Results 171 to 180 of about 2,240 (218)

The MARTINI adaptive optics instrument

New Astronomy, 2000
Abstract The Multi-Aperture Real Time Image Normalisation Instrument (MARTINI) is an adaptive optics system designed to operate at one of the Nasmyth focal stations of the 4.2 m William Herschel Telescope. Correction of atmospherically distorted images is achieved by the action of a six element segmented mirror in a real-time servo loop controlled by
A.P. Doel, C.N. Dunlop, D.F. Buscher, R.M. Myers, R.M. Sharples, J.V. Major   +5 more
openaire   +1 more source

Optical Design of Clinical Adaptive Optics Instruments for Retinal Imaging

Frontiers in Optics 2010/Laser Science XXVI, 2010
Simple design rules can be used to reduce astigmatism in off-axis reflective ophthalmic adaptive optics instruments. These rules will be illustrated by presenting the design of such devices with footprints smaller than a square foot.
A. Dubra, A. Gómez-Vieyra, Y. Sulai, Luis Díaz-Santana   +3 more
openaire   +1 more source

Adaptive optics for second-generation VLT instruments

SPIE Proceedings, 2004
In this article, we present the VLT second generation instruments and we summarize the concept and capabilities of the Very Large Telescope (VLT) Adaptive Optics (AO) Facility. This Facility, composed mainly of a deformable secondary mirror and four laser guide stars (LGSs), aims at providing an adaptive optics infrastructure to feed multiple ...
Miska Le Louarn, Norbert N. Hubin, Robin Arsenault   +2 more
openaire   +1 more source

New wavefront sensing concepts for adaptive optics instrumentation

SPIE Proceedings, 2012
For the last few years, Laboratory of Astrophysics of Marseille has been carrying out several R and D activities in Adaptive Optics (AO) instrumentation for Extremely Large Telescopes (ELTs). In the European ELT (D = 40 m) framework, both theoretical and experimental studies are jointly led.
K. El Hadi, M. Gray, T. Fusco, B. Le Roux   +3 more
openaire   +1 more source

Instrumental Limitations In Adaptive Optics For Astronomy

SPIE Proceedings, 1989
The technology and components required to implement discrete adaptive optics systems capable of compensating wavefront errors caused by atmospheric turbulence in ground-based astronomical telescopes are reviewed. Characteristics of the major types of deformable mirrors, wavefront sensors and wavefront reconstructors are described. The effects of device
openaire   +1 more source

Development of infrared instrumentation for the Chicago Adaptive Optics System

SPIE Proceedings, 1998
With the increasing number of adaptive optics (AO) systems being developed for major observatories, it is important to understand the requirements and the capabilities of the IR instrumentation that will utilize these systems. During the past two years, we have constructed and upgraded an IR camera system based on the NICMOS 3 IR array for the Chicago ...
James E. Larkin, Edward J. Kibblewhite
openaire   +1 more source

Compact multimodal adaptive-optics spectral-domain optical coherence tomography instrument for retinal imaging

Journal of the Optical Society of America A, 2007
We have developed a compact, multimodal instrument for simultaneous acquisition of en face quasi-confocal fundus images and adaptive-optics (AO) spectral-domain optical coherence tomography (SDOCT) cross-sectional images. The optical system including all AO and SDOCT components occupies a 60x60 cm breadboard that can be readily transported for clinical
Chad E, Bigelow, Nicusor V, Iftimia, R Daniel, Ferguson, Teoman E, Ustun, Benjamin, Bloom, Daniel X, Hammer   +5 more
openaire   +2 more sources

Repeatability of Aberrometric Measurements With a New Instrument for Vision Analysis Based on Adaptive Optics

Journal of Refractive Surgery, 2015
PURPOSE: To evaluate intersession and intrasession repeatability of aberration data obtained with a new visual simulator based on adaptive optics, which includes a Hartmann-Shack aberrometer (Adaptive Optics Vision Analyzer; Voptica S.L., Murcia, Spain).
Otero Molins, Carles, Vilaseca Ricart, Meritxell, Arjona Carbonell, Mª Montserrat, Martínez Roda, Juan Antonio, Pujol Ramo, Jaume   +4 more
openaire   +4 more sources

Operational concept of the VLT's adaptive optics facility and its instruments

SPIE Proceedings, 2012
The ESO Adaptive Optics Facility (AOF) will transform UT4 of the VLT into a laser driven adaptive telescope in which the corrective optics, specifically the deformable secondary mirror, and the four Laser Guide Star units are integrated. Three instruments, with their own AO modules to provide field selection capabilities and wavefront sensing, will ...
H. Kuntschner, P. Amico, J. Kolb, P. Y. Madec, R. Arsenault, M. Sarazin, D. Summers   +6 more
openaire   +1 more source

9. Instrumentation for adaptive optics

2016
AO was first proposed in astronomy, to enable ground-based telescopes to overcome the deleterious effects of atmospheric turbulence [1], and for many years the technique was restricted to large engineering teams in astronomy and military applications [2].
openaire   +1 more source