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:
Feb. 12, 1991
Filed:
Mar. 27, 1989
Applicant:
Inventor:
Ellis I Betensky, Redding, CT (US);
Assignee:
Lenzar Optics Corp., Riviera Beach, FL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350427 ;
Abstract
A compact high zoom ratio lens comprising from the object end a front positive stationary lens unit, a negative variating lens unit, a positive variating lens unit and a compensate lens unit, the variating lens units and the compensator lens unit being axially moveable to vary the equivalent focal length of said lens, the compensator group having an object magnification change of less than twenty-five percent over the zoom range of the lens.