Full field measurements and identification in Solid Mechanics Depth-resolved Phase Imaging
Full field measurements and identification in Solid Mechanics Depth-resolved Phase Imaging
复制标题
固体力学深度分辨相位成像中的全场测量和识别
DOI：
10.1016/j.piutam.2012.05.010
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
P. D. Ruiz
中科院分区：
文献类型：
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作者：
J. M. Huntley;P. D. Ruiz
传统的全场干涉技术(散斑、莫尔、全息术等)将被测物体的表面变形状态以二维相位图像的形式编码。在过去的10年里，出现了一系列相关的技术(波长扫描干涉、相位对比度光谱光学相干层析成像(OCT)、倾斜扫描干涉测量和高光谱干涉测量)，使人们能够测量弱散射物体内的体积变形状态。这些技术可以被认为是相移干涉测量的相位传感能力和OCT的深度传感能力的结合。本文对这些技术进行了概述，并描述了一种基于Ewald球面结构的理论框架，该框架允许对任何给定的光学几何和波长扫描范围直接计算诸如深度分辨率和位移灵敏度等关键参数。最后，还描述了噪声三维包裹相位体的稳健位相展开的相关问题。
Traditional full-field interferometric techniques (speckle, moiré, holography etc) encode the surface deformation state of the object under test in the form of 2-D phase images. Over the past 10 years, a family of related techniques (Wavelength Scanning Interferometry, Phase Contrast Spectral Optical Coherence Tomography (OCT), Tilt Scanning Interferometry and Hyperspectral Interferometry) has emerged that allows one to measure the volume deformation state within weakly-scattering objects. The techniques can be thought of as combining the phase-sensing capabilities of Phase Shifting Interferometry and the depth-sensing capabilities of OCT. This paper provides an overview of the techniques, and describes a theoretical framework based on the Ewald sphere construction that allows key parameters such as depth resolution and displacement sensitivity to be calculated straightforwardly for any given optical geometry and wavelength scan range. Finally, the related issue of robust phase unwrapping of noisy 3-D wrapped phase volumes is also described.