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. 15, 1984
Filed:
Mar. 27, 1981
Junichi Shimada, Ibaragi, JP;
Yoshinobu Mitsuhashi, Ibaragi, JP;
Kenjiro Sakurai, Ibaragi, JP;
Takitaro Morikawa, Ibaragi, JP;
Shuichi Mitsuzuka, Toda, JP;
Agency of Industrial Science and Technology, Tokyo, JP;
Ministry of International Trade and Industry, Tokyo, JP;
Abstract
An optical information processing apparatus comprises an information recording medium, a semiconductor laser diode for issuing a laser beam and an optical system adapted to direct the issued laser beam from the semiconductor laser diode toward the information recording medium and then return the reflected laser beam from the medium to the diode and provided with means capable of rotating the plane of polarization of the reflected laser beam from the medium by 90.degree. relative to the plane of polarization of the issued laser beam.