Product Code: ICAL05_1501

CO2 Laser Beam Caustic Measurement with Focal Spot Analyser
Authors:
Flemming Olsen, Technical University of Denmark; Lyngby Denmark
Hui Gong, Technical Univ. of Denmark; Lyngby Denmark
Claus Bagger, Novo Nordisk A/S; Copenhagen Denmark
Presented at ICALEO 2005

In industrial applications of high power CO2-lasers the caustic characteristics of the laser beam have great effects on the performance of the lasers. A well-defined high intense focused spot is essential for reliable production results. This paper presents a focal spot analyser that is developed for measuring the beam profiles of focused high power CO2-lasers. Conduction of the test methods and calculation of the caustic characteristics are based on the ISO standard 11146.

The core of the focal spot analyser is a CCD camera and a high speed rotating cupper-chopper. The test results of the focal spot analyser are compared with that of other market existing equipment. Reliability and usability of the focal spot analyser are considerably high. Besides, the focal spot analyser features that it is small in size and that it has a low weight. The results demonstrate that the focal spot analyser is a greatly eligible instrument for measuring the caustic characteristics of CO2-lasers in industrial applications.

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