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:
Oct. 30, 1990
Filed:
Sep. 13, 1989
Tsuneharu Takeda, Tokyo, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
A magnetic apparatus includes a magnetic semiconductor thin film, a power source for generating an electric field, an electrode for supplying charge from the power source to the magnetic thin film, a polarizer for linearly polarizing light emitted on the magnetic semiconductor thin film in a specific direction, and an analyzer for transmitting polarized light when the polarized light upon transmission through the magnetic semiconductor thin film has a specific Faraday rotational angle. When the electric field is applied to the magnetic semiconductor thin film, the magnetic order-disorder transition temperature of the film is changed to change a Faraday rotational angle. The light is transmitted through or shielded by the analyzer in correspondence with the Faraday rotational angle.