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. 16, 1997
Filed:
Apr. 18, 1996
Tohru Sasaki, Yokohama, JP;
Takeshi Shimano, Tokorozawa, JP;
Yoshiro Konishi, Hiratsuka, JP;
Toshimasa Kamisada, Hiratsuka, JP;
Motoyuki Suzuki, Yokohama, JP;
Naoki Mori, Yokohama, JP;
Masayuki Fukui, Hiratsuka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A magneto-optic disk apparatus for use with a magneto-optic disk in which a recording surface made of a magneto-optic information recording medium is formed on a transparent substrate having a birefringence. The magneto-optic disk apparatus includes an optical head for performing a recording and a reproduction by a laser beam for the recording surface, and a unit for eliminating a fluctuation component occurring in a reproduction magneto-optic signal, the fluctuation component eliminating unit being arranged in a convergent light up to an analyzer in a detection optical system.