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:
Apr. 25, 2006
Filed:
Sep. 16, 2002
Mizuki Nakamura, Iwata-gun, JP;
Atsushi Kitamura, Iwata-gun, JP;
Kozo Matsumoto, Iwata-gun, JP;
Motoji Egawa, Iwata-gun, JP;
Mizuki Nakamura, Iwata-gun, JP;
Atsushi Kitamura, Iwata-gun, JP;
Kozo Matsumoto, Iwata-gun, JP;
Motoji Egawa, Iwata-gun, JP;
Minebea Co., LTD, Kitasaku, JP;
Abstract
An optical pickup apparatus for reading and recording information on recording media includes a semiconductor laser, a collimating lens, a half mirror, a reflecting mirror, and an objective lens. Further included therein are a super-resolution cutoff filter and an aperture control filter, one of which is appropriately selected and set right before the objective lens by a filter switching-over device. When reading the DVD, the super-resolution cutoff filter is set at the optical path, whereas when reading the CD, the aperture control filter is set thereat. The filter switching device is arranged separately from an actuator driving system having the objective lens integrally structured therewith.