Arines Justo, Hernandez Rene O, Sinzinger Stefan, Grewe A, Acosta Eva
Opt Lett. 2014 Jul 1;39(13):3986-8. doi: 10.1364/OL.39.003986.
We propose a hybrid optical-digital imaging system that can provide high-resolution retinal images without wavefront sensing or correction of the spatial and dynamic variations of eye aberrations. A methodology based on wavefront coding is implemented in a fundus camera in order to obtain a high-quality image of retinal detail. Wavefront-coded systems rely simply on the use of a cubic-phase plate in the pupil of the optical system. The phase element is intended to blur images in such a way that invariance to optical aberrations is achieved. The blur is then removed by image postprocessing. Thus, the system can provide high-resolution retinal images, avoiding all the optics needed to sense and correct ocular aberration, i.e., wavefront sensors and deformable mirrors.
我们提出了一种混合光学-数字成像系统，该系统无需波前传感或校正眼睛像差的空间和动态变化就能提供高分辨率视网膜图像。为了获得高质量的视网膜细节图像，基于波前编码的方法在眼底相机中得以实现。波前编码系统仅依赖于在光学系统的光瞳中使用立方相位板。该相位元件旨在以一种实现对光学像差不变性的方式使图像模糊。然后通过图像后处理去除模糊。因此，该系统能够提供高分辨率视网膜图像，避免了所有用于传感和校正眼像差所需的光学元件，即波前传感器和可变形镜。
