US-20260123830-A1 - INTRAORAL SCANNER

Abstract

An intraoral scanner according to an embodiment includes a case having an opening part formed at one end thereof, a light source part disposed inside the case and configured to emit light, a first optical system disposed at the opening part and configured to reflect the light emitted from the light source part toward a subject located outside the case, a second optical system disposed adjacent to the first optical system and configured to reflect light reflected from the subject toward the inside of the case, and an image sensor part configured to detect the light reflected by the second optical system.

Inventors

• Seung Hyun Jeon
• KYONG KOOK KIM

Assignees

• ARCREAL INC.

Dates

Publication Date

20260507

Application Date

20221031

Priority Date

20211029

Claims (10)

1. 1 . An intraoral scanner comprising: a case having an opening part formed at one end thereof; a light source part disposed inside the case and configured to emit light; a first optical system disposed at the opening part and configured to reflect the light emitted from the light source part toward a subject located outside the case; a second optical system disposed adjacent to the first optical system and configured to reflect light reflected from the subject toward the inside of the case; and an image sensor part configured to detect the light reflected by the second optical system.
2. 2 . The intraoral scanner of claim 1 , wherein: the first optical system is configured to reflect the light reflected from the subject toward the image sensor part; and the image sensor part is configured to further detect the light reflected by the first optical system.
3. 3 . The intraoral scanner of claim 2 , wherein positions and directions of the first optical system and the second optical system are set so that a plurality of images of the subject each reflected by the first optical system and the second optical system and detected by the image sensor part do not overlap each other, and each of the images is entirely visible.
4. 4 . The intraoral scanner of claim 1 , wherein a dihedral angle between a reflective surface of the first optical system and a reflective surface of the second optical system is configured to form a minor angle.
5. 5 . The intraoral scanner of claim 1 , wherein the second optical system includes a first reflective surface and a second reflective surface configured to reflect the light reflected from the subject toward the inside of the case.
6. 6 . The intraoral scanner of claim 5 , wherein the first reflective surface of the second optical system is adjacent to the reflective surface of the first optical system, and a dihedral angle between the first reflective surface and the reflective surface of the first optical system is configured to form a minor angle.
7. 7 . The intraoral scanner of claim 5 , wherein the second reflective surface of the second optical system is adjacent to the first reflective surface, and a dihedral angle between the first reflective surface and the second reflective surface is configured to form a minor angle.
8. 8 . The intraoral scanner of claim 1 , wherein the light source part is configured to emit patterned light or structured light.
9. 9 . The intraoral scanner of claim 2 , wherein the image sensor part is configured to obtain a plurality of stereo images from images of the light reflected from the first optical system and the second optical system.
10. 10 . The intraoral scanner of claim 1 , wherein virtual central lines of the light source part, the first optical system, the second optical system, and the image sensor part that are projected on a plane of the case are arranged to be aligned on a virtual central line projected on the plane of the case.

Description

CROSS REFERENCE TO RELATED APPLICATIONS AND CLAIM OF PRIORITY This application claims benefit under 35 U.S.C. 119, 120, 121, or 365(c), and is a National Stage entry from International Application No. PCT/KR2022/016824 filed on Oct. 31, 2022, which claims priority to the benefit of Korean Patent Application Nos. 10-2021-0146626 filed on Oct. 29, 2021 and 10-2022-0141641 filed on Oct. 28, 2022 in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. BACKGROUND 1. Technical Field The present disclosure relates to an intraoral scanner, and more particularly, to an intraoral scanner configured to obtain a 3D image of an oral cavity. 2. Background Art Generally, an impression-taking procedure is performed in a process of diagnosis or treatment of a dental patient. Impression taking is a necessary clinical procedure in establishing a diagnosis and treatment plan for a patient by reflecting conditions of teeth and tissue in an oral cavity in an impression material. In recent years, with application of digital technology to dental clinic and lab processes, the number of cases of using a digital impression in which an oral cavity or an impression body is scanned and converted into digital data without using an impression material in impression taking has increased. In this way, with an increase in the importance of a digital impression in dental diagnosis and treatment, development of technology related to intraoral scanners has been actively carried out. An intraoral scanner is a device or system inserted into an oral cavity of a dental patient to scan a 3D structure of teeth in a non-contact manner. Generally, recently developed intraoral scanners capture 2D image data of an oral cavity and perform 3D modeling of an oral cavity structure based on the 2D image data. The range of application of intraoral scanners having such functions has expanded among clinical applications, and the intraoral scanners may also be used in fabricating an implant, an orthodontic appliance, and the like in addition to being used in treatment for tooth restoration. Meanwhile, impression accuracy is important for successful dental treatment. A digital impression using an intraoral scanner does not have a problem of deformation due to contraction, expansion, or the like of an impression material and thus has higher impression accuracy compared to a traditional impression-taking method. However, for an intraoral scanner to be continuously used as a tool for sophisticated dental treatment, there is a need to enhance scanning accuracy. Also, since an intraoral scanner is used by being inserted into an oral cavity of a dental patient in a non-contact manner, it is preferable for the intraoral scanner to have a structure that makes a patient feel comfortable during use of the intraoral scanner. SUMMARY Embodiments disclosed in the present specification provide an intraoral scanner having a plurality of optical systems disposed therein to have a structure suitable to be used by being inserted into an oral cavity of a dental patient in a non-contact manner. One embodiment of the present disclosure provides an intraoral scanner including: a case having an opening part formed at one end thereof; a light source part disposed inside the case and configured to emit light; a first optical system disposed at the opening part and configured to reflect the light emitted from the light source part toward a subject located outside the case; a second optical system disposed adjacent to the first optical system and configured to reflect light reflected from the subject toward the inside of the case; and an image sensor part configured to detect the light reflected by the second optical system. According to one embodiment, the first optical system may be configured to reflect the light reflected from the subject toward the image sensor part, and the image sensor part may be configured to further detect the light reflected by the first optical system. According to one embodiment, positions and directions of the first optical system and the second optical system may be set so that a plurality of images of the subject each reflected by the first optical system and the second optical system and detected by the image sensor part do not overlap each other, and each of the images is entirely visible. According to one embodiment, a dihedral angle between a reflective surface of the first optical system and a reflective surface of the second optical system may be configured to form a minor angle. According to one embodiment, the second optical system may include a first reflective surface and a second reflective surface configured to reflect the light reflected from the subject toward the inside of the case. According to one embodiment, the first reflective surface of the second optical system may be adjacent to the reflective surface of the first optical system, and a dihedral angle between the first reflective su