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ABSTRACT

Uni-axial 3-D shape measurement by liquid crystal digital shifter

Yukitoshi OTANI, Fumio KOBAYASHI, Yasuhiro MIZUTANI, Manabu Harada, Toru YOSHIZAWA

The International Conference on Computational & Experimental Engineering and Sciences 2011, 19(4), 107-108. https://doi.org/10.3970/icces.2011.019.107

Abstract

A uni-axial three dimensional surface measurement by a liquid crystal digital shifter( LCDC) is proposed using a telecentric optical system. Distance information can be determined by measuring the contrast in the projected grating pattern. The magnification of the object image captured by a CCD camera is adjusted constant by changing the focus distance. A shadow less measurement of the object's area is archived by using a uni-axial system. The liquid crystal digital shifter is a powerful tool to make arbitrary intensity and frequency distribution. Surface profiles of some mechanical parts were measured to demonstrate this method.

Cite This Article

OTANI, Y., KOBAYASHI, F., MIZUTANI, Y., Harada, M., YOSHIZAWA, T. (2011). Uni-axial 3-D shape measurement by liquid crystal digital shifter. The International Conference on Computational & Experimental Engineering and Sciences, 19(4), 107–108.



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