Device for processing eye tissue by means of a pulsed laser beam

US9566190B2 · kind B2 · utility

Assignee

• SIE AG Surgical Instrument Engineering · CH

Inventors

• Christian Rathjen · Bremen, DE
• Hartmut Kanngiesser · Zürich, CH
• Vincent Ducry · Fribourg, CH
• Lorenz Klauser · Meikirch, CH

Key dates

• Filing date: Nov 19, 2012
• Grant date: Feb 14, 2017
• Expiry date: Feb 11, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01B9/02
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

For processing eye tissue using a pulsed laser beam (L), an ophthalmological device includes a projection optical unit for the focused projection of the laser beam (L) into the eye tissue, and a scanner system upstream of the projection optical unit for the beam-deflecting scanning of the eye tissue with the laser beam (L) in a scanning movement (s′) performed over a scanning angle along a scanning line (s). The ophthalmological device includes a divergence modulator disposed upstream of the scanner system for dynamically varying the divergence of the laser beam (L), whereby the scanning line (s) is tilted in a plane running through the optical axis of the projection optical unit and the scanning line(s). The tilting of the scanning line(s) enables a displacement—dependent on the scanning angle—of the focus of the laser pulses projected into the eye tissue without vertical displacement of the projection optical unit.