Wavefront-coding technique for inexpensive and robust retinal imaging.
Wavefront-coding technique for inexpensive and robust retinal imaging.
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DOI：
10.1364/ol.39.003986
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发表时间：
2014-07
期刊：
影响因子：
3.6
通讯作者：
J. Arines;Rene Hernandez;S. Sinzinger;A. Grewe;E. Acosta
中科院分区：
文献类型：
--
作者：
J. Arines;Rene Hernandez;S. Sinzinger;A. Grewe;E. Acosta
我们提出了一种混合光学数字成像系统，可以提供高分辨率的视网膜图像，而无需波前传感或校正眼睛像差的空间和动态变化。在眼底相机中实施基于波前编码的方法，以获得视网膜细节的高质量图像。波前编码系统仅依赖于光学系统光瞳中立方相位板的使用。相位元件旨在以实现光学像差不变的方式模糊图像。然后通过图像后处理去除模糊。因此，该系统可以提供高分辨率的视网膜图像，避免了感测和校正眼部像差所需的所有光学器件，即波前传感器和可变形镜。
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.