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:
Aug. 13, 2019
Filed:
Nov. 05, 2018
Olympus Corporation, Hachioji-shi, Tokyo, JP;
Rintaro Nishihara, Hachioji, JP;
OLYMPUS CORPORATION, Tokyo, JP;
Abstract
A position detection apparatus is configured to detect a position of a movable portion relative to a fixed portion using a voice coil motor (VCM) driving portion. The position detection apparatus includes a position detection element arranged on one of the movable portion and the fixed portion, and a first position detection magnet and a second position detection magnet arranged on another of the movable portion and the fixed portion. The first position detection magnet and the second position detection magnet are aligned so that different magnetic poles face a surface of the position detection element. The first position detection magnet and the second position detection magnet are arranged in an order in a moving direction of the movable portion such that magnitudes of densities of magnetic fluxes reaching the surface of the position detection element from the first position detection magnet and the second position detection magnet are different.