title: Emulation of dual-conjugate adaptive optics on an 8-m class telescope.
abstract: In this article we present a downscaled laboratory setup emulating five natural guide stars, a layered static atmosphere and a 7.5-m aperture telescope equipped with dual-conjugate adaptive optics at a wavelength of 2.2 microm. Three reconstruction alternatives were evaluated; conventional adaptive optics, field-averaged conventional adaptive optics and dual-conjugate adaptive optics. The results were compared with Zemaxsimulations of the setup. The expected increase of the size of the isoplanatic patch, using dual-conjugate adaptive optics, was confirmed.
authors.forename: Per
authors.initials: P
authors.lastname: Knutsson
authors.forename: Mette
authors.initials: M
authors.lastname: Owner-Petersen