Solar Physics

, Volume 268, Issue 1, pp 103–123

The Wave-Front Correction System for the Sunrise Balloon-Borne Solar Observatory

  • T. Berkefeld
  • W. Schmidt
  • D. Soltau
  • A. Bell
  • H. P. Doerr
  • B. Feger
  • R. Friedlein
  • K. Gerber
  • F. Heidecke
  • T. Kentischer
  • O. v. d. Lühe
  • M. Sigwarth
  • E. Wälde
  • P. Barthol
  • W. Deutsch
  • A. Gandorfer
  • D. Germerott
  • B. Grauf
  • R. Meller
  • A. Álvarez-Herrero
  • M. Knölker
  • V. Martínez Pillet
  • S. K. Solanki
  • A. M. Title
Open Access
The Sunrise Balloon-Borne Observatory

Abstract

This paper describes the wave-front correction system developed for the Sunrise balloon telescope, and it provides information about its in-flight performance. For the correction of low-order aberrations, a Correlating Wave-Front Sensor (CWS) was used. It consisted of a six-element Shack – Hartmann wave-front sensor (WFS), a fast tip-tilt mirror for the compensation of image motion, and an active telescope secondary mirror for focus correction. The CWS delivered a stabilized image with a precision of 0.04 arcsec (rms), whenever the coarse pointing was better than ± 45 arcsec peak-to-peak. The automatic focus adjustment maintained a focus stability of 0.01 waves in the focal plane of the CWS. During the 5.5 day flight, good image quality and stability were achieved during 33 hours, containing 45 sequences, which lasted between 10 and 45 min.

Keywords

Adaptive optics Balloon Image stabilization Instrumentation Shack – Hartmann Tip-tilt correction Wavefront sensing 

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Copyright information

© The Author(s) 2010

Authors and Affiliations

  • T. Berkefeld
    • 1
  • W. Schmidt
    • 1
  • D. Soltau
    • 1
  • A. Bell
    • 1
  • H. P. Doerr
    • 1
  • B. Feger
    • 1
  • R. Friedlein
    • 1
  • K. Gerber
    • 1
  • F. Heidecke
    • 1
  • T. Kentischer
    • 1
  • O. v. d. Lühe
    • 1
  • M. Sigwarth
    • 1
  • E. Wälde
    • 1
  • P. Barthol
    • 2
  • W. Deutsch
    • 2
  • A. Gandorfer
    • 2
  • D. Germerott
    • 2
  • B. Grauf
    • 2
  • R. Meller
    • 2
  • A. Álvarez-Herrero
    • 6
  • M. Knölker
    • 4
  • V. Martínez Pillet
    • 3
  • S. K. Solanki
    • 2
  • A. M. Title
    • 5
  1. 1.Kiepenheuer-Institut für SonnenphysikFreiburgGermany
  2. 2.Max-Planck-Institut für SonnensystemforschungKatlenburg-LindauGermany
  3. 3.Instituto de Astrofísica de CanariasLa Laguna (Tenerife)Spain
  4. 4.High Altitude ObservatoryColoradoUSA
  5. 5.Lockheed Martin Solar and Astrophysics LaboratoryPalo AltoUSA
  6. 6.Instituto Nacional de Técnica AeroespacialTorrejón de Ardoz, MadridSpain

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