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:
Jun. 26, 1990
Filed:
Aug. 21, 1989
Norio Hashimoto, Tokyo, JP;
Eiichi Fujii, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optomagnetic (magneto-optic) information reproducing or readout method including illuminating an optomagnetic (magneto-optic) recording medium with a linearly polarized light flux whose quantity is variable, detecting the value of the illumination flux from the recording medium through an analyzer, determining a threshold quantity of light at which the ratio between the detected value and the quantity of illumination light starts to deviate from a predetermined value, and scanning the recording medium with the linearly polarized light flux whose quantity is smaller than the threshold quantity of light, thereby reproducing or reading out the information stored on the recording medium. A device adapted to carry out the above-described method is also described.