Phase-retrieval system using a shifted Gaussian filter
Phase-retrieval system using a shifted Gaussian filter
复制标题
使用移位高斯滤波器的相位检索系统
DOI：
10.1364/josaa.15.000402
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
N. Nakajima
中科院分区：
文献类型：
--
作者：
N. Nakajima
提出了一种具有已知宽度的高斯滤波器的相位恢复系统。利用该系统，可以从已知位移的高斯滤波调制的目标和横向移位的高斯滤波调制的目标的两个傅里叶变换的强度测量中恢复复值目标函数的傅里叶相位。在基于解析函数性质的相位恢复方法中，高斯滤波的移位与指数滤波对目标的调制具有相同的效果。此外，通过改变高斯滤波器的位移量，可以容易地产生与变倾角指数滤波相同的情况。
A phase-retrieval system with a Gaussian filter of known width is proposed. Using this system, one can retrieve the Fourier phase of a complex-valued object function from intensity measurements of two Fourier transforms of the object modulated by the Gaussian filter and the object modulated by the laterally shifted Gaussian filter with known displacement. The shift of the Gaussian filter has the same effect as the modulation of the object with an exponential filter, which is used in the previous phase-retrieval method based on the properties of analytic functions. In addition, the same situation as for the exponential filtering with variable inclination can be easily produced by changing the displacement quantity of the Gaussian filter.