Publications

Authors:

E., Fedrigo; Muradore, Riccardo; D., Zilio

Title:

High performance adaptive optics system with fine tip/tilt control

Year:

2009

Type of item:

Articolo in Rivista

Tipologia ANVUR:

Articolo su rivista

Language:

Inglese

Referee:

No

Name of journal:

CONTROL ENGINEERING PRACTICE

ISSN of journal:

0967-0661

N° Volume:

17

Page numbers:

122-135

Keyword:

Adaptive optics; Kalman filtering

Short description of contents:

Adaptive optics is a technique that uses the measurements of a wave front sensor to flatten distorted wave fronts with a deformable mirror in a feedback loop in order to provide diffraction-limited performance with ground-based telescopes. In order to achieve the highest possible Strehl, a measure of performance, the measurement and the control of the most important disturbances (tip and tilt) have to be optimized. These modes, in spite of being the first modes to be controlled, have the biggest impact on the final performance of the system. This paper concentrates on the estimation and control of the atmospheric tip/tilt leaving out for the moment other sources of error that originate inside the telescope in form of vibrations. It will be shown that the proposed control strategy can reduce the residual variance of the controlled modes by a factor 2 and that, if applied to all modes, can achieve a significantly better Strehl.

Product ID:

66138

Handle IRIS:

11562/391067

Deposited On:

February 24, 2012

Last Modified:

November 15, 2022

Bibliographic citation:

E., Fedrigo; Muradore, Riccardo; D., Zilio, High performance adaptive optics system with fine tip/tilt control «CONTROL ENGINEERING PRACTICE» , vol. 17 , 2009 , pp. 122-135

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