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Automated beam monitoring and diagnosis for CO/sub 2/ lasers

 
: Mann, S.; Böske, L.; Kaierle, S.; Kreutz, E.W.; Poprawe, R.

Kudryashov, A.V. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Laser Resonators and Beam Control V : 22 - 23 January 2002, San Jose, USA
Bellingham/Wash.: SPIE, 2002 (SPIE Proceedings Series 4629)
ISBN: 0-8194-4368-9
pp.112-121
Conference "Laser Resonators and Beam Control" <5, 2002, San Jose/Calif.>
English
Conference Paper
Fraunhofer ILT ()
automated beam monitoring; CO/sub 2/laser diagnostic; quality management; standard certification; industrial manufacturing; laser material processing; periodical beam diagnosis; quality maintaining measure; workpiece geometry; beam quality factor; pollution; aging; defect; optical component; PC; user-friendly software; fuzzy algorithm; world wide web; Installation

Abstract
The usage of a quality management, in combination with a standard certification, is nearly inevitable for todays industrial manufacturing. In laser materials processing, a periodical beam diagnosis is to be executed as a quality-maintaining measure with any change of the workpiece geometry to guarantee an unambiguous allocation of the beam quality factors. Otherwise changes in the beam quality, caused by pollution, aging or defect of the optical components, remain unidentified for a long time, leading to impairments of the treatment quality or even costly down-times. As a solution a diagnosis system is integrated into a laser system. Data sources like measuring instruments, sensors and laser control transmit the diagnosis data to a diagnosis PC. A user-friendly software, based on fuzzy algorithms, enables the operator to retrace changes in the beam quality to failures of the laser system. All diagnosis data are getting archived in a databank. The access to the archived data through the World Wide Web allows remote diagnoses. With the help of the beam diagnosis system failures can be discovered in advance, and losses of production can be avoided. The gained transparency of the beam characteristic values facilitates the integration of the laser system in the quality management. A prototype installation has been realized and latest results will be demonstrated.

: http://publica.fraunhofer.de/documents/N-16699.html