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Verfahren zur Veraenderung des optischen Verhaltens an der Oberflaeche und/oder innerhalb eines Werkstueckes mittels eines Lasers

Method for changing optical property at surface and/or inside workpiece using laser.
 
: Lenk, A.

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Frontpage ()

DE 1997-19753248 A: 19971201
DE 1997-19753248 A: 19971201
DE 19753248 A1: 19990610
B23K0026
German
Patent, Electronic Publication
Fraunhofer IWS ()

Abstract
NOVELTY - The method involves conducting an energy input by a focused laser beam at and/or in a transparent workpiece for a laser. Two or more laser pulses in quick succession are implemented. A mode-synchronized and Q-switched rigid body laser is used. A spacing is adjusted between at least two pulses and the pulses follow one another at least at a spacing where the changes of the optical property of the previous pulse are effective with the following pulse. DETAILED DESCRIPTION - A programmable 2D or 3D relative movement is implemented between the laser beam and the workpiece, synchronized between the course of movement and the laser pulses. USE - For changing optical property at surface and/or inside workpiece using laser. ADVANTAGE - The optical property changes are implemented in a comparatively large depth and with a high pulse frequency.

: http://publica.fraunhofer.de/documents/PX-39558.html