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Diffraction halo in digital speckle photography

机译：数字斑点摄影中的衍射光环

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摘要

The effects of diffraction halo normalization and spccklegrams nonlinear processing on the diffraction halo shape and digital speckle photography measurements accuracy and sensitivity are considered. By numerical simulation of digital speckle photography in Fourier plane of a plane object tilt it is shown that diffraction halo normalization leads to improvement of the diffraction halo fringes spacing determination and, consequently, speckle photography method accuracy increase. Next, it is shown that spccklegrams nonlinear processing leads to the diffraction halo region broadening and measurements sensitivity increase. These results can be used for improvement of the accuracy and sensitivity of the digital speckle photography method.
机译：考虑了衍射光环归一化和SPCCKLEGRAGS对衍射光环形状和数字斑点摄影测量的影响的影响。通过数字散斑拍摄的数值模拟平面对象倾斜的傅立叶平面，结果表明，衍射光环归一化导致衍射晕圈流出间距测定的改进，因此，散斑拍摄方法精度增加。接下来，示出了SPCCKLEGRAGES非线性处理导致衍射晕区扩展和测量灵敏度增加。这些结果可用于提高数字斑点拍摄方法的准确性和灵敏度。

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