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:
Dec. 10, 1996
Filed:
Apr. 04, 1994
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A lens barrel constructed of a cam slot, a lens cylinder, a memory, a detector, a motor drive and a controller. The cam slot has a discontinuous area formed in a portion corresponding to a parting line of a molding die used for molding. The lens cylinder has a cam follower slidably engaging the cam slot. The memory stores information indicating where the discontinuous area exists in the cam slot. The detector detects where the cam follower is positioned in the cam slot. The motor drive makes the lens cylinder progress and retreat in the optical-axis direction by driving one of the cam slot and the lens cylinder relative to the other. The controller controls the motor drive to drive the lens cylinder up to a position deviating from the discontinuous area when the cam follower is in the discontinuous area by comparing memory information of the memory with detection information of the detector.