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Non-linear solution for 2D phase shifting
Non-linear solution for 2D phase shifting
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机译:二维相移的非线性解决方案
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摘要
Disclosed is a method of reconstructing a representative detailed phase image from a set of fringe pattern interferogram images of an object. The images are captured by an x-ray interferometer having a crossed diffraction grating. A set of captured fringe pattern interferogram images from the x-ray interferometer are provided, the set comprising no more than eight captured fringe pattern interferogram images. The method determines an estimate of an absorption parameter (a), two-dimensional amplitude modulation parameters (mx, my), and two-dimensional phase modulation parameters (ξx and ξy) from a closed-form solution using the received set of captured fringe pattern interferogram images, and reconstructs the representative detailed phase image using the parameter estimates.
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