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Proceedings Paper

High-order adaptive optical system for big bear solar observatory
Author(s): Leonid V. Didkovsky; Alexander Dolgushyn; William Marquette; Jeff Nenow; John Varsik; Philip R. Goode; Steven L. Hegwer; Deqing Ren; Steve Fletcher; Kit Richards; Thomas Rimmele; Carsten J. Denker; Haimin Wang
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Paper Abstract

We present a high-order adaptive optical system for the 26-inch vacuum solar telescope of Big Bear Solar Observatory. A small elliptical tip/tilt mirror is installed at the end of the existing coude optical path on the fast two-axis tip/tilt platform with its resonant frequency around 3.3 kHz. A 77 mm diameter deformable mirror with 76 subapertures as well as wave-front sensors (correlation tracker and Shack-Hartman) and scientific channels for visible and IR polarimetry are installed on an optical table. The correlation tracker sensor can detect differences at 2 kHz between a 32×32 reference frame and real time frames. The WFS channel detects 2.5 kHz (in binned mode) high-order wave-front atmosphere aberrations to improve solar images for two imaging magnetographs based on Fabry-Perot etalons in telecentric configurations. The imaging magnetograph channels may work simultaneously in a visible and IR spectral windows with FOVs of about 180×180 arc sec, spatial resolution of about 0.2 arc sec/pixel and SNR of about 400 and 600 accordingly for 0.25 sec integration time.

Paper Details

Date Published: 11 February 2003
PDF: 10 pages
Proc. SPIE 4853, Innovative Telescopes and Instrumentation for Solar Astrophysics, (11 February 2003); doi: 10.1117/12.471341
Show Author Affiliations
Leonid V. Didkovsky, Big Bear Solar Observatory (United States)
Alexander Dolgushyn, Big Bear Solar Observatory (United States)
William Marquette, Big Bear Solar Observatory (United States)
Jeff Nenow, Big Bear Solar Observatory (United States)
John Varsik, Big Bear Solar Observatory (United States)
Philip R. Goode, Big Bear Solar Observatory (United States)
Steven L. Hegwer, National Solar Observatory (United States)
Deqing Ren, National Solar Observatory (United States)
Steve Fletcher, National Solar Observatory (United States)
Kit Richards, National Solar Observatory (United States)
Thomas Rimmele, National Solar Observatory (United States)
Carsten J. Denker, New Jersey Institute of Technology (United States)
Haimin Wang, New Jersey Institute of Technology (United States)


Published in SPIE Proceedings Vol. 4853:
Innovative Telescopes and Instrumentation for Solar Astrophysics
Stephen L. Keil; Sergey V. Avakyan, Editor(s)

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