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

Chen Gong; Beiwen Li; Song Zhang

doi:10.1117/12.2071536

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13 November 2014 Comparing digital-light-processing (DLP) and liquid-crystal-display(LCD) projection technologies for high-quality 3D shape measurement

Chen Gong, Beiwen Li, Song Zhang

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Proceedings Volume 9276, Optical Metrology and Inspection for Industrial Applications III; 92760Q (2014) https://doi.org/10.1117/12.2071536
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

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.

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Chen Gong, Beiwen Li, and Song Zhang "Comparing digital-light-processing (DLP) and liquid-crystal-display(LCD) projection technologies for high-quality 3D shape measurement", Proc. SPIE 9276, Optical Metrology and Inspection for Industrial Applications III, 92760Q (13 November 2014); https://doi.org/10.1117/12.2071536

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