Journal of University of Chinese Academy of Sciences >
Performance Analysis of Low2Order Correction Adaptive Optical System for Non-Kolmogorov Turbulence
Received date: 2004-09-24
Online published: 2005-07-15
Supported by
supported by the National Natural Science Foundation of China(19789301,69908006)and“863”Hi TechProjectofChina
The performance of low order correction adaptive optical systemfor non-Kolmogorov turbulence was studied systematically in this dissertation. The spatial and temporal characterizations of phase fluctuations in nonKolmogorov turbulence were analyzed theoretically. The spatial structure function, the temporal structure function and the temporal power spectrum of phase fluctuations were derived. Some new methods of measuring the atmospheric parameters with ShackHartmann wavefront sensor were proposed. The wavefront residual error of low-order correction adaptive optical system was analyzed by introducing the temporal modal correction coefficient and the modal anisoplanatic coefficient. The anisoplanatic error of low-order correction adaptive optical system with the distributed beacons, to our knowledge, was first investigated. Furthermore, according to the calibrated solar granulation images, the performance of the tip-tilt correction adaptive optical systemfor the solar granulation was studied by post processing method.
RAO Chang-Hui , JIANG Wen-Han , LING Ning . Performance Analysis of Low2Order Correction Adaptive Optical System for Non-Kolmogorov Turbulence[J]. Journal of University of Chinese Academy of Sciences, 2005 , 22(4) : 524 -527 . DOI: 10.7523/j.issn.2095-6134.2005.4.020
[1] Rao CH, Jiang WH, Ling N. Spatial and temporal characterization of phase fluctuations in non2Kolmogorov turbulence. Journal of Modern Optics,2000,47 (6) :1111～1126
[2] Rao CH, Jiang WH, Ling N. Measuring the power2law exponent of an atmospheric turbulence phase power spectrum with a Shack2Hartmann wave2front sensor. Optics Letters,1999,24 (15) :1008～1010
[3] Rao CH, Jiang WH, Ling N. Atmospheric characterization with Shack2Hartmann wave2front sensors for non2Kolmogorov turbulence. OpticalEngineering,2002,41 (2) :534～541
[4] Rao CH, Jiang WH, Ling N. Adaptive2optics compensation by distributed beacons for non2Kolmogorov turbulence. Applied Optics,2001,40 (21) :3441～3449
[5] Rao CH, Jiang WH. Optimum observing wavelength selection for astronomical telescopes with partial correction adaptive optics. Journal of Astronomy and Astrophysics,2002,390 :801～807
[6] Rao CH, Jiang WH, Ling N, et al. An analysis of the observed contrast of solar surface granulation. Chinese Astronomy and Astrophysics,2001,25 :439～445
[7] Rao CH, Jiang WH, Ling N, et al. Tracking algorithms for low2contrast extended objects. Chinese Astronomy and Astrophysics,2002, 26 :115～124
/
| 〈 |
|
〉 |