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Proceedings Paper

Active optical alignment of the Advanced Technology Solar Telescope
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Paper Abstract

The Advanced Technology Solar Telescope (ATST) is a complex off-axis Gregorian design to be used for solar astronomy. In order the counteract the effects of mirror and telescope structure flexure, the ATST requires an active optics alignment strategy. This paper presents an active optics alignment strategy that uses three wavefront sensors distributed in the ATST field-of-view to form a least-squares alignment solution with respect to RMS wavefront error. The least squares solution is realized by means of a damped least squares linear reconstructor. The results of optical modelling simulations are presented for the ATST degrees-of-freedom subject to random perturbations. Typical results include residual RMS wavefront errors less than 20 nm. The results quoted include up to 25 nm RMS wavefront sensor signal noise, random figure errors on the mirrors up to 500 nm amplitude, random decenter range up to 500 μm, and random tilts up to 10e - 03 degrees (36 arc-secs) range.

Paper Details

Date Published: 26 June 2006
PDF: 11 pages
Proc. SPIE 6271, Modeling, Systems Engineering, and Project Management for Astronomy II, 62710R (26 June 2006); doi: 10.1117/12.671826
Show Author Affiliations
Robert Upton, Association of Universities for Research in Astronomy (United States)
Thomas Rimmele, National Solar Observatory (United States)
Robert Hubbard, National Solar Observatory (United States)

Published in SPIE Proceedings Vol. 6271:
Modeling, Systems Engineering, and Project Management for Astronomy II
Martin J. Cullum; George Z. Angeli, Editor(s)

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