Optical system for a laser therapy instrument

US10478340B2 · kind B2 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

• Gregor Stobrawa · Jena, DE
• Mark Bischoff · Jena, DE

Key dates

• Filing date: Mar 19, 2012
• Grant date: Nov 19, 2019
• Expiry date: Oct 21, 2035

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2009/00874
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An optical system for a laser therapy instrument for the application of laser radiation on and in the eye, includes a femtosecond laser, an objective. The objective or at least one lens or lens group of the objective is shiftable in the direction of the optical axis being intended for shifting of the focus position from the region of the cornea to the region of the crystalline lens and vice versa. The optical system may include at least two optical assemblies designed for the axial variation of the focus of the therapeutic laser radiation, with the focus variation range Δz differing between the individual assemblies and a changing device, designed for the insertion of any one of these assemblies into the therapeutic laser beam path at a time.