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Information-theoretic analyses of a birefringent blur filter

机译：双折射模糊滤镜的信息理论分析

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摘要

We present the results of an information-theoretic analysis of an undersampled imaging system that contains a birefringent blur filter. We vary the spacing between replicas of the nonblurred point-spread function produced by the birefringent blur filter to find the value that yields the maximum information density. Comparison is made between this value and that yielded by a conventional qualitative design. We then analyze the effects of defocus aberration on the design of the birefringent blur filter. A wide search of blur-defocus space yields local peaks in the information density surface. The information density at these peaks is shown to exceed the maximum information density associated with the optimized birefringent blur filter or defocus alone, particularly when the fill factor of the photodetector array is low.
机译：我们介绍了包含双折射模糊滤镜的欠采样成像系统的信息理论分析结果。我们改变了由双折射模糊滤波器产生的非模糊点扩展函数的副本之间的间隔，以找到产生最大信息密度的值。将该值与常规定性设计得出的值进行比较。然后，我们分析了散焦像差对双折射模糊滤镜设计的影响。对模糊散焦空间的广泛搜索会在信息密度表面产生局部峰值。这些峰值处的信息密度显示超过单独使用优化的双折射模糊滤镜或散焦的最大信息密度，尤其是在光电探测器阵列的填充因子较低时。

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