Calibrating the interaction matrix for the LINC-NIRVANA high layer wavefront sensor

LINC-NIRVANA is a near-infrared Fizeau interferometric imager that will operate at the Large Binocular Telescope. In preparation for the commissioning of this instrument, we conducted experiments for calibrating the high-layer wavefront sensor of the layer-oriented multi-conjugate adaptive optics sy...

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Published in:Optics express 2012-03, Vol.20 (7), p.8078-8092
Main Authors: Zhang, Xianyu, Arcidiacono, Carmelo, Conrad, Albert R, Herbst, Thomas M, Gaessler, Wolfgang, Bertram, Thomas, Ragazzoni, Roberto, Schreiber, Laura, Diolaiti, Emiliano, Kuerster, Martin, Bizenberger, Peter, Meschke, Daniel, Rix, Hans-Walter, Rao, Changhui, Mohr, Lars, Briegel, Florian, Kittmann, Frank, Berwein, Juergen, Trowitzsch, Jan
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Language:English
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Calibration
Interferometry - instrumentation
Photometry - instrumentation
Telescopes
Transducers
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container_end_page 8092
container_issue 7
container_start_page 8078
container_title Optics express
container_volume 20
creator Zhang, Xianyu
Arcidiacono, Carmelo
Conrad, Albert R
Herbst, Thomas M
Gaessler, Wolfgang
Bertram, Thomas
Ragazzoni, Roberto
Schreiber, Laura
Diolaiti, Emiliano
Kuerster, Martin
Bizenberger, Peter
Meschke, Daniel
Rix, Hans-Walter
Rao, Changhui
Mohr, Lars
Briegel, Florian
Kittmann, Frank
Berwein, Juergen
Trowitzsch, Jan
description LINC-NIRVANA is a near-infrared Fizeau interferometric imager that will operate at the Large Binocular Telescope. In preparation for the commissioning of this instrument, we conducted experiments for calibrating the high-layer wavefront sensor of the layer-oriented multi-conjugate adaptive optics system. For calibrating the multi-pyramid wavefront sensor, four light sources were used to simulate guide stars. Using this setup, we developed the push-pull method for calibrating the interaction matrix. The benefits of this method over the traditional push-only method are quantified, and also the effects of varying the number of push-pull frames over which aberrations are averaged is reported. Finally, we discuss a method for measuring mis-conjugation between the deformable mirror and the wavefront sensor, and the proper positioning of the wavefront sensor detector with respect to the four pupil positions.
doi_str_mv 10.1364/OE.20.008078
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subjects Calibration
Interferometry - instrumentation
Photometry - instrumentation
Telescopes
Transducers
title Calibrating the interaction matrix for the LINC-NIRVANA high layer wavefront sensor
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