Instrumentation, Measurement, and Metrology

Least-squares calibration method for fringe projection profilometry

[+] Author Affiliations
Hongwei Guo, Haitao He, Yingjie Yu, Mingyi Chen

Shanghai University, Laboratory of Applied Optics and Metrology, Shanghai, 200072, China E-mail: hw-guo@yeah.net

Opt. Eng. 44(3), 033603 (Mar. 4, 2005). doi:10.1117/1.1871832
History: Received May 25, 2004; Revised Aug. 19, 2004; Accepted Sep. 22, 2004; Mar. 4, 2005; Online March 04, 2005
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This paper presents a novel calibration approach for determining the mapping relationship between the depth map and the phase difference in fringe projection profilometry. This approach is based on a simple nonlinear function, which is deduced by analyzing the geometry of measurement system and hence perfectly describes the mapping between the depth map and the phase-difference distribution. The calibration is implemented by translating a target plane to a sequence of given positions with known depths, and measuring its phase distributions. A least-squares estimation algorithm with linear computation is deduced to retrieve the related parameters and to reconstruct the mapping function. Both computer simulation and experiment are carried out to demonstrate the validity of this technique. © 2005 Society of Photo-Optical Instrumentation Engineers.

© 2005 Society of Photo-Optical Instrumentation Engineers

Citation

Hongwei Guo ; Haitao He ; Yingjie Yu and Mingyi Chen
"Least-squares calibration method for fringe projection profilometry", Opt. Eng. 44(3), 033603 (Mar. 4, 2005). ; http://dx.doi.org/10.1117/1.1871832


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