Single-camera microscopic stereo digital image correlation using a diffraction grating
Single-camera microscopic stereo digital image correlation using a diffraction grating
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使用衍射光栅的单相机显微立体数字图像相关
DOI：
10.1364/oe.21.025056
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发表时间：
2013-10-21
期刊：
影响因子：
3.8
通讯作者：
Wang, Qiong
中科院分区：
文献类型：
--
作者：
Pan, Bing;Wang, Qiong
提出了一种简单、经济、实用的基于单摄像机和透射衍射光栅的显微3D-DIC方法，用于小尺度物体的表面形貌和变形测量。通过用准单色光源照射测试样品，放置在相机前面的透射衍射光栅可以产生样品表面的两个横向间隔开的一级衍射视图到相机目标的两个半部中。包括负和正一阶衍射视图的单个图像可以用于重建测试样品的轮廓，而在变形之前和之后获取的两个单个图像可以用于确定样品表面的3D位移和应变。详细介绍了该技术的基本原理和实现过程。通过对圆柱表面轮廓和三维位移的测量，验证了所提出的微观三维离散干涉测量方法的有效性和准确性。(C)2013年美国光学学会
A simple, cost-effective but practical microscopic 3D-DIC method using a single camera and a transmission diffraction grating is proposed for surface profile and deformation measurement of small-scale objects. By illuminating a test sample with quasi-monochromatic source, the transmission diffraction grating placed in front of the camera can produce two laterally spaced first-order diffraction views of the sample surface into the two halves of the camera target. The single image comprising negative and positive first-order diffraction views can be used to reconstruct the profile of the test sample, while the two single images acquired before and after deformation can be employed to determine the 3D displacements and strains of the sample surface. The basic principles and implementation procedures of the proposed technique for microscopic 3D profile and deformation measurement are described in detail. The effectiveness and accuracy of the presented microscopic 3D-DIC method is verified by measuring the profile and 3D displacements of a regular cylinder surface. (C) 2013 Optical Society of America