Method for calibrating the pulse energy of a laser device...

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B23K 26/03 (2006.01) A61F 9/008 (2006.01) B23K 26/36 (2006.01) B23K 26/40 (2006.01) G01B 9/02 (2006.01)

Patent

CA 2735281

In a method of calibrating the pulse energy of a laser device which provides pulsed working laser radiation, by means of the working laser radiation, multiple test ablations, in particular multiple-pulse test ablations, are carried out on one or more test objects, each with different pulse energy. The ablation depth of each of the test ablations is measured, and then, on the basis of the measured ablation depths and a specified setpoint ablation depth, an associated setpoint pulse energy is determined and set on the laser device. According to the invention, the ablation depths are measured by means of a coherent optical interferometric measuring device. The invention also concerns a laser device, in particular to carry out the above method.

L'invention concerne un procédé d'étalonnage de l'énergie d'impulsion d'un dispositif laser (110) qui génère un rayonnement laser de travail pulsé, ce rayonnement laser de travail étant utilisé pour effectuer plusieurs ablations d'essai, en particulier des ablations d'essai à impulsions multiples, sur un ou plusieurs objets d'essai (108), avec des énergies d'impulsions respectivement différentes. On mesure la profondeur d'ablation de chacune des ablations d'essai, puis, sur la base des profondeurs d'ablation mesurées et d'une profondeur d'ablation de consigne prédéfinie, on détermine une énergie d'impulsion de consigne correspondante, et on l'ajuste au dispositif laser. Selon l'invention, les profondeurs d'ablation sont mesurées à l'aide d'un dispositif de mesure interférométrique (130) à optique de cohérence. L'invention porte en outre sur un dispositif laser, en particulier pour la mise en uvre du procédé ci-dessus.

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