Window system for an intraoral scanner

Patent metadata

Field	Value
Publication number	US-2020163533-A1
Application number	US-201816621287-A
Country	US
Kind code	A1
Filing date	Jun 14, 2018
Priority date	Jun 14, 2017
Publication date	May 28, 2020
Grant date	—

Abstract

The invention relates to a window system for an intraoral scanner. Said window system comprises an optical element having a thermal conductivity of more than 1 W m−1 K−1. A window, which comprises a pane made for example of a plastic, glass, or corundum, is detachably disposed on the optical element at an average distance of less than 1 mm. At least one heat source is also connected to the optical element. The invention further relates to an intraoral scanner. Said intraoral scanner comprises the window system. The optical element and the at least one heat source are connected to the intraoral scanner. The window is disposed in a cover. Said cover can be disposed on the intraoral scanner such that the window has an average distance of less than 1 mm from the optical element.

First claim

1 . Window system for an intraoral scanner, comprising
an optical element having a thermal conductivity of more than 1 W m −1 K −1 , a window, which comprises a pane made of a plastic, glass, or corundum, and which has an average distance (d) of less than 1 mm from the optical element, and at least one heat source connected to the optical element.

2 . Window system according to claim 1 , wherein the optical element has a thermal conductivity of more than 40 W m −1 K −1 .

3 . Window system according to claim 1 , wherein the optical element is made of a corundum.

4 . Window system according to claim 1 , wherein the average distance (d) between the optical element and the window is less than 0.5 mm.

5 . Window system according to claim 1 , wherein the heat source is an ITO layer disposed on the optical element.

6 . Window system according to claim 5 , wherein the ITO layer is an IMITO layer adjusted to the refractive index of the optical element.

7 . Window system according to claim 5 , wherein the ITO layer is disposed only in a peripheral region of the optical element.

8 . Window system according to claim 1 , wherein the heat source is a heat transfer system, which is configured to transfer waste heat from the intraoral scanner to a peripheral region of the optical element.

9 . Window system according to claim 1 , wherein the window includes a material that is selected from the group consisting of a polycarbonate, a cycloolefin copolymer, a polyacrylmethacrylate, a float glass, a mineral glass, a corundum, and mixtures thereof.

10 . Window system according to claim 1 , wherein the window is made of a corundum.

11 . Window system according to claim 1 , wherein the optical element has an anti-reflective coating on either side of the optical element's light path.

12 . Window system according to claim 1 , wherein the window has an anti-reflective coating on either side of the optical element's pane.

13 . Window system according to claim 1 , wherein the window is disposed in a cover for the intraoral scanner.

14 . Intraoral scanner comprising a window system according to claim 13 , wherein the optical element and the at least one heat source are connected to the intraoral scanner and the cover is be disposed on the intraoral scanner such that the window is be disposed on the optical element at an average distance of less than 1 mm.

Assignees

• Sirona Dental Systems Gmbh
• Dentsply Sirona Inc

Inventors

• Kim Hong-Keun
• Wohanka Martin
• Klein Konrad

Classifications

• A61B1/128

  provided with means for regulating temperature · CPC title

• A61B1/00142

  with means for preventing contamination, e.g. by using a sanitary sheath · CPC title

• A61B1/00096 Primary

  Optical elements · CPC title

• A61C9/0053 Primary

  Optical means or methods, e.g. scanning the teeth by a laser or light beam · CPC title

• A61B1/127

  with means for preventing fogging (A61B1/253 takes precedence) · CPC title