Stellar image stabilization using piezo-driven active mirrors

Andrew Peter Doel; Colin N. Dunlop; John Victor Major; Richard M. Myers; Alan Purvis; M. G. Thompson

doi:10.1117/12.19198

1 July 1990 Stellar image stabilization using piezo-driven active mirrors

Andrew Peter Doel, Colin N. Dunlop, John Victor Major, Richard M. Myers, Alan Purvis, M. G. Thompson

Proceedings Volume 1236, Advanced Technology Optical Telescopes IV; (1990) https://doi.org/10.1117/12.19198
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

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.

Citation Download Citation

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); https://doi.org/10.1117/12.19198

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