Illuminating system for determining the topography of the cornea of an eye

US11759105B2 · kind B2 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

• Beate Böhme · Kahla, DE
• Rico Fuchs · Jena, DE
• Günter Rudolph · Jork, DE
• Michael Güntzschel · Jena, DE
• Jörg Meissner · Jena, DE
• Thomas Mohr · Jena, DE
• Daniel Bublitz · Glinde, DE

Key dates

• Filing date: Aug 31, 2017
• Grant date: Sep 19, 2023
• Expiry date: Aug 27, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01B11/25
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An illumination system for producing a spatially distributed illumination pattern for measuring the cornea of an eye and, in particular, for determining the topography of the eye. In so doing, the system facilitates distance-independent measurements. The illumination system includes an illumination unit, an optical element for collimating the illumination light and a unit for producing a spatially distributed illumination pattern in the form of a fraxicon. In particular, the illumination unit includes a plurality of illumination modules which are arranged such that each illumination module illuminates part of the fraxicon, and consequently a full-area illumination is facilitated. The system for producing a spatially distributed illumination pattern serves to determine the topography of the cornea of an eye. Here, the system is designed as a compact module, and so it can be easily combined with other measurement systems, without interfering with the beam paths thereof.