Wang Qinghua, Ri Shien, Tsuda Hiroshi
Appl Opt. 2016 Sep 1;55(25):6858-65. doi: 10.1364/AO.55.006858.
This study proposed to generate digital sampling Moiré fringes by two-pixel down-sampling as a substitute for microscope scanning Moiré fringes, and further reconstruct multiplication Moiré fringes for micron/nano-scale deformation measurement. The displacement and strain sensitivities of the proposed reconstructed multiplication Moiré method are 2 times higher in a wide field of view. Besides, two-dimensional deformation is easily measurable without rotating the sample stage or the scanning lines, no matter whether the scanning resolution is adjustable or not. As an example, the deformations of a carbon fiber reinforced plastic specimen were measured and analyzed. The proposed method effectively expands the application range of the Moiré technique to deformation measurement.
本研究提出通过两像素下采样生成数字采样莫尔条纹，以替代显微镜扫描莫尔条纹，并进一步重建乘法莫尔条纹用于微米/纳米尺度的变形测量。在宽视场中，所提出的重建乘法莫尔方法的位移和应变灵敏度提高了2倍。此外，无论扫描分辨率是否可调，无需旋转样品台或扫描线即可轻松测量二维变形。作为一个例子，对碳纤维增强塑料试样的变形进行了测量和分析。所提出的方法有效地扩展了莫尔技术在变形测量中的应用范围。
