Increasing The Flexibility Of Beam Integrating Multifaceted Mirrors For High Power Laser Surface Treatments

Maichi Cantello; Marco Celani; Diego Cruciani; Alberto Salvoni

doi:10.1117/12.950186

28 March 1989 Increasing The Flexibility Of Beam Integrating Multifaceted Mirrors For High Power Laser Surface Treatments

Maichi Cantello, Marco Celani, Diego Cruciani, Alberto Salvoni

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Proceedings Volume 1024, Beam Diagnostics and Beam Handling Systems; (1989) https://doi.org/10.1117/12.950186
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany

Abstract

Multifaceted mirrors for providing uniform intensity of the laser beam over a well-defined area are a valid alternative to kaleidoscopes and scanning optics in laser surface treatment applications. Beam integrators usually provide intensity distribution uniformity of higher quality but their applications are limited since they are less flexible than kaleidoscopes and scanning optics. Optical reimaging systems increase their flexibility but nevertheless they are still difficult to handle automatically due to the large number of degrees of freedom to be controlled. New arrangements of reimaging systems are currently being studied at RTM and the results are discussed in this paper. Initially a converging beam integrator was applied with a single spherical mirror used as a reimaging system. Flexibility was achieved by manually adjusting the position of the spherical mirror. A more complex reimaging system, based on several mirrors, was designed and assembled. The performances of both systems were tested in laser surface treatment applications with laser powers of up to 15 kW. Diverging beam integrators were considered on account of their low cost and wider availability in Italy. Reimaging of these beam integrators presents different problems and offers new possibilities. Reimaging systems with automatic handling of the mirrors were designed by RTM researchers The problems and advantages of these automatic and flexible beam integrating systems are discussed in detail.

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Maichi Cantello, Marco Celani, Diego Cruciani, and Alberto Salvoni "Increasing The Flexibility Of Beam Integrating Multifaceted Mirrors For High Power Laser Surface Treatments", Proc. SPIE 1024, Beam Diagnostics and Beam Handling Systems, (28 March 1989); https://doi.org/10.1117/12.950186

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KEYWORDS

Mirrors

Spherical lenses

Laser sources

High power lasers

Laser therapeutics

Diagnostics

Heat treatments

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