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:
Sep. 17, 2002
Filed:
Nov. 03, 2000
Makoto Kawamura, Tokorozawa, JP;
Shinichi Takahashi, Tokorozawa, JP;
Hirokatsu Nagatake, Tokorozawa, JP;
Aki Yoshioka, Tokorozawa, JP;
Mitsutoshi Sugano, Tokorozawa, JP;
Ko Ishii, Tokorozawa, JP;
Akira Miura, Tokorozawa, JP;
Masayuki Koyama, Tokorozawa, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
An optical pickup apparatus capable of reading information from recording media of different read wavelengths, includes a light-emitter having a first light source for emitting a first laser beam integrated with a second light source for emitting a second laser beam of a different wavelength from that of the first laser beam. The optical pickup apparatus includes a photodetector for receiving a beam reflected by each of the recording media and an optical system having a plurality of optical elements which form an optical path to guide the first and second laser beams to the recording media and which form an optical path for guiding the reflected beam to the photodetector and through which the first and second laser beams pass.