse, Julien Tom Bernard, Chandler, David, Tony Travouillon, Tanaka, Yoko, Haynes, Dionne, Nicholas Herrald, Dionne Haynes, Israel J. Vaughn, François Rigaut   +29 more
core   +1 more source