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:
Aug. 22, 1995
Filed:
Mar. 25, 1993
Applicant:
Inventors:
Gerhard Kelch, Aalen, DE;
Hans Lahres, Aalen-Wasseralfingen, DE;
Helmut Wietschorke, Aalen-Wasseralfingen, DE;
Assignee:
Carl-Zeiss-Stiftung, Heidenheim, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02C / ;
U.S. Cl.
CPC ...
351169 ;
Abstract
The invention is directed to a spectacle lens having a multifocal surface and a prescription surface. The prescription surface is a general aspheric surface without point and axis symmetry. Of the individual use conditions, at least the dioptric power is considered within an area when determining the geometry of the prescription surface. The prescription surface is provided exclusively for generating the dioptric power in the reference points and additionally for eliminating the increase of imaging errors.