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:
Mar. 22, 2005
Filed:
Sep. 24, 2001
Norio Numako, Tochigi, JP;
Norio Numako, Tochigi, JP;
PENTAX Corporation, Tokyo, JP;
Abstract
A lens drive control apparatus for a camera having a zoom lens provided with variable lens groups, at least one of the variable lens groups including a switching lens group having two sub lens groups, wherein one of the two sub lens groups serves as a movable sub lens group. The lens drive control apparatus includes a main drive device for moving the plurality of variable lens groups; and a sub lens group drive device for moving the movable sub lens group within the switching lens group to be positioned at a movement extremity on the object side or the image side, with respect to the other sub lens group, in accordance with a zooming zone from the short focal length extremity to an intermediate focal length position, or a zooming zone from the intermediate focal length to the long focal length extremity.