Computer simulation study of distance uncertainty in laser triangulation

Ji-Tao Li; Tao Xian; Xianyu Su

doi:10.1117/12.263036

31 December 1996 Computer simulation study of distance uncertainty in laser triangulation

Ji-Tao Li, Tao Xian, Xianyu Su

Proceedings Volume 2866, International Conference on Holography and Optical Information Processing (ICHOIP '96); (1996) https://doi.org/10.1117/12.263036
Event: International Conference on Holography and Optical Information Processing, 1996, Nanjing, China

Abstract

In industrial applications some single point laser range sensing systems by triangulation are often used. There are many algorithms to determine the center position. But there are basic physical limits ofaccuracy ofcenter position which is introduced by laser speckle on image. In this paper we conduct a computer simulation on the intensity distribution and graity of image speckle pattern produced under the completely coherent illumination, and give a direct result on some possible factors such as the observation aperture of an imaging system, the surface roughness, the number of microtopology units included in the point spread function and the width of illumination area. The result confirms the dependence of distance uncertainty on the observation aperture of an imaging system. A comparison between the simulation and earlier theoretical results is also given.

Citation Download Citation

Ji-Tao Li, Tao Xian, and Xianyu Su "Computer simulation study of distance uncertainty in laser triangulation", Proc. SPIE 2866, International Conference on Holography and Optical Information Processing (ICHOIP '96), (31 December 1996); https://doi.org/10.1117/12.263036

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