Method of 3D curved surface profile measuring and figure processing

Xiping Xu; Guoyu Zhang; Hongmei Xu; Zhiyong An; Hongguang Sun

doi:10.1117/12.471696

20 September 2002 Method of 3-D Curved Surface Profile Measuring and Figure Processing

Xiping Xu, Guoyu Zhang, Hongmei Xu, Zhiyong An, Hongguang Sun

Proceedings Volume 4927, Optical Design and Testing; (2002) https://doi.org/10.1117/12.471696
Event: Photonics Asia, 2002, Shanghai, China

Abstract

Based on the principle of laser triangulation and the technology of modern photoelectric sensor, a laser scanning optical triangulation measuring system which is used to measure 3-D curved surface profile is presented, the system uses a semiconductor laser probe and combines with 2-D grating displacement measuring systems and servo-control systems to realize scanning many points for the measured curved surface. Through the Fourier transform profile detection algorithm with the frequency field low-pass filter performing, computer finishes the real time data processing, the profile of 3-D curved surface is given with high accuracy and high speed. In this paper, the mathematical model of the measuring system is introduced and the jump-error processing method of the objects with large gradient change is discussed in detail. The measuring result shows that the 3-D figure is simple in use, convenient in parameter adjustment, especially, is suitable to measure the objects surface with large gradient and low reflecting ratio.

Citation Download Citation

Xiping Xu, Guoyu Zhang, Hongmei Xu, Zhiyong An, and Hongguang Sun "Method of 3-D Curved Surface Profile Measuring and Figure Processing", Proc. SPIE 4927, Optical Design and Testing, (20 September 2002); https://doi.org/10.1117/12.471696

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KEYWORDS

Linear filtering

Computing systems

Optical scanning systems

Semiconductor lasers

Laser beam diagnostics

Imaging systems

Control systems

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