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. 11, 2002
Filed:
Oct. 06, 2000
Tomoaki Morishita, Shizuoka, JP;
Sony Corporation, , JP;
Abstract
An optical pickup device is positioned in confronting relationship to an optical disc for reading an information signal from and/or writing an information signal on the optical disc. The optical pickup device includes an optical unit having at least a light source for emitting a light beam and a photodetector for detecting a light beam returned from the optical recording medium, and a converging system for converging the light beam emitted from the light source onto a signal recording surface of the optical recording medium. The optical unit includes a light guide for guiding the light beam toward the converging system and a light-transmissive optical plate covering the light guide.