Control of adaptive optic element displacement with the help of a magnetic rheology drive

2000 ◽  
Author(s):  
Eugeny A. Deouline ◽  
Valeri P. Mikhailov ◽  
Victor V. Sytchev
Keyword(s):  
Adaptive Optic

Performance of the W.M. Keck Observatory Natural Guide Star Adaptive Optic Facility: the first year at the telescope

2000 ◽  
Author(s):  
Peter L. Wizinowich ◽  
D. Scott Acton ◽  
Olivier Lai ◽  
John Gathright ◽  
William Lupton ◽  
...  
Keyword(s):  
Adaptive Optic ◽  
First Year ◽  
Guide Star

Status of the NGS adaptive optic system at the MMT Telescope

2004 ◽  
Author(s):  
Douglas L. Miller ◽  
Guido Brusa ◽  
Matthew A. Kenworthy ◽  
Philip M. Hinz ◽  
Don L. Fisher
Keyword(s):  
Adaptive Optic ◽  
Optic System ◽  
Adaptive Optic System

Numerical Simulation of Target-in-the-Loop Adaptive Optic Systems Based on Fiber-Laser Array

2011 ◽  
Vol 31 (11) ◽  
pp. 1114002
Author(s):  
陶汝茂 Tao Rumao ◽  
司磊 Si Lei ◽  
马阎星 Ma Yanxing ◽  
邹永超 Zou Yongchao ◽  
周朴 Zhou Pu
Keyword(s):  
Numerical Simulation ◽  
Fiber Laser ◽  
Adaptive Optic ◽  
Laser Array ◽  
Optic Systems

H∞ Suboptimal controller design for adaptive optic systems

2018 ◽  
Vol 41 (8) ◽  
pp. 2100-2113
Author(s):  
Bilal Erol ◽  
Berk Altıner ◽  
Erkan Adalı ◽  
Akın Delibaşı
Keyword(s):  
Atmospheric Turbulence ◽  
Disturbance Rejection ◽  
Controller Design ◽  
Adaptive Optic ◽  
Wavefront Aberrations ◽  
Alternative Approach ◽  
Specific Frequency ◽  
Balanced Model ◽  
Optic Systems ◽  
Orthogonal Set

In this paper, an alternative approach to conventional [Formula: see text] control is proposed for adaptive optic (AO) systems. In order to account for the dynamics of the deformable mirror (DM), the Kirchhoff plate equation is considered. Phase wavefront aberrations, which are the effect of atmospheric turbulence, are modelled using the orthogonal set of Zernike polynomials. The first part of this study concerns the derivation of mathematical models for the DM and the atmospheric turbulence. The AO systems used for disturbance rejection concentrate on a specific frequency band, as the disturbance occurs in that region. However, the conventional weighted [Formula: see text] controller is not applicable due to its order. The proposed controller handles this problem by using frequency weighted balanced model reduction. The efficiency of the proposed approach is examined on Zernike’s tip and tilt, focus, astigmatism, coma, trefoil, spherical, secondary astigmatism and quadrafoil modes.

Compact metrology beamline for EUV optic and adaptive optic tests (Conference Presentation)

2018 ◽  
Author(s):  
Philippe Zeitoun ◽  
Domenico Alj ◽  
Hugo Dacasa ◽  
Ombeline de La Rochefoucauld
Keyword(s):  
Adaptive Optic

Closed-loop adaptive optic comparison between a Shack-Hartmann and a distorted-grating wavefront sensor

2004 ◽  
Author(s):  
Paul Harrison ◽  
Gavin R. G. Erry ◽  
Leonard J. Otten III ◽  
D. M. Cuevas ◽  
Lawrence D. Weaver
Keyword(s):  
Closed Loop ◽  
Adaptive Optic ◽  
Wavefront Sensor
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