Abstract
Basis on the analysis of the plate flatness detection, some problems of the traditional flatness measuring method is pointed out and the 3D reconstruction method of flatness is proposed. The digital flatness measuring instrument is designed, and the measured plane information is entered into the computer, then the data processing is completed by software, which solves the problem of amounts of data, complicated calculation and low accuracy of traditional measurement method. The 3D reconstruction of surface morphology is completed by OpenGL and BCB, to make the information of flatness more sufficient and intuitive. To verify the validity of the measurement, use the flatness function module of dual-frequency laser interferometer to evaluate the instrument accuracy, the results show that it reaches the expected precision index.
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