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Proceedings Paper

The simulation of the local seeing in segments active alignment
Author(s): Shu Yuan; Jing Lin
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Paper Abstract

For a ring segmented telescope and some others dilute aperture segmented telescope, active alignment is essential for closing the control loop. We choose an internal optical metrology to sense the tip and tilt of each segment for the active alignment. The local seeing is an important factor for the performance of this sensing. The effect of temperature gradient and turbulence near ground on the accuracy and frequency of the tip and tilt sensing is modeled. We conclude that the effect of local seeing must be considered for a low surface error of the primary mirror. Thermal control of the enclosure and telescope should be done for achieving a high accuracy and frequency active alignment.

Paper Details

Date Published: 10 November 2011
PDF: 6 pages
Proc. SPIE 8336, Integrated Modeling of Complex Optomechanical Systems, 83360I (10 November 2011); doi: 10.1117/12.915592
Show Author Affiliations
Shu Yuan, Yunnan Astronomical Observatory (China)
Jing Lin, Yunnan Astronomical Observatory (China)

Published in SPIE Proceedings Vol. 8336:
Integrated Modeling of Complex Optomechanical Systems
Torben Andersen; Anita Enmark, Editor(s)

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