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:
Feb. 04, 1986
Filed:
Sep. 06, 1983
Yasuo Tomita, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
This specification discloses a magneto-optical information reading apparatus which comprises a device for causing a light beam polarized in a predetermined direction to enter a magnetic recording medium on which information is recorded, an analyzer provided in the optical path of the light beam modulated by the magneto-optic effect in accordance with the information, and a photodetector having the current amplifying function and photoelectrically detecting the light beam transmitted through the analyzer, and in which the following equation is substantially satisfied: ##EQU1## where .phi. is the transmission axis azimuth of the analyzer relative to the predetermined direction of polarization and .eta. is the extinction factor of the analyzer.