Speckle displacement for general object deformaton of a curved surface
Speckle displacement for general object deformaton of a curved surface
复制标题
曲面一般物体变形的散斑位移
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
I. Yamaguchi
中科院分区：
文献类型：
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作者：
I. Yamaguchi
Displacement of speckles arising from a curved surface subject to displacement or deformation is investigated by numerical simulations using a rough surface model that is represented by an assembly of point scatterers distributed around its mean surface. Speckle displacement in the diffraction field of an object illuminated by a narrow laser beam is derived from the peak position of the cross-correlation function between the 2-dimensional intensity signals recorded by a CCD before and after object deformation or displacement. The evaluated speckle displacement is compared with with those obtained from analytical approach for a flat mean surface. It has been shown that they agree well with each other. Then speckle displacement from a spherical surface is evaluated to indicate some differences in displacement sensitivities from a plane. This simulation can be applied to surface shape and roughness, and recording specifications.
