用斑点成像消除光学系统像差的影响

Elimination of optical aberrations by use of speckle imaging

在详细分析用斑点成像消除目标图像中随机扰动影响的基础上,提出了在有像差光学系统中,应用斑点成像消除图像中像差影响的方法。通过在光学系统的光路中引入随机相位屏,采集物的短曝光像,用斑点成像处理,恢复目标图像的功率谱和相位谱,可以得到目标近衍射极限的图像。实验结果表明,这种方法可以消除图像中光学系统像差的影响。

The principle of speckle imaging to restore the blurred image caused by turbulence is explored. An approach for removing the aberrations of the optical system by using speckle imaging is proposed. A random phase screen with phase spectrum fluctuation corresponding to Kolmogorv distribution is placed in the light path of the optical system to acquire large number of short-exposure images, and the image power spectrum and phase spectrum is restored by processing the short-exposure images. The results suggest that the present method is suitable for removing the aberrations and improving the imaging quality of the optical system.