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Development of Three-Dimensional Dental Scanning Apparatus Using Structured Illumination
Jae Sung Ahn 1 , Anjin Park 1 , Ju Wan Kim, 2 Byeong Ha Lee, 3 Joo Beom Eom 1
1  Medical Photonics Research Center, Korea Photonics Technology Institute (KOPTI), Gwangju 61007, Korea;(J.S.A.);(A.P.)
2  Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea
3  School of Information and Communications, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea

Published: 15 July 2017 by MDPI in Sensors
MDPI, Volume 17; 10.3390/s17071634
Abstract: We demonstrated a three-dimensional (3D) dental scanning apparatus based on structured illumination. A liquid lens was used for tuning focus and a piezomotor stage was used for the shift of structured light. A simple algorithm, which detects intensity modulation, was used to perform optical sectioning with structured illumination. We reconstructed a 3D point cloud, which represents the 3D coordinates of the digitized surface of a dental gypsum cast by piling up sectioned images. We performed 3D registration of an individual 3D point cloud, which includes alignment and merging the 3D point clouds to exhibit a 3D model of the dental cast.
Keywords: 3d Intraoral Scanner, structured illumination, liquid lens, 3D point cloud
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