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. 23, 1977
Filed:
Jul. 16, 1976
Applicant:
Inventor:
Nathan Gottlieb, Kenmore, NY (US);
Assignee:
American Optical Corporation, Southbridge, MA (US);
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350181 ; 350190 ;
Abstract
Variable focal power along one principal meridian may be obtained by an optical system having two cylinder lenses at either end and their axis of cylinder in a single plane spaced along an optical axis. A moveable cylinder lens with its axis oriented 90.degree. to the plane is slideably mounted therebetween. A plano color correction plate substantially eliminates color aberrations which would otherwise be present in the system.