TY  - EJOU
AU  - OTANI, Yukitoshi  
AU  - KOBAYASHI, Fumio  
AU  - MIZUTANI, Yasuhiro  
AU  - Harada, Manabu 
AU  - YOSHIZAWA, Toru  

TI  - Uni-axial 3-D shape measurement by liquid crystal digital shifter
T2  - The International Conference on Computational \& Experimental Engineering and Sciences

PY  - 2011
VL  - 19
IS  - 4
SN  - 1933-2815

AB  - 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.
KW  - 

DO  - 10.3970/icces.2011.019.107