Moving M2 mirror without pointing offset

Roberto Ragazzoni; Fabio Bortoletto

doi:10.1117/12.48811

1 December 1991 Moving M2 mirror without pointing offset

Roberto Ragazzoni, Fabio Bortoletto

Proceedings Volume 1542, Active and Adaptive Optical Systems; (1991) https://doi.org/10.1117/12.48811
Event: San Diego, '91, 1991, San Diego, CA, United States

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.

Citation Download Citation

Roberto Ragazzoni and Fabio Bortoletto "Moving M2 mirror without pointing offset", Proc. SPIE 1542, Active and Adaptive Optical Systems, (1 December 1991); https://doi.org/10.1117/12.48811

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