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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 4 — Feb. 19, 2007
  • pp: 1534–1542

Atmospheric dispersion compensation for extremely large telescopes

Alexander V. Goncharov, Nicholas Devaney, and Christopher Dainty  »View Author Affiliations

Optics Express, Vol. 15, Issue 4, pp. 1534-1542 (2007)

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Achieving diffraction limited imaging with future ground-based optical telescopes will require adaptive optics for correction of atmospheric turbulence and also efficient techniques for atmospheric dispersion compensation. We study the benefit of using a linear atmospheric dispersion corrector (ADC) coupled with a deformable mirror on a 42-m Extremely Large Telescope (ELT) operating in the VIRJ spectral bands. The ADC design consists of two identical thin wedges made of F5 glass. The amount of dispersion introduced by the ADC is adjusted by translating one of the wedges along the optical axis so that it always cancels atmospheric dispersion as it varies with telescope elevation. We show that the ADC working in conjunction with a deformable mirror provides diffraction-limited image quality over a 1-arcmin field.

© 2007 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(110.6770) Imaging systems : Telescopes
(220.1000) Optical design and fabrication : Aberration compensation

ToC Category:
Imaging Systems

Original Manuscript: February 7, 2007
Manuscript Accepted: February 7, 2007
Published: February 19, 2007

Alexander V. Goncharov, Nicholas Devaney, and Christopher Dainty, "Atmospheric dispersion compensation for extremely large telescopes," Opt. Express 15, 1534-1542 (2007)

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