Patent · US Active

Apparatus and method for identifying defects within the volume of a transparent sheet and use of the apparatus

US9546967B2 · kind B2 · utility

1Cited by

5References

20Claims

0Family size

Assignee

Schott AG · DE

Inventors

Bruno Schrader · Eschershausen, DE
Frank Macherey · Wiesbaden, DE
Holger Wegener · Alfeld, DE
Michael Stelzl · Mainz, DE

Key dates

Filing date	Aug 7, 2014
Grant date	Jan 17, 2017
Priority date	—
Expiry date	Feb 12, 2035

Classification

Technology area (CPC G)Physics
CPC primaryG01N2021/8967
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An apparatus for identifying defects within the volume of a transparent sheet, such as a glass sheet, is provided. The apparatus includes an illumination device that directs incident light onto at least a portion of a surface of the sheet so as to illuminate the sheet, and an image detector onto which the light backscattered from the sheet is directed to image the sheet. The apparatus generates at least two interference images under different capturing conditions in order to perform identification of defects by evaluating the at least two interference images.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.