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Proceedings Paper

Dispersion and anisoplanatic effects from the atmospheric density gradient
Author(s): James P. Stone; Patrick H. Hu; Jeff A. Goldstone; Kevin E. Jones
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Paper Abstract

For large zenith angles, the atmospheric density gradient causes differential refraction of beams at different wavelengths. As a result, the wavefronts of two different lasers differ not only because of diffractive effects but also because of the different pathway through atmospheric turbulence. The anisoplanatic effects of this pathway separation differ from a strict angular divergence of the beams because of the cumulative nature of the refractive bending. Differential equations describing ray trajectories and analytic expressions for piston- tilt removed anisoplanatic degradation will be presented. Analytic results will be compared with predictions of wave optics calculations. Explicit piston and tilt removal make the phase variances a direct measure of the optical quality usable directly to calculate strehls.

Paper Details

Date Published: 6 June 1993
PDF: 12 pages
Proc. SPIE 1871, Intense Laser Beams and Applications, (6 June 1993); doi: 10.1117/12.145225
Show Author Affiliations
James P. Stone, Rockwell International Corp./Rocketdyne Div. (United States)
Patrick H. Hu, Rockwell International Corp./Rocketdyne Div. (United States)
Jeff A. Goldstone, Rockwell International Corp./Rocketdyne Div. (United States)
Kevin E. Jones, Rockwell International Corp./Rocketdyne Div. (United States)

Published in SPIE Proceedings Vol. 1871:
Intense Laser Beams and Applications
William E. McDermott, Editor(s)

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