7 March 2016 A portable intra-oral scanner based on sinusoidal pattern of fast phase-shifting
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Proceedings Volume 9770, Advances in Display Technologies VI; 97700G (2016) https://doi.org/10.1117/12.2218483
Event: SPIE OPTO, 2016, San Francisco, California, United States
Abstract
This paper presented our current research about the intra-oral scanner made by MIRDC. Utilizing the sinusoidal pattern for fast phase-shifting technique to deal with 3D digitalization of human dental surface profile, the development of pseudo-phase shifting digital projection can easily achieve one type of full-field scanning instead of the common technique of the laser line scanning. Based on traditional Moiré method, we adopt projecting fringes and retrieve phase reconstruction to forward phase unwrapping. The phase difference between the plane and object can be exactly calculated from the desired fringe images, and the surface profile of object was probably reconstructed by using the phase differences information directly. According to our algorithm of space mapping between projections and capturing orientation exchange of our intra-oral scanning configuration, the system we made certainly can be proved to achieve the required accuracy of ±10μm to deal with intra-oral scanning on the basis of utilizing active triangulation method. The final purpose aimed to the scanning of object surface profile with its size about 10x10x10mm3.
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Chia-Ming Jan, Chia-Ming Jan, Ying-Chieh Lin, Ying-Chieh Lin, "A portable intra-oral scanner based on sinusoidal pattern of fast phase-shifting", Proc. SPIE 9770, Advances in Display Technologies VI, 97700G (7 March 2016); doi: 10.1117/12.2218483; https://doi.org/10.1117/12.2218483
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