Patent · US Expired

Method for identifying the power output by a laser onto a workpiece

US4818841A · kind A · utility

6Cited by

4References

2Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Eduard Sliva · Munich, DE
Wolfgang Stark · Esslingen am Neckar, DE

Key dates

Filing date	Mar 25, 1988
Grant date	Apr 4, 1989
Priority date	—
Expiry date	Mar 25, 2008

Classification

Technology area (CPC G)Physics
CPC primaryG01J5/44
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A method for identifying laser power evaluates the sound emission signal arising in a workpiece during processing and represents the power of the laser. A calibration curve is established through a plurality of measuring points and is linearized over certain regions to assign a defined power to each mean frequency of the sound emission signal. Undesired deviations of the power can be identified, without problem, by introducing defined tolerance limits of the registered frequency.

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