Method and device for forming curved sections in a transparent material

US7921852B2 · kind B2 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

• Mario Gerlach · Hohen Neuendorf, DE
• Carsten Lang · Kassel, DE
• Dirk Muhlhoff · Jena, DE
• Markus Sticker · Jena, DE
• Mark Bischoff · Jena, DE
• Michael Bergt · Weimar, DE

Key dates

• Filing date: Jul 13, 2004
• Grant date: Apr 12, 2011
• Expiry date: Jul 3, 2028

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2009/00872
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The invention relates to a method for forming curved sections in a transparent material, especially in a cornea, by producing optical breaks at various points in the material by means of pulsed laser beams focused into the material. The laser beam is deviated in a two-dimensional manner from a deviation point in order to form the section by arranging the optical breaks in a sequence. The two-dimensional deviation occurs such that the areas of the optical opening along a curve, whereon the optical openings are arranged in a sequence, are arranged at a distance in relation to the deviation point according to an angle function which is not linear and which is adapted to the curvature of the section. The areas along the curve adjacent to optical openings inside a specific tolerance range are arranged at an even distance.