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. 18, 1999
Filed:
Sep. 30, 1997
Yang-Oh Choi, Seoul, KR;
Daewoo Electronics Co., Ltd., Seoul, KR;
Abstract
An optical pickup system reads an information signal from stored on a recording surface of an optical disk. The optical pickup system includes a light source for generating a light beam including a P and an S polarization component with a wavelength .lambda..sub.1, a 1/4.lambda. plate for changing the polarization component of the light beam transmitted therethrough, an optical detector for detecting the information signal off the optical disk, and a beam splitter, provided with a first and a second surface, the first surface being capable of reflecting one of the polarization components to the optical disk through the 1/4.lambda. plate and transmitting the light beam reflected from the optical disk changed its polarization component by passing through the 1/4.lambda. plate to the second surface being capable of reflecting the light beam impinging thereon to the detecting means, thereby allowing the optical pickup system to read the information signals off the recording surface.