Imaging unit for ophthalmological devices, in particular, for fundus cameras and method for the use thereof

US7802885B2 · kind B2 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

• Detlef Biernat · Jena, DE
• Ingo Koschmieder · Jena, DE
• Bernhard Rassow · Hamburg, DE
• Thomas Mohr · Jena, DE

Key dates

• Filing date: Jun 22, 2006
• Grant date: Sep 28, 2010
• Expiry date: Apr 30, 2027

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B3/12
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A stripe pattern of known distance is imaged on the ocular fundus by the imaging unit for opthalmological devices. This makes it possible to carry out absolute measurements of distances and objects at the ocular fundus with knowledge of the initial values serving as a basis. The imaging unit for opthalmological devices, particularly fundus cameras, according to the invention comprises a device for generating and imaging any, but a known, stripe pattern or line pattern on the retina of an eye to be examined, a camera for recording the stripe pattern or line pattern on the retina, and an evaluating unit for determining the distances on the retina. The imaging unit is constructed in such a way that the stripe pattern or line pattern to be imaged is coupled into the beam path between the opthalmological device and the eye to be examined. The use of an imaging unit of this kind as an accessory to opthalmological devices also expands the possibilities for its use in measurements at the ocular fundus. Although the proposed solution is particularly suited to fundus cameras, it can also be used for other opthalmological device.