Patent · US Active

Method for generating optically perceptible laser-induced cracks in brittle material

US7812281B2 · kind B2 · utility

9Cited by

6References

1Claims

0Family size

Assignee

Jenoptik Automatisierungstechnik GmbH · DE

Inventors

Stefan Acker · Naumburg, DE
Juergen Weisser · Jena, DE
Ronny Ullmann · Kahla, DE

Key dates

Filing date	Jul 13, 2007
Grant date	Oct 12, 2010
Priority date	—
Expiry date	Oct 6, 2028

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T83/0414
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention is directed to a method for generating optically perceptible laser-induced cracks in brittle material, wherein a laser beam, followed by a coolant jet, is guided relative to the surface of the brittle material in order to advance a crack trail into the material starting from an initial crack, and wherein a marking agent which penetrates into the crack during the formation of the crack so as to make the latter visible is mixed with the coolant.

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