19 November 2003 Pulsed UV image amplification for programmable laser marking
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Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003) https://doi.org/10.1117/12.524899
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy
Abstract
We present a novel technique for engraving 2D patterns in one step with a UV pulsed laser by means of a versatile programmable approach. The spatial light modulation is actually performed by a reflective liquid crystal display instead of a mask. As these devices are unable to withstand the high energy throughput required for etching, the modulated beam is amplified by two-wave mixing in a nonlinear optical medium such as lithium niobate crystal optimized for the UV interaction. This technique provides a faster and more flexible alternative to laser marking with pixel by pixel raster-scan or fixed mask projection mode and e.g. can be applied to identify valuable items by imprinting a code onto the surface.
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Thierry Lamarque, Ralf Nicolaus, Brigitte Loiseaux, Jean-Pierre Huignard, Jingjun Xu, "Pulsed UV image amplification for programmable laser marking", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); doi: 10.1117/12.524899; https://doi.org/10.1117/12.524899
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