Cao Zhaoliang, Mu Quanquan, Hu Lifa, Lu Xinghai, Xuan Li
State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin, 130033, China.
Opt Express. 2009 Sep 28;17(20):17715-22. doi: 10.1364/OE.17.017715.
A simple method for evaluating the wavefront compensation error of diffractive liquid-crystal wavefront correctors (DLCWFCs) for atmospheric turbulence correction is reported. A simple formula which describes the relationship between pixel number, DLCWFC aperture, quantization level, and atmospheric coherence length was derived based on the calculated atmospheric turbulence wavefronts using Kolmogorov atmospheric turbulence theory. It was found that the pixel number across the DLCWFC aperture is a linear function of the telescope aperture and the quantization level, and it is an exponential function of the atmosphere coherence length. These results are useful for people using DLCWFCs in atmospheric turbulence correction for large-aperture telescopes.
报道了一种评估用于大气湍流校正的衍射液晶波前校正器（DLCWFC）波前补偿误差的简单方法。基于使用科尔莫戈罗夫大气湍流理论计算出的大气湍流波前，推导了一个描述像素数、DLCWFC孔径、量化水平和大气相干长度之间关系的简单公式。研究发现，DLCWFC孔径上的像素数是望远镜孔径和量化水平的线性函数，并且是大气相干长度的指数函数。这些结果对于在大口径望远镜的大气湍流校正中使用DLCWFC的人来说很有用。
