Ophthalmological laser system and operating method

US10182942B2 · kind B2 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

• Matthias Reich · Jena, DE
• Dieter Grebner
• Andreas Koch · Heiligenhaus, DE
• Juergen Ledermann · Jena, DE
• Manfred Dick · Gefell, DE
• Marco Hanft · Jena, DE

Key dates

• Filing date: Dec 15, 2014
• Grant date: Jan 22, 2019
• Expiry date: Aug 25, 2035

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2009/0087
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A polarization beam splitter selectively decouples detection light onto a detector such that it has a polarization direction that differs from the emitted illumination light. This enables the detection of the light scattered back in the eye lens at a high level of accuracy, since stray light from reflections at optical components of the light path is suppressed. In the generating of photo disruptions or other incisions, the ray exposure of the retina may be reduced in that the incisions being furthest away from the laser are induced first such that laminar gas inclusions with an existence duration time of at least 5 seconds result. In this manner the laser radiation propagated in the direction of the retina in further incisions are scattered and partially reflected such that the influence impinging upon the retina is reduced.