20 July 2000 Ultimate test results on the active optics system of the Galileo Telescope
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Abstract
The Galileo Telescope is a Ritchey-Chretienne telescope with an aperture of 3.58 meters and is located in La Palma Island. Since the first light in June 1998, several nights have been used to calibrate and to test the active optics systems, an operation involving also the control and reduction software and the optics of the de-rotator system. At the moment the active optics system routinely works at the beginning of the nights to support both technical and scientific observations. The ultimate tests on the control system are here reported and its performances are analyzed in order to quantify the final optical quality. Also a brief report on the effects of the serrourier temperature is reported. A comparison between Shack-Hartmann analysis performed on the rotator adapter bench and wavefront analysis on the instrument focal plane (at Nasmith station) is also reported. Some images taken in the visible and near infrared ranges during the same night are shown.
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Claudio Pernechele, Fabio Bortoletto, Daniele Gardiol, Adriano Ghedina, Enrico Marchetti, "Ultimate test results on the active optics system of the Galileo Telescope", Proc. SPIE 4003, Optical Design, Materials, Fabrication, and Maintenance, (20 July 2000); doi: 10.1117/12.391502; https://doi.org/10.1117/12.391502
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KEYWORDS
Telescopes

Active optics

Mirrors

Wavefront sensors

Monochromatic aberrations

Control systems

Lanthanum

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