The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 29, 2011
Filed:
Nov. 18, 2009
Franziska Woittennek, Dresden, DE;
Mathias Wölfel, Erlangen, DE;
Klaus Vogler, Eckental, DE;
Olaf Kittelmann, Berlin, DE;
Franziska Woittennek, Dresden, DE;
Mathias Wölfel, Erlangen, DE;
Klaus Vogler, Eckental, DE;
Olaf Kittelmann, Berlin, DE;
Wavelight AG, Erlangen, DE;
Abstract
A laser-assisted material-machining device comprises a laser () for providing a pulsed laser beam (), a measuring arrangement () in order to obtain measured values of a fundamental-wave power of the laser beam and also of a power of at least one higher harmonic generated from the laser beam by frequency multiplication, and an evaluating unit () connected to the measuring arrangement, which has been set up to examine the quality of the laser beam () in a manner depending on the measured fundamental-wave power, on the measured power of the higher harmonic, and on a set radiant power of the laser (). By formation of the quotient of the measured fundamental-wave power and of the measured power of the higher harmonic, the current conversion efficiency of the frequency multiplication can be ascertained. Said conversion efficiency is a measure of the quality of the wavefront and of the pulse duration of the laser beam ().