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Proceedings Article

High-order adaptive optical system for Big Bear Solar Observatory

[+] Author Affiliations
Leonid V. Didkovsky, Alexander Dolgushyn, William Marquette, Jeff Nenow, John Varsik, Philip R. Goode

Big Bear Solar Observatory (USA)

Steven L. Hegwer, Deqing Ren, Steve Fletcher, Kit Richards, Thomas Rimmele

National Solar Observatory (USA)

Carsten J. Denker, Haimin Wang

New Jersey Institute of Technology (USA)

Proc. SPIE 4853, Innovative Telescopes and Instrumentation for Solar Astrophysics, 630 (February 1, 2003); doi:10.1117/12.471341
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From Conference Volume 4853

  • Innovative Telescopes and Instrumentation for Solar Astrophysics
  • Stephen L. Keil; Sergey V. Avakyan
  • Waikoloa, Hawai'i, USA | August 22, 2002

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.

© (2003) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Leonid V. Didkovsky ; Alexander Dolgushyn ; William Marquette ; Jeff Nenow ; John Varsik, et al.
"High-order adaptive optical system for Big Bear Solar Observatory", Proc. SPIE 4853, Innovative Telescopes and Instrumentation for Solar Astrophysics, 630 (February 1, 2003); doi:10.1117/12.471341; http://dx.doi.org/10.1117/12.471341


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