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1 July 1990 Stellar image stabilization using piezo-driven active mirrors
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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.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Andrew Peter Doel, Colin N. Dunlop, John Victor Major, Richard M. Myers, Alan Purvis, and M. G. Thompson "Stellar image stabilization using piezo-driven active mirrors", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990);

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