Development of image-space telecentric lens for intra-oral 3D scanner

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Abstract

An image-space telecentric lens for an intra-oral 3D scanner was designed and fabricated for dental application. Since a telecentric function can provide the same results regardless of image plane position, it helps to realize a more accurate image for an intra-oral scanner. The performance of the designed lens meets the required properties for HD resolution. In particular, lateral color is corrected within 1 pixel. This system achieves depth of focus of more than 3 mm. For user convenience, the developed system consists of a prism part and an imaging part. Both parts are optimized to reduce the front size and weight of the system. In order to make the parallax sights, parallax angle was determined to be 8 degrees between two optical systems.

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Kim, T. Y., Shin, M. H., Chang, R., & Kim, Y. J. (2015). Development of image-space telecentric lens for intra-oral 3D scanner. Journal of the Optical Society of Korea, 19(3), 303–310. https://doi.org/10.3807/JOSK.2015.19.3.303

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