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:
Oct. 28, 2008
Filed:
Feb. 09, 2006
Applicants:
Xiaoxiao Zhang, Fort Worth, TX (US);
Steve Vannoy, Fort Worth, TX (US);
Xin Hong, Arlington, TX (US);
Inventors:
Xiaoxiao Zhang, Fort Worth, TX (US);
Steve VanNoy, Fort Worth, TX (US);
Xin Hong, Arlington, TX (US);
Assignee:
Alcon Manufacturing, Ltd., Fort Worth, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02C 7/06 (2006.01); A61F 2/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
In one aspect of the invention, a trifocal ophthalmic lens is disclosed that includes an optic having at least one optical surface, and a plurality of diffractive zones that are disposed on a portion of that surface about an optical axis of the optic. At least two of those diffractive zones have different areas so as to cause broadening of optical energy profiles at a near and a far foci of the diffractive zones for generating an intermediate focus.