High-order adaptive optical system for Big Bear Solar Observatory

Leonid V. Didkovsky, Alexander I. Dolgushyn, William H. Marquette, Jeff Nenow, John R. Varsik, Philip R. Goode, Steve Hegwer, Deqing Ren, Steve Fletcher, Kit Richards, Thomas R. Rimmele, Carsten Denker, Haimin Wang

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)630-639
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4853
DOIs
StatePublished - Dec 1 2002

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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