13 November 2014 Comparing digital-light-processing (DLP) and liquid-crystal-display(LCD) projection technologies for high-quality 3D shape measurement
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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, Chen Gong, Beiwen Li, Beiwen Li, Song Zhang, 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); doi: 10.1117/12.2071536; https://doi.org/10.1117/12.2071536
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