Patent · US Active

Method for measuring the distance between a workpiece and a machining head of a laser machining apparatus

US9770783B2 · kind B2 · utility

0Cited by

6References

15Claims

0Family size

Assignee

PRECITEC OPTRONIK GMBH · DE

Inventors

Martin Schoenleber · Aschaffenburg, DE
Markus Kogel-Hollacher · Haibach, DE
Thibault Bautze · Karlsruhe, DE

Key dates

Filing date	Jul 31, 2015
Grant date	Sep 26, 2017
Priority date	—
Expiry date	Mar 1, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG01B21/042
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

According to a method for measuring the distance between a workpiece and a machining head of a laser machining apparatus, a machining head is provided, which has a housing that has an interior and an opening for emergence of the laser radiation from the machining head. The laser radiation is directed on to the workpiece, after it has passed through the interior and the opening. An object beam is directed on to the workpiece by a light source of an optical coherence tomograph in such a manner that the object beam passes through the interior and the opening before being incident upon the workpiece. In addition to the object beam, a measuring beam passes through the interior. The measuring beam is used to compensate falsifications of the measured distance that have been caused by pressure fluctuations in the interior. The measuring beam in this case may be reflected at a reflective face that is formed on an inner face of an outlet nozzle that comprises the opening, which inner face delimits the interior.

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