Uni-axial measurement of three-dimensional surface profile by liquid crystal digital shifter
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説明
A uni-axial measurement of three dimensional surface profiles by a liquid crystal digital shifter is proposed using a telecentric optical system. Height information is captured by measuring the contrast in the projected pattern. A shadow less measurement of the object's area is archived by using a uni-axial system. The magnification of the object image captured by a CCD camera is made constant by changing the focus distance. The liquid crystal digital shifter is a powerful tool to make arbitrary intensity and frequency distribution. Surface profiles of mechanical parts were measured to demonstrate this method.
収録刊行物
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- SPIE Proceedings
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SPIE Proceedings 7790 77900A-, 2010-08-01
SPIE