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Proceedings Paper

Stellar image stabilization using piezo-driven active mirrors
Author(s): Andrew Peter Doel; Colin N. Dunlop; John Victor Major; Richard M. Myers; Alan Purvis; M. G. Thompson
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Paper Abstract

As applied to the 4.2-m William Herschel Telescope, the multiaperture real-time image-normalization system presented implies a wavefront whose size requires a mask of six optimally-scaled subapertures. These subaperture images are separated and examined on a single image photon detector which yields x, y, and t coordinates for each recorded photon. The motions of these images feed back to six independent piezoactuated active mirrors which act to null the image motions at a CCD focus. Data are presented from two image normalization runs, with and without active mirrors, which illustrate the size and variation behavior of the coherent seeing length, characteristic seeing times, and power spectra.

Paper Details

Date Published: 1 July 1990
PDF: 14 pages
Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); doi: 10.1117/12.19198
Show Author Affiliations
Andrew Peter Doel, Univ. of Durham (United Kingdom)
Colin N. Dunlop, Univ. of Durham (United Kingdom)
John Victor Major, Univ. of Durham (United Kingdom)
Richard M. Myers, Univ. of Durham (United Kingdom)
Alan Purvis, Univ. of Durham (United Kingdom)
M. G. Thompson, Univ. of Durham (United Kingdom)


Published in SPIE Proceedings Vol. 1236:
Advanced Technology Optical Telescopes IV
Lawrence D. Barr, Editor(s)

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