Share Email Print

Proceedings Paper

Wavefront reconstruction using self-referenced direct-drive adaptive optics
Author(s): Jacques E. Ludman; H. John Caulfield; Val N. Morozov
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

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)

© SPIE. Terms of Use
Back to Top