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基于有较大的焦深的普通光学显微镜及3D成像软件,利用自制的可绕固定轴的升降平台及光纤辐照形态,根据视差原理构建了一个测量小型样品的三维表面参数的测试系统。以外形较复杂的医用牙科钻头为样品,研究了显微镜的放大倍数、用于构建三维图像的两幅相似图像的夹角与样品表面参数测量值之间的关系。通过与样品的标称值对比,实验中所用的毫米量级的样品,在合适的物镜组放大倍数及合适的夹角下,相对误差在5%范围内,表明所建立的测量系统可用于尺寸较小的样品表面参数的测量。
Based on the ordinary optical microscope and 3D imaging software with larger depth of focus, a three-dimensional surface parameter measurement system was built based on the principle of parallax to make use of the self-made lifting platform and optical fiber irradiation around the fixed axis. Taking the more complex medical dental drill as a sample, the magnification of the microscope and the relationship between the angle between two similar images used to construct the three-dimensional image and the measurement of the sample surface parameters were studied. By contrasting with the nominal values of the samples, the millimeter-scale samples used in the experiments show a relative error of 5% at the appropriate magnification of the objective lens set and at a suitable angle, indicating that the established measurement system can be used for size Measurement of smaller sample surface parameters.