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Direct wave-front sensing using geometric optics

机译:使用几何光学直接波前感测

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摘要

We describe a novel technique for deriving wave-front aberrations from two defocused intensity measurements. The intensity defines a probability density function, and the method is based on the evolution of the cumulative density function of the intensity with light propagation. In one dimension, the problem is easily solved using a histogram specification procedure, with a linear relationship between the wave-front slope and the difference in the abscissas of the histograms. In two dimensions, the method requires the use of a Radon transform. Simulation results demonstrate that very good reconstructions can be attained down to 100 photons in each detector. In addition, the method is insensitive to scintillation at the aperture.
机译:我们描述了一种从两个散焦强度测量中得出波前像差的新技术。强度定义了概率密度函数,并且该方法基于强度累积光密度函数随光传播的演化。在一个维度上,使用直方图指定过程可以轻松解决该问题,并且波前斜率和直方图的横坐标之差之间具有线性关系。在二维上,该方法需要使用Radon变换。仿真结果表明,每个探测器中低至100个光子都可以实现非常好的重建。另外,该方法对孔的闪烁不敏感。

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