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. 01, 2004
Filed:
Jan. 13, 1998
Applicant:
Inventors:
Hiroto Ohkawara, Ibaraki-ken, JP;
Taeko Tanaka, Kanagawa-ken, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 5/262 ; H04N 5/232 ;
U.S. Cl.
CPC ...
H04N 5/262 ; H04N 5/232 ;
Abstract
A lens control device comprising a variator lens, a compensation lens for compensating for the displacement of the focal plane associated with the movement of the variator lens, a conversion lens disposed in an optical path in a detachable manner for limiting the area of the movement of the variator lens, and correction means for modifying the area of the movement of the compensation lens in response to the mounting of the conversion lens.