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:
Jun. 07, 1988
Filed:
May. 28, 1985
Applicant:
Inventors:
Jacob Moskovich, Cincinnati, OH (US);
Ellis I Betensky, Redding, CT (US);
Assignee:
Vivitar Corporation, Chatsworth, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350429 ;
Abstract
An automatic focusing zoom lens which comprises a first positive group, a second variator group, a third compensator group, and a relay lens including an autofocus detector which receives a portion of the light entering the fourth group and controls a motor which drives the compensator group to maintain focus of the lens as well as compensating or the shift in focal plane due to movement of the variator group to change the equivalent focal length of the lens.