Liu Changgeng, Yu Xiao, Kim Myung K
Digital Holography and Microscopy Laboratory, Department of Physics University of South Florida, Tampa, Florida 33620, USA.
Appl Opt. 2013 Apr 20;52(12):2940-9. doi: 10.1364/AO.52.002940.
We present a phase aberration correction method based on the correlation between the complex full-field and guide-star holograms in the context of digital holographic adaptive optics (DHAO). Removal of a global quadratic phase term before the correlation operation plays an important role in the correction. Correlation operation can remove the phase aberration at the entrance pupil plane and automatically refocus the corrected optical field. Except for the assumption that most aberrations lie at or close to the entrance pupil, the presented method does not impose any other constraints on the optical systems. Thus, it greatly enhances the flexibility of the optical design for DHAO systems in vision science and microscopy. Theoretical studies show that the previously proposed Fourier transform DHAO (FTDHAO) is just a special case of this general correction method, where the global quadratic phase term and a defocus term disappear. Hence, this correction method realizes the generalization of FTDHAO into arbitrary DHAO systems. The effectiveness and robustness of this method are demonstrated by simulations and experiments.
我们提出了一种基于数字全息自适应光学（DHAO）中复全场全息图与导星全息图之间相关性的相位像差校正方法。在相关运算之前去除全局二次相位项在校正中起着重要作用。相关运算可以去除入瞳平面处的相位像差，并自动重新聚焦校正后的光场。除了大多数像差位于或接近入瞳这一假设外，所提出的方法对光学系统不施加任何其他约束。因此，它极大地提高了视觉科学和显微镜学中DHAO系统光学设计的灵活性。理论研究表明，先前提出的傅里叶变换DHAO（FTDHAO）只是这种通用校正方法的一个特例，其中全局二次相位项和离焦项消失。因此，这种校正方法实现了FTDHAO到任意DHAO系统的推广。通过模拟和实验证明了该方法的有效性和鲁棒性。
