Atmospheric dispersion in very large telescopes with adaptive optics

Details Atmospheric dispersion in very large telescopes with adaptive optics Atmospheric dispersion in very large telescopes with adaptive optics

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997mnras.285..130w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 285, Issue 1, pp. 130-134.

Astronomy and Astrophysics

Astronomy

4

Atmospheric Effects, Instrumentation: Miscellaneous.

Scientific paper

Current work on correcting the effects of atmospheric turbulence on telescope imagery, so as to approach the diffraction limit, requires attention to related effects to exploit it fully. In particular adaptive optics, which acts by means of a flexible mirror, is therefore colour-blind, and requires a hitherto unknown level of correction of atmospheric dispersion if it is to be used more than a few degrees from zenith. Adaptive optics can only operate over a very limited field angle and wavelength range. Fine fast auto-guiding can give substantially improved imagery, over wider field angles and wavelength range, requiring higher performance dispersion correctors than heretofore. This note describes a dispersion corrector to meet both these needs.

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