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Proceedings Paper

New three-dimensional shape measurements based on the function of modulation
Author(s): Shuangyun Shao
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Paper Abstract

For the fast and shade-free shape measurement of 3-D objects with large discontinuous height step, a new 3-D shape measurements based on the function of modulation is proposed. To avoid the shadings we adopt a coaxial optical system for projection and observation. A sinusoidal grating pattern is projected onto the surface of a testing object. Instead of phase information, we use the fringe modulation of the detected fringe pattern to determine the height distribution. Different modulation values correspond to different distances from the point of the object to the projecting system. Established the look-up table of modulation and position, only one frame of projected sinusoidal fringe is obtained and the height distribution of object can be calculated according to the value of modulation for the specified pixel of interest. The measurement result shows that the proposed 3-D shape measurement technique will be a promising method for fast acquiring 3-D data of complex objects.

Paper Details

Date Published: 9 June 2006
PDF: 5 pages
Proc. SPIE 6149, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 61492W (9 June 2006); doi: 10.1117/12.674299
Show Author Affiliations
Shuangyun Shao, Beijing Jiaotong Univ. (China)


Published in SPIE Proceedings Vol. 6149:
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Li Yang; Shangming Wen; Yaolong Chen; Ernst-Bernhard Kley, Editor(s)

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