Influence of the focusing element for CO2 laser beams on monitored process signals

Stephan Fazeny; Andreas Penz; Markus Bohrer; Dieter Schuoecker

doi:10.1117/12.287758

25 September 1997 Influence of the focusing element for CO2 laser beams on monitored process signals

Stephan Fazeny, Andreas Penz, Markus Bohrer, Dieter Schuoecker

Proceedings Volume 3100, Sensors, Sensor Systems, and Sensor Data Processing; (1997) https://doi.org/10.1117/12.287758
Event: Lasers and Optics in Manufacturing III, 1997, Munich, Germany

Abstract

In typical optical sensor setups for CO₂ laser material processing scraper mirrors or beam selectors (ZnSe mirrors) are used to allow sensor positions which have a coaxial path for both the laser beam and the monitored visible or near- infrared signal. Calculations and experiments have shown a vital influence of the focusing element for the laser beam on the measured signal. Critical topics are the distance between focusing element and monitored process, as well as the dependence of focal length on wavelength.

Citation Download Citation

Stephan Fazeny, Andreas Penz, Markus Bohrer, and Dieter Schuoecker "Influence of the focusing element for CO2 laser beams on monitored process signals", Proc. SPIE 3100, Sensors, Sensor Systems, and Sensor Data Processing, (25 September 1997); https://doi.org/10.1117/12.287758

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