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首页> 外文会议>Speckle 2010: Optical metrology >A Portable Optical DSPI Strain Sensor with Radial Sensitivity using an Axis-Symmetrical DOE
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A Portable Optical DSPI Strain Sensor with Radial Sensitivity using an Axis-Symmetrical DOE

机译：使用轴对称DOE的具有径向灵敏度的便携式光学DSPI应变传感器

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摘要

This paper presents the optical setup of a radial in-plane digital speckle pattern interferometer (DSPI) which uses an axis-symmetrical diffractive optical element to obtain double illumination. The application of the DOE gives true in-plane sensitivity that is independent on the wavelength of the laser used as illumination source. Furthermore, it only depends on the grating period of the DOE. A new optical layout was introduced in order to obtain a circular measurement area of about 5 mm in diameter. A brief description of the DOE and the portable strain sensor are presented. A detailed explanation of the clamping system is presented showing its ability to deal with rigid body displacements. Finally, some experimental results are shown enlightening that it is able to measure mechanical stress fields from only one difference phase map.
机译：本文介绍了径向平面内数字散斑图案干涉仪（DSPI）的光学设置，该器件使用轴对称衍射光学元件来获得双重照明。 DOE的应用可提供真正的面内灵敏度，而该灵敏度与用作照明源的激光器的波长无关。此外，它仅取决于DOE的光栅周期。为了获得直径约5 mm的圆形测量区域，引入了新的光学布局。介绍了DOE和便携式应变传感器的简要说明。给出了夹紧系统的详细说明，显示了其应对刚体位移的能力。最后，一些实验结果表明，它能够仅从一个相位差图中测量机械应力场。

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