Alleviating image artifacts in wavefront coding extended depth of field imaging system
Alleviating image artifacts in wavefront coding extended depth of field imaging system
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DOI：
10.1016/j.optcom.2018.12.006
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发表时间：
2019-04
影响因子：
2.4
通讯作者：
Xutao Mo;Zhang Tao;Bin Wang;Xianshan Huang;C. Kuang;Xu Liu
中科院分区：
文献类型：
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作者：
Xutao Mo;Zhang Tao;Bin Wang;Xianshan Huang;C. Kuang;Xu Liu
基于波前编码的扩展景深光学成像系统可以应用于许多领域，这些领域需要在快照中获得更多沿光轴方向的目标信息。当使用非旋转对称相位掩模（如三次相位掩模）时，通常采用经典的维纳恢复方法恢复最终图像。然而，在最终修复的图像中存在图像伪影是一个亟待解决的问题。针对相位掩模沿光轴旋转180度前后图像传感器捕获的两幅共轭图像，提出了一种处理图像伪影的方法。不同于以往的方法通常需要测量成像系统的点扩散函数或光学传递函数，我们不再需要测量它们。ZEMAX仿真和实验验证了该方法的有效性。
Optical imaging systems with extended depth of field based on wavefront coding can be used in many fields, which require more object information along the optical axis in a snapshot. When using the non-rotational symmetric phase masks such as cubic phase mask, the final images are usually restored by classical wiener restoration method. However, the existence of image artifacts in final restored images is a problem to be solved. We proposed a method to alleviate the image artifacts by processing two conjugate images, which are captured by image sensor before and after rotating the phase mask 180 degrees along the optical axis. Unlike the previous methods usually need to measure the point spread function or optical transfer function of the imaging system, we do not need to measure them anymore. Both the ZEMAX simulation and experiment verified our method.