The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 29, 2011
Filed:
Dec. 18, 2007
Ingo Koschmieder, Jena, DE;
Manfred Dick, Gefell, DE;
Detlef Biernat, Jena, DE;
Jan Buchheister, Jena, DE;
Lothar Mueller, Ottendorf, DE;
Ingo Koschmieder, Jena, DE;
Manfred Dick, Gefell, DE;
Detlef Biernat, Jena, DE;
Jan Buchheister, Jena, DE;
Lothar Mueller, Ottendorf, DE;
Carl Zeiss Meditec, AG, Jena, DE;
Abstract
The invention is directed to an optical system for a fundus camera for reflection-free opthalmoscopy having a beam path with refractive and reflective optical elements which are used substantially in common for illumination and observation or recording. An imaging mirror system substantially comprising a plurality of reflecting optical elements in the form of mirrors and is provided for illuminating and imaging the fundus. At least one optical element, for example, mirror, is formed as a freeform mirror with an imaging, reflecting freeform surface. The optical elements are arranged in a housing in a precisely defined position and attitude relative to one another in such a way that an imaging of the reflecting surfaces of the optical elements on the image of the imaged retina is prevented within a wide diopter range of the patient's eye to be examined.