# US 12,758,102 B2 · 3D-image oral scanner with stereo optical system configured using single camera

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- Number: US 12,758,102 B2
- Document ID: US12758102B2
- Status: Granted
- Kind: B2
- Application number: 19/101,367
- Filed: 2023-02-09
- Published: 2026-04-23
- Granted: 2026-10-13
- Earliest claimed: 2022-08-23
- Assignees: Teamnubiz Co., Ltd.
- Applicants: Teamnubiz Co., Ltd.
- Inventors: Eun Goo Kim
- Web page: https://patentgrep.com/patent/US12758102B2

## CPC

- A61B 5/0088: {for oral or dental tissue}
- A61B 5/0062: {Arrangements for scanning}
- A61B 5/4547: {Evaluating teeth}
- G02B 26/0816: {by means of one or more reflecting elements}
- G02B 26/0883: {the refracting element being a prism}
- G02B 30/60: involving reflecting prisms and mirrors only
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A 3D-image oral scanner with a stereo optical system configured using a single camera according to the present disclosure includes a stereo image optical unit 3-dimensionally photographing measurement objects in an oral cavity through one camera, wherein the stereo image optical unit includes: a first light path changer changing paths of a first light image and a second light image traveling inside at different angles after reflecting from a measurement object in an oral cavity to an image light path; and one camera sensor taking the first light image and the second light image together that have traveled inside at different angles and of which the paths have been changed by the light path changer.

## Claims

### Claim 1

A 3D-image oral scanner with a stereo optical system configured using a single camera, the 3D-image oral scanner comprising a stereo image optical unit 3-dimensionally photographing measurement objects in an oral cavity through one camera,
wherein the stereo image optical unit includes:
a first light path changer changing paths of a first light image and a second light image traveling inside at different angles after reflecting from a measurement object in an oral cavity to an image light path; and
one camera sensor taking the first light image and the second light image together that have traveled inside at different angles and of which the paths have been changed by the first light path changer,
wherein the first light path changer includes:
a first reflective mirror and a second reflective mirror spaced apart from each other to reflect beams of light traveling inside at different angles after reflecting from a measurement object in an oral cavity to a double-sided prism positioned on an image light path; and
a double-sided prism reflecting a first light image and a second light image reflecting from the first reflective mirror and the second reflective mirror, respectively, while changing paths of the first and second light images to the image light path on a first surface and a second surface thereof, and
the one camera sensor takes the first light image and the second light image together which have traveled inside at different angles and of which the paths have been changed on the first surface and the second surface of the double-sided prism.

### Claim 2 (depends on 1)

The 3D-image oral scanner of claim 1, wherein the first reflective mirror, the second reflective mirror, and the double-sided prism are integrally manufactured and assembled.

### Claim 3 (depends on 1)

The 3D-image oral scanner of claim 1, comprising an engine having a center axis different from the image light path and making and projecting a structured light pattern,
wherein the engine includes:
a light unit using a 3-wavelength light source a blue LED; and
a second image-forming lens group forming an image using light coming out from the light unit.

### Claim 4 (depends on 3)

The 3D-image oral scanner of claim 3, comprising a second light path changer changing a path of light coming out through the second image-forming lens group to a path the same as the image light path.

### Claim 5 (depends on 4)

The 3D-image oral scanner of claim 4, wherein the second light path changer includes a third reflective mirror and a fourth reflective mirror.

### Claim 6 (depends on 5)

The 3D-image oral scanner of claim 5, wherein the third reflective mirror and the fourth reflective mirror are manufactured and assembly into an integral reflective mirror.

### Claim 7 (depends on 1)

The 3D-image oral scanner of claim 1, comprising a first image-forming lens group between the first light path changer and the one camera sensor, and
wherein the first light image and the second light image that have traveled inside and of which the paths have been changed by the first light path changer are taken and sent to the one camera sensor through the first image-forming lens group.