| 1. | The dissertation also concludes many turbulence spectrums , and compares the differences between them . a few methods of producing phase screen have been listed , we choose the fft phase screen to simulation 对比了目前产生相位屏的多种方法,如功率谱( psd )法、协方差( covariance )法、 fft谱反演法和zernike多项式法等。 |