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Proceedings Paper

Wavefront reconstruction using self-referenced direct-drive adaptive optics
Author(s): Jacques E. Ludman; H. John Caulfield; Val N. Morozov
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Paper Abstract

Adaptive optical systems can be used to clean up atmospherically disturbed beams or to predistort a clean beam so that it phase compensates the atmospheric disturbance in passing back through the atmosphere (1-4). Such systems need to deal with the whole wavefront to smooth it, so global measurements must be processed to obtain that information. This mitigates against local, pixel-by-pixel independent operation of the active phase controller (SLM). Thus, a tension arises between the need for a global fit and the speed and convenience of purely local operation. A description of the entire front of the wave is necessary because no local measurement such as made by a shearing interferometer or the Hartmann test, can separate a global trend from a local fluctuation. These samples of derivatives must be integrated into a global pattern. On the other hand, global calculations take time. A purely local, adaptive optical system would be simpler and faster. We will show how to use global self—referencing to allow local adaptive optics to be used in a "pure optical" system - no conventional, discrete component optics will be needed, in principle

Paper Details

Date Published: 12 July 1993
PDF: 8 pages
Proc. SPIE 1806, Optical Computing, (12 July 1993); doi: 10.1117/12.147893
Show Author Affiliations
Jacques E. Ludman, Northeast Photosciences, Inc. (United States)
H. John Caulfield, Alabama A&M Univ. (United States)
Val N. Morozov, Univ. of Colorado/Boulder (United States)

Published in SPIE Proceedings Vol. 1806:
Optical Computing
Andrey M. Goncharenko; Fedor V. Karpushko; George V. Sinitsyn; Sergey P. Apanasevich, Editor(s)

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