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Proceedings Paper

Uni-axial measurement of three-dimensional surface profile by liquid crystal digital shifter
Author(s): Yukitoshi Otani; Fumio Kobayashi; Yasuhiro Mizutani; Shuugo Watanabe; Manabu Harada; Toru Yoshizawa
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Paper Abstract

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.

Paper Details

Date Published: 2 August 2010
PDF: 6 pages
Proc. SPIE 7790, Interferometry XV: Techniques and Analysis, 77900A (2 August 2010); doi: 10.1117/12.861561
Show Author Affiliations
Yukitoshi Otani, Utsunomiya Univ. (Japan)
Fumio Kobayashi, Utsunomiya Univ. (Japan)
Yasuhiro Mizutani, The Univ. of Tokushima (Japan)
Shuugo Watanabe, Malcom Co., Ltd. (Japan)
Manabu Harada, Malcom Co., Ltd. (Japan)
Toru Yoshizawa, Saitama Medical Univ. (Japan)

Published in SPIE Proceedings Vol. 7790:
Interferometry XV: Techniques and Analysis
Catherine E. Towers; Joanna Schmit; Katherine Creath, Editor(s)

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