Abstract

A modification of the method of digital holographic interferometry for the determination of deformations of an object with a diffuse surface by comparing two complex wavefronts reflected from the object at its two different states is considered. The difference of the proposed method with classical digital holography methods is that digital holograms by which the images are reconstructed have complex values determined by the phase shift method (‘‘complex’’ hologram), while classical digital holograms have only real values. Besides, digital holograms are reconstructed with allowance for inhomogeneity of the reference beam, which improves the reconstruction quality. For this purpose, a tunable neutral optical filter is introduced into the reference arm of the optical scheme of the interferometer. The method is verified experimentally.

中文翻译：

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相移数字全息干涉法测定漫射物体的形变场

摘要

考虑了通过比较从物体在其两种不同状态下反射的两个复波前来确定具有散射表面的物体变形的数字全息干涉法方法的一种改进。所提出的方法与经典数字全息方法的区别在于，用于重构图像的数字全息图具有通过相移法确定的复数值（“复数”全息图），而经典数字全息图仅具有实数值。此外，数字全息图被重建以允许参考光束的不均匀性，这提高了重建质量。为此，将可调谐中性滤光片引入干涉仪光学方案的参考臂中。该方法已通过实验验证。