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:
Apr. 08, 2003
Filed:
Jul. 06, 2001
Fuji Photo Optical Co., Ltd., Saitama, JP;
Abstract
The present invention provides a lens driving apparatus which can accurately detect the position of a movable lens group while preventing the apparatus from increasing in size and cost by using a simple position detecting sensor. A first lens group, a second lens group, and a third lens group are disposed along an optical axis, among which the second lens group is a movable lens group and is movable along the optical axis. The second lens group is movable at two or more different speeds. When the second lens group passes a reference position, it is moved at a speed which is not the highest of the different speeds. As a consequence, the position of the second lens group can be detected accurately.