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:
May. 20, 1980
Filed:
Aug. 02, 1976
Applicant:
Inventor:
Staffan B Persson, Kenmore, NY (US);
Assignee:
American Optical Corporation, Southbridge, MA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350181 ; 350187 ;
Abstract
An apparatus, including a pair of spaced-cylinder lenses having their cylinder axes in one plane with a third cylinder lens slideably mounted on a carriage therebetween and having its cylinder axis positioned normal to the plane, permits the focal power in one principal meridian to be continuously varied by moving the carriage with the third cylinder lens. The lenses are supported by a rotatable assembly and the slideable carriage is supported by a track running parallel to the optical axis.