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. 19, 2002
Filed:
Aug. 03, 2000
Applicant:
Inventors:
Roland Bergner, Jena, DE;
Lothar Mueller, Ottendorf, DE;
Assignee:
Carl Zeiss Jena GmbH, Jena, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61B 3/00 ;
U.S. Cl.
CPC ...
A61B 3/00 ;
Abstract
A testing and calibrating device for optical eye length measurement devices comprising two plano-convex lenses which are arranged in the illumination beam path so as to be oppositely oriented. A neutral filter with a defined transmission is located between these two plano-convex lenses.