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:
May. 06, 1997
Filed:
May. 30, 1995
Shohei Kobayashi, Hachioji, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
An optical head for recording and reproducing information on and from an opto-magnetic record medium by projecting a light beam onto the record medium and introducing a return light beam reflected by the record medium onto photodetectors, including a light source for emitting a linearly polarized light beam, an objective lens for projection the light beam onto the record medium, and an optical element having a surface on which a beam splitting surface is provided in the diverging or converging return beam. Said beam splitting surface is curved such that light rays of the return light beam are made incident upon the beam splitting surface at substantially the same incident angle, so that the return light beam can be split accurately into P-polarized and S-polarized light beams.