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Proceedings Paper

Efficient method for the reduction of large piston errors in segmented-mirror telescopes
Author(s): Gary A. Chanan; Agusti Pinto
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Paper Abstract

Phase Discontinuity Sensing (PDS) is one of two successful approaches to segment phasing currently in use at the Keck telescopes, but it has only very limited capture range. In this work, we describe and present numerical simulations of a broadband version of the current (narrowband) PDS algorithm which can extend the capture range from 0.4 μm to 40 μm. Like the original algorithm, the new broadband PDS algorithm (BPDS) does not require any special-purpose hardware, only a high-resolution area detector operating in the 2 - 3 μm range. The potential application of this algorithm to Extremely Large Telescopes is also discussed.

Paper Details

Date Published: 7 July 2004
PDF: 9 pages
Proc. SPIE 5382, Second Backaskog Workshop on Extremely Large Telescopes, (7 July 2004); doi: 10.1117/12.566269
Show Author Affiliations
Gary A. Chanan, Univ. of California/Irvine (United States)
Agusti Pinto, Univ. of California/Irvine (United States)

Published in SPIE Proceedings Vol. 5382:
Second Backaskog Workshop on Extremely Large Telescopes
Arne L. Ardeberg; Torben Andersen, Editor(s)

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