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Proceedings Paper

Moving M2 mirror without pointing offset
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Paper Abstract

High precision movement of telescope mirrors in two-mirror telescopes is examined. Active optics are used for high precision movement of M2 during exposures to introduce a specific amount of decentering coma. It is shown that the decentering coma may be controlled by high accuracy rotation of the mirror around a point near the center of curvature of M2. Basic equations are developed for the displacement of the barycenter of the geometric blur. A relation is obtained for determining the correct position around which the rotation should be performed. The application of these techniques to two-mirror telescopes is discussed. Ray tracing and analytical results were compared and showed good agreement.

Paper Details

Date Published: 1 December 1991
PDF: 11 pages
Proc. SPIE 1542, Active and Adaptive Optical Systems, (1 December 1991); doi: 10.1117/12.48811
Show Author Affiliations
Roberto Ragazzoni, Astronomical Observatory of Padova (Italy)
Fabio Bortoletto, Astronomical Observatory of Padova (Italy)

Published in SPIE Proceedings Vol. 1542:
Active and Adaptive Optical Systems
Mark A. Ealey, Editor(s)

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