天文望远镜像差对斑点成像技术的影响

着重研究了采用斑点成像技术处理天文望远镜图像时，光学系统固定像差对图像恢复结果的影响。在详细研究各种恢复天文图像振幅和相位的理论和方法的基础上，建立了一个包括Labeyrie振幅恢复方法和KnoxThompson相位重构方法的恢复扩展目标的斑点成像处理模型，分析了光学系统固定像差对系统传递函数相位分布和目标相位重构的影响：天文目标通过大气成像，固定像差将会被淹没在大气湍流随机起伏中，像差对相位重构没有显著影响。处理图像结果表明，斑点成像技术能同时消除大气湍流和望远镜系统固定像差的影响，得到高分辨力的扩展目标图像。还提出了一种消除光学系统像差的方法。

Effects of Large Telescope Aberrations on Speckle Imaging

The effect of the optical system aberrations on the restoration imagery is investigated when the speckle imaging technique is used to process the images of the astronomic telescope.Under the basis of analyzing the method and the theory on the restoration of the modulus and the phase, a speckle imaging model which includes the Labeyrie's speckle interferometry and the Knox-Thompson imaging technique is presented.The effects of telescope aberrations on the involving the modulus and the phase of object Fourier transform due to the random wave front phase distribution of system trarfer function and the restoration of the object phase are discussed.The deterministic optical aberrations are submerged in the random phase of the transfer function introduced by the atmospheric turbulence.The restoration image shows that the speckle imaging technique can remove the effects of the deterministic aberrations and atmospheric turbulence on the estimated images,and the high resolution image is obtained.A method of compensating optical system aberrations is proposed.