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:
Feb. 01, 2000
Filed:
Oct. 27, 1997
Yang-Oh Choi, Seoul, KR;
Daewoo Electronics Co., Ltd., , KR;
Abstract
An optical pickup system reads an information signal stored on a recording surface of an optical disk. The optical pickup system comprises a light source for generating a light beam, an optical detector for detecting the information signal off the optical disk, an objective lens for focusing a portion of the light beam impinged thereonto on the optical disk, and converging the light beam reflected by the optical disk on the optical detector and a knife edge provided with a parallelopiped base, made of a material transparent to the light beam, a first and a reflection layers formed on the parallelopiped base, wherein the second reflection layer reflects the portion of the light beam to the objective lens and the first reflection layer reflects the light beam reflected from the optical disk to the optical detector to thereby allowing the optical pickup system to read the information signals off the optical disk.