Abstract
A Zernike decomposition of the pupil phase variance that is due to focus anisoplanatism for a sodium laser guide star is calculated, including the angular error variance associated with overall tilt. This quantity, or tilt focus anisoplanatism , is necessary in evaluating the usefulness of new techniques developed to measure the wave-front tilt from a sodium laser guide star. The analytical expression of in the case of refractive-index fluctuation with a Kolmogorov power spectral density is given together with numerical results for two different profiles. Numerical calculations show that tilt focus anisoplanatism may be a limitation when a sodium laser guide star is used to sense the overall wave-front tilt at visible wavelengths, especially for 8-m-class telescopes.
© 1996 Optical Society of America
Full Article | PDF ArticleMore Like This
Brent L. Ellerbroek and François Rigaut
J. Opt. Soc. Am. A 18(10) 2539-2547 (2001)
Guillaume Molodij and Gérard Rousset
J. Opt. Soc. Am. A 14(8) 1949-1966 (1997)
Carlos Correia, Jean-Pierre Véran, Glen Herriot, Brent Ellerbroek, Lianqi Wang, and Luc Gilles
J. Opt. Soc. Am. A 30(4) 604-615 (2013)