Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Takatoshi Yukimasa

Hideharu Tajima

Minoru Shimizu

Taisuke Saeki

Makoto Ichinose

Kenzo Ishibashi

Tomio Yamamoto

Katsumi Gotoh

Shunsuke Nirei

Nobuyuki Takamori

Akira Kurotsuka

Naohiro Netsu

Osamu Mizuno

Hideki Aikoh

Kanji Wakabayashi

Hiroshi Yamamoto

Akira Yoshikawa

Takuya Wada

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.

Position sensor, optical head device, head moving mechanism, information recording and reproduction device and position control system

A semiconductor laser device according to the present invention includes a mechanism section having a semiconductor laser, a first frame for holding the mechanism section and radiating heat generated in the mechanism section, a control section for controlling the mechanism section, a second frame for holding the control section and radiating heat generated in the control section, and a coupling section for insulatively coupling the first frame to the second frame.

Semiconductor laser device

An optical disc apparatus is provided, which comprising a laser light emitting portion for generating laser light for irradiating an optical disc, and a laser control portion for controlling a light emission operation of the laser light emitting portion. The laser control portion causes the laser light emitting portion to emit light with a first period during a first operation, and the laser control portion causes the laser light emitting portion to emit light with a second period during a second operation. The first period and the second period are different from each other.

Optical disc apparatus, camera apparatus, and method for controlling light emission operation

Transparent disc cartridge

Disc cartridge

Growing community of inventors

Osaka, Japan

Takatoshi Yukimasa