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《Acta Astrophysica Sinica》 1997-01
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The Tilt Determination Problem of Laser Guide Star in Adaptive Optics

FAN Cheng yu SONG Zheng fang( Anhui Institute of Optics and Fine Mechanics, The Chinese Academy of Sciences )  
The expression of the tilt corrected anisoplanatic variance of laser guide star in adaptive optics is derived from Zernike polynomials. By a criterion of tilt anisoplanatic variance 1 rad 2, the expression of tilt isoplanatic angle is derived, which coincide with the derived expression of Parenti and Sasiela. For a turbulence model measured at Kunming and a 0.6 m diameter aperture at a 0.5μm operating wavelength, the tilt anisoplanatic angle is 15.3μrad, and the isoplanatic angle θ 0 is 5μrad. The θ tilt is a factor of 2 larger than θ 0 under these conditions.
【CateGory Index】: P111.4
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