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:
Sep. 21, 1993
Filed:
Sep. 27, 1991
Kazuhiko Nakane, Amagasaki, JP;
Kyosuke Yoshimoto, Amagasaki, JP;
Yoshihiro Kiyose, Amagasaki, JP;
Teruo Furukawa, Amagasaki, JP;
Akira Mashimo, Tokorozawa, JP;
Hiroyuki Onda, Hoya, JP;
Hidehiko Murata, Niiza, JP;
Takuya Nagata, Hoya, JP;
Mitsubishi Electric Corporation, both of, JP;
TEAC Corporation, both of, JP;
Abstract
An optical or magneto-optical disk storage which automatically adjusts a recording/reproducing level of a number of kinds of optical or magneto-optical disks having different recording/reproducing levels to an optimum recording/reproducing level. The optical or magneto-optical disk storage has an attenuator which applies a predetermined attenuation amount to a reproduced signal reproduced from an optical or magneto-optical disk so as to attenuate the reproduced signal, or intensity adjusting means for adjusting the intensity of a laser beam used for recording and/or reproducing. The optical or magneto-optical disk storage detects an amplitude of the reproduced signal and feed-back-controls the attenuation amount or intensity of the laser beam in accordance with the detected amplitude.