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17 February 2010 Applying refractive beam shapers in creating spots of uniform intensity and various shapes
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Proceedings Volume 7579, Laser Resonators and Beam Control XII; 75790N (2010)
Event: SPIE LASE, 2010, San Francisco, California, United States
Different scientific and industrial laser techniques require not only intensity profile transformation but also creating various shapes of final spots like circles of different diameter, lines and others. As a solution it is suggested to apply combined optical systems consisting of a refractive beam shaper of field mapping type providing a required intensity transformation and additional optical components to vary the shape of final spots. The said beam shapers produce low divergence collimated flattop beam that makes it easy to vary the shape of the beam spot with using either ordinary relay imaging optics, including zoom one, or anamorphotic optics. And the design features of the refractive beam shapers allow controlling the intensity distribution in the final spot (most often flattop one) and providing wide range of spot sizes. This paper will describe some design examples of combined beam shaping systems to create round spots of variable diameter as well as linear spots of uniform intensity. There will be presented results of applying these systems in such applications as laser hardening and others.
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Alexander Laskin, Gavin Williams, and Alexander Demidovich "Applying refractive beam shapers in creating spots of uniform intensity and various shapes", Proc. SPIE 7579, Laser Resonators and Beam Control XII, 75790N (17 February 2010);

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