New three-dimensional shape measurements based on the function of modulation

Shuangyun Shao

doi:10.1117/12.674299

9 June 2006 New three-dimensional shape measurements based on the function of modulation

Shuangyun Shao

Proceedings Volume 6149, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 61492W (2006) https://doi.org/10.1117/12.674299
Event: 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2005, Xian, China

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.

Citation Download Citation

Shuangyun Shao "New three-dimensional shape measurements based on the function of modulation", Proc. SPIE 6149, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 61492W (9 June 2006); https://doi.org/10.1117/12.674299

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