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:
Mar. 25, 2003
Filed:
Jul. 11, 2000
Applicant:
Inventor:
Werner Fiala, Vienna, AT;
Assignee:
Bifocon Optics GmbH, Vienna, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02C 7/06 ; G02C 7/04 ; G02B 2/744 ; G02B 5/08 ; A61F 2/16 ;
U.S. Cl.
CPC ...
G02C 7/06 ; G02C 7/04 ; G02B 2/744 ; G02B 5/08 ; A61F 2/16 ;
Abstract
A multifocal lens including annular zones wherein each annular zone is divided into at least two annular sub-zones. Preferably, no geometric or optical optical steps are present between annular zones or annular sub-zones. The refractive powers within the annular sub-zones are chosen such that the lens exhibits at least two diffractive powers and that at least one of those diffractive powers substantially coincides with the average refractive power of each annular zone.