scholarly journals Experimental validation of optimization concepts for focal-plane image processing with adaptive optics

Author(s):  
Visa Korkiakoski ◽  
Christoph U. Keller ◽  
Niek Doelman ◽  
Rufus Fraanje ◽  
Raluca Andrei ◽  
...  
2019 ◽  
Vol 488 (3) ◽  
pp. 4307-4316 ◽  
Author(s):  
Olivier Herscovici-Schiller ◽  
Jean-François Sauvage ◽  
Laurent M Mugnier ◽  
Kjetil Dohlen ◽  
Arthur Vigan

Abstract Quasi-static aberrations in coronagraphic systems are the ultimate limitation to the capabilities of exoplanet imagers both ground-based and space-based. These aberrations – which can be due to various causes such as optics alignment or moving optical parts during the observing sequence – create light residuals called speckles in the focal plane. Those speckles might be mistaken for planets. For ground-based instruments, the presence of residual turbulent wavefront errors due to partial adaptive optics correction causes an additional difficulty to the challenge of measuring aberrations in the presence of a coronagraph. In this paper, we present an extension of COFFEE, the coronagraphic phase diversity, to the estimation of quasi-static aberrations in the presence of adaptive-optics-corrected residual turbulence. We perform realistic numerical simulations to assess the performance that can be expected on an instrument of the current generation. We perform the first experimental validation in the laboratory, which demonstrates that quasi-static aberrations can be corrected during the observations by means of coronagraphic phase diversity.


1994 ◽  
Vol 158 ◽  
pp. 167-170
Author(s):  
E.K. Hege ◽  
J.R.P. Angel ◽  
A.D. Gleckler ◽  
K.P. Pflibsen ◽  
B.L. Ulich

We propose an optimized design for the redeployment of the Multiple Mirror Telescope (MMT) primary optics as a 25 m Adaptive Steerable Imaging Array (ASIA) providing direct focal plane image formation. The design incorporates concepts of active telescope alignment and adaptive optics proven in the existing MMT. Basing predictions on contemporary radio telescope mount technology, 45 m to 100 m optical baselines may be practical.


1991 ◽  
Author(s):  
Sabrina E. Kemeny ◽  
Sayed I. Eid ◽  
Sunetra K. Mendis ◽  
Eric R. Fossum

1997 ◽  
Vol 44 (10) ◽  
pp. 1777-1782 ◽  
Author(s):  
E. Funatsu ◽  
Y. Nitta ◽  
Y. Miyake ◽  
T. Toyoda ◽  
J. Ohta ◽  
...  

1996 ◽  
Author(s):  
Gregory L. Tarr ◽  
Richard A. Carreras ◽  
Christopher R. DeHainaut ◽  
Xavier Clastres ◽  
Laurent Freyss ◽  
...  

SIMULATION ◽  
1995 ◽  
Vol 65 (1) ◽  
pp. 11-25 ◽  
Author(s):  
Tuan Duong ◽  
Sabrina Kemeny ◽  
Taher Daud ◽  
Anil Thakoor ◽  
Chris Saunders ◽  
...  

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