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Proceedings Paper

Intensity transfer function of DMD and its application in PMP
Author(s): Yiping Cao; Xianyu Su; Liqun Xiang; Wenjing Chen
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Paper Abstract

Phase measuring profilometry using structured illumination with a digital micro-mirror device(DMD) has been extensively studied because of its advantage of the programmable projection. In this paper we discussed the effect of intensity transfer function of the commercial projector with DMD, analyzed the influence of the intensity transfer function and the nonlinear of detector on the quantity of projected sinusoidal fringe and the accuracy of phase measurement, and proposed the correction method for intensity transfer function of DMD. A DMD based phase measuring profilometry system includes a commercial projector with DMD, a CCD camera and a fringe pattern analysis and processing unit. The experiments show that with the correction of the intensity transfer function of the projector the phase measurement accuracy has been improved obviously.

Paper Details

Date Published: 19 June 2002
PDF: 6 pages
Proc. SPIE 4778, Interferometry XI: Applications, (19 June 2002); doi: 10.1117/12.473557
Show Author Affiliations
Yiping Cao, Sichuan Univ. (China)
Xianyu Su, Sichuan Univ. (China)
Liqun Xiang, Sichuan Univ. (China)
Wenjing Chen, Sichuan Univ. (China)


Published in SPIE Proceedings Vol. 4778:
Interferometry XI: Applications
Wolfgang Osten, Editor(s)

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