位置センサ、光ヘッド装置、ヘッド移動機構、情報記録再生装置、および位置制御システム

Title:

位置センサ、光ヘッド装置、ヘッド移動機構、情報記録再生装置、および位置制御システム

Document Type and Number:

Japanese Patent JP4776619

Kind Code:

B2

Abstract:

As imaging devices are miniaturized, and optical devices are miniaturized, lens moving mechanisms are also miniaturized. Thus, position sensors for them are required to be miniaturized and have high accuracy at low cost. A magnet of a pillar shape and a yoke which move in the X axis direction with respect to a magnetic field detection element are provided, and a shape of a cross section of the yoke which is orthogonal to a longitudinal direction of the magnet changes along the longitudinal direction.

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Inventors:

Mizuno Osamu
Yutaka Yamamoto
Takuya Wada
Hideki Aiko
Hiroshi Wakabayashi
Takatoshi Yukimasa

Application Number:

JP2007514614A

Publication Date:

September 21, 2011

Filing Date:

April 18, 2006

Export Citation:

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Assignee:

Panasonic Corporation

International Classes:

G01D5/14; G01B7/00; G02B7/04

Domestic Patent References:

JP2004286637A
JP434312A

Foreign References:

WO2000005548A1

2000-02-03

Attorney, Agent or Firm:

Shinki Global IP Patent Corporation

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