THREE-DIMENSIONAL ORAL CAVITY SCAN DEVICE USING PIEZOELECTRIC ELEMENT BASED PATTERN MODULE AND VARIABLE FOCUS LENS

WIPO Patent Application WO/2016/171412

A1

The present invention relates to a three-dimensional oral cavity scan device for digital impression taking that obtains a three-dimensional image by processing a two-dimensional image acquired by photographing a subject within an oral cavity that has a three-dimensional shape, the device comprising: a pattern mask that converts incident parallel light into structured light; a piezoelectric plate in which a mechanical vibration is generated on the surface thereof by means of an AC voltage applied thereto; and a power supply unit that applies an AC voltage to the piezoelectric plate, wherein the piezoelectric plate moves the pattern mask in the longitudinal direction of the piezoelectric plate using the mechanical vibration generated on the surface thereof. According to the present invention, the oral cavity scan device has an advantage of causing less noise and vibration by moving the pattern mask using the electrical method. In addition, the present invention has an advantage of more accurately measuring the depth of teeth by electrically controlling the focal length of structured light projected on the teeth.

EOM JOO BEOM (KR)
AHN JAESUNG (KR)
LEE BYEONG IL (KR)
SHIN IN HEE (KR)
PARK ANJIN (KR)
LEE BYEONG HA (KR)

PCT/KR2016/003511

October 27, 2016

April 05, 2016

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KOREA PHOTONICS TECH INST (KR)

A61C19/04; A61B6/14

KR20130019296A	2013-02-26
KR20100087629A	2010-08-05
US20050243330A1	2005-11-03
JP2010148860A	2010-07-08
KR20100130559A	2010-12-13

LEE, UN CHEOL (KR)
이은철 (KR)

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