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Proceedings Paper

Comparing digital-light-processing (DLP) and liquid-crystal-display(LCD) projection technologies for high-quality 3D shape measurement
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Paper Abstract

This paper presents a thorough comparison between the digital-light-processing (DLP) technology and liquid-crystaldisplay (LCD) projection technology on high-quality 3D shape measurement. Specifically, each individual color channel and the combination of three channels together are studied with the focused sinusoidal pattern (FSP) method and defocused binary pattern (DBP) method. Experimental data indicated that for slow speed measurements, because of its higher contrast, DLP has the advantage for the DBP, or when the precision synchronization is presented for FSP method. Since LCD does not have rigorous timing requirements, it provides more flexibility for system development for FSP method.

Paper Details

Date Published: 13 November 2014
PDF: 8 pages
Proc. SPIE 9276, Optical Metrology and Inspection for Industrial Applications III, 92760Q (13 November 2014); doi: 10.1117/12.2071536
Show Author Affiliations
Chen Gong, Iowa State Univ. (United States)
Beiwen Li, Iowa State Univ. (United States)
Song Zhang, Iowa State Univ. (United States)

Published in SPIE Proceedings Vol. 9276:
Optical Metrology and Inspection for Industrial Applications III
Sen Han; Toru Yoshizawa; Song Zhang, Editor(s)

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