Other

Sanyo Electric Co., Ltd.

Matsushita Electronics Corporation

Muramoto Industry Co., Ltd.

Keiji Nagata

Masanori Morii

Tadashi Muramoto

Toshio Ishii

Kenji Asano

Shigekazu Minechika

Tadashi Okajima

Hideaki Yano

Yoshihiro Aoi

Ichizo Sakamoto

A disc apparatus () includes an optical lens (). A laser beam is irradiated onto a recording surface of the magneto-optical disc () through the optical lens (), and a TE signal or an RF signal is detected on the basis of the laser beam reflected by the recording surface. Herein, an MPU () replaces the optical lens () in an optical axis direction, and a TE signal detection circuit () or an RF signal detection circuit () detects the TE signal or the RF signal at each of lens positions. A laser power is adjusted by the MPU () such that amplitude of each of the TE signal or the RF signal detected is below a saturation value. When a parameter is adjusted, a position of the optical lens () is controlled such that the amplitude of the TE signal or the RF signal detected thereafter is maximized.

Disc apparatus for reproducing a signal on a disc using a laser beam

The present invention relates to a cathode ray tube having an inner magnetic shield and to a method for fixing the inner magnetic shield. The inner magnetic shield is fixed to a frame supporting a shadow mask simply with fixing members. First engagement holes are provided on each side of a first flange portion of the frame, and second engagement holes are provided on each side of a second flange portion of the inner magnetic shield. Each side of the second engagement hole is provided with a folding portion. The fixing member is inserted so as to put into the first engagement hole and the second engagement hole facing the first engagement hole from the side of the inner magnetic shield.

Cathode ray tube and method for manufacturing the same

Cathode ray tube and method of manufacturing the same

Growing community of inventors

Osaka, Japan

Keiji Nagata