Title:
DEVICE FOR MEASURING THREE-DIMENSIONAL SHAPE OF INSIDE OF ORAL CAVITY
Document Type and Number:
WIPO Patent Application WO/2016/047739
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a device for measuring the three-dimensional shape of the inside of an oral cavity that is capable of accurately measuring the shape of the inside of an oral cavity using a simple structure. The device is provided with: a cylindrical main body 11 provided with a light entry part 11a that light passes into and out of; a light source 12 that is provided in the main body and emits illumination light; an image sensor 17 having arranged therein a plurality of photoelectric conversion elements for receiving light having entered from the light entry part and converting the same into electrical signals; an image forming optical means 14 that is disposed between the light entry part and image sensor, includes a telecentric optical system or near-telecentric optical system that forms an image for the image sensor, and forms an image of an object having a distance from the light entry part of -1 mm to 50 mm; a microlens array 16 that is disposed between the image forming optical means and the image sensor and has a plurality of minute unit lenses 16a arranged therein; and an image processing means 18 that calculates depth information on the basis of information included in the electrical signals from the image sensors about the parallax that is obtained from the plurality of unit lenses.
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Inventors:
KIKUCHI HIROAKI (JP)
Application Number:
PCT/JP2015/077058
Publication Date:
March 31, 2016
Filing Date:
September 25, 2015
Export Citation:
Assignee:
G C DENTAL IND CORP (JP)
International Classes:
G01B11/24; A61C19/04
Foreign References:
| JP2008281399A | 2008-11-20 | |||
| JP2012157692A | 2012-08-23 | |||
| JP2009288042A | 2009-12-10 | |||
| JP2007147457A | 2007-06-14 | |||
| JP2002230523A | 2002-08-16 |
Attorney, Agent or Firm:
YAMAMOTO, Noriaki et al. (JP)
Yamamoto 典輝 (JP)
Yamamoto 典輝 (JP)
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