Results 11 to 20 of about 33,132 (307)

The MAORY first-light adaptive optics module for E-ELT [PDF]

, 2015
The MAORY adaptive optics module is part of the first light instrumentation suite for the E-ELT. The MAORY project phase B is going to start soon.
Ragazzoni R., De Caprio V., Agapito G., Cortecchia F., Delboulbe A., Henault F., Riva M., Giro E., Bonaglia M., Lauria M., Pareschi G., Biliotti V., Briguglio R., Verinaud C., Esposito S., Busoni L., Spano P., Giordano C., Rochat S., Ramsay S., Bregoli G., Oberti S., Ferruzzi D., Ventura N., Arcidiacono C., Lafrasse S., Baruffolo A., Cascone E., Rabou P., Carbonaro L., Felini C., Schreiber L., Bellazzini M., Foppiani I., Xompero M., Roussel F., De Rosa A., Fiorentino G., De Pascale M., Ciliegi P., Ghigo M., Sztefek M. -H., Saracco P., Spavone M., Fini L., Magnard Y., Maurel D., Puglisi A., Roux A., Maiorano E., Le Coarer E., Di Rico G., Riccardi A., Morgante G., Cosentino G., Mapelli M., Moulin T., Fantinel D., Butler R. C., Jocou L., Lombini M., Marchetti E., Gluck L., Michaud L., Feautrier P., Zerbi F. M., Carlotti A., Diolaiti E., Ricciardi S., Abicca R., Mannucci F., Salasnich B., Zins G., Correia J. -J., Patti M., Stadler E., Casali M., Kerber F., Brissaud O., Del Vecchio C.   +79 more
core   +2 more sources

Large lightweight segmented mirrors for adaptive optics

, 2022
Paper 70153UThis paper examines the possibility of constructing deformable mirrors for adaptive optics with a large number of degrees of freedom, by assembling segmented silicon mirrors with bimorph piezoelectric actuation.
Preumont, A., Roose, S., Bastaits, R., Gebhardt, S., Rodrigues, G., Stockman, Y., Schoenecker, A., Villon, P.   +7 more
core   +1 more source

Adaptive optics for optical microscopy [Invited]

Biomedical Optics Express, 2023
Optical microscopy is widely used to visualize fine structures. When applied to bioimaging, its performance is often degraded by sample-induced aberrations. In recent years, adaptive optics (AO), originally developed to correct for atmosphere-associated aberrations, has been applied to a wide range of microscopy modalities, enabling high- or super ...
Qinrong Zhang, Qi Hu, Caroline Berlage, Peter Kner, Benjamin Judkewitz, Martin Booth, Na Ji   +6 more
openaire   +2 more sources

Optical Fiber Bundle-Based High-Speed and Precise Micro-Scanning for Image High-Resolution Reconstruction

Sensors, 2021
We propose an imaging method based on optical fiber bundle combined with micro-scanning technique for improving image quality without complex image reconstruction algorithms.
Jiali Jiang, Xin Zhou, Jiaying Liu, Likang Pan, Ziting Pan, Fan Zou, Ziqiang Li, Feng Li, Xiaoyu Ma, Chao Geng, Jing Zuo, Xinyang Li   +11 more
doaj   +1 more source

Quaternary adaptive optics

Optics Express, 2019
We present a new Point Diffraction Interferometer (PDI). Binary adaptive optics (BAO) and Quaternary Adaptive Optics (QAO) can be performed with the help of this PDI as a wavefront sensor. The PDI interferogram, once binarized, is used in two consecutive steps to produce a quaternary mask with phase values 0, π/2, π and 3π/2.
Manuel P. Cagigal, Antonio Fuentes, Miguel A. Cagigas, Pedro J. Valle, Xesús Prieto-Blanco, Vidal F. Canales   +5 more
openaire   +3 more sources

The Measurement and Correction of Atmospheric Dispersion in 4-Meter Telescope With Adaptive Optical System

IEEE Photonics Journal, 2023
Atmospheric dispersion is a wavelength-dependent effect that affects astronomical observations performed using ground-based telescopes. The effect of atmospheric dispersion for a 4-meter telescope is analyzed and an atmospheric dispersion corrector (ADC)
Guoqing Gao, Hao Chen, Yuanyuan Tang, Wenru Li, Hua Bao, Lingxiao Li   +5 more
doaj   +1 more source

Precision astrometry with adaptive optics [PDF]

SPIE Proceedings, 2008
We investigate the limits of ground-based astrometry with adaptive optics using the core of the Galactic globular cluster M5. Adaptive optics systems provide near diffraction-limit imaging with the world's largest telescopes. The substantial improvement in both resolution and signal-to-noise ratio enables high-precision astrometry from the ground.
Cameron, P. B., Britton, M. C., Kulkarni, S. R.   +2 more
openaire   +5 more sources

The giant magellan telescope laser tomography adaptive optics system [PDF]

, 2016
The Giant Magellan Telescope presents a unique optical design with seven 8.4 m diameter primary mirrors matched by seven adaptive secondary mirrors (ASM).
Rigaut, Francois, Conan, Rodolphe, d'Orgeville, Celine, Bouchez, A, van Dam, Marcos Alejandro, Bennet, Francis, Uhlendorf, Kristina, Parcell, Simon, Piatrou, Piotr, Trancho, Gelys, Espeland, Brady, Gardhouse, William, Price, Ian   +12 more
core   +1 more source

No-Reference Quality Assessment of Extended Target Adaptive Optics Images Using Deep Neural Network

Sensors, 2023
This paper proposes a supervised deep neural network model for accomplishing highly efficient image quality assessment (IQA) for adaptive optics (AO) images.
Guoqing Gao, Lingxiao Li, Hao Chen, Ning Jiang, Shuqi Li, Qing Bian, Hua Bao, Changhui Rao   +7 more
doaj   +1 more source

Size of the halo of the adaptive optics PSF

, 2022
Paper 844725It is a widely accepted conjecture that the width of the incoherent halo in an adaptive optics point-spread function (PSF) should decrease with the level of correction.
Gladysz, Szymon, Kann, L., Louarn, M. le, Yaitskova, N., Drummond, J., Johnson, R., Roskey, D., Garcia-Rissmann, A.   +7 more
core   +1 more source