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. 08, 2009
Filed:
Oct. 25, 2004
Takuji Hatano, Suita, JP;
Katsuya Yagi, Hino, JP;
Yuichi Atarashi, Hachioji, JP;
Yuichiro Ori, Moriyama, JP;
Takuji Hatano, Suita, JP;
Katsuya Yagi, Hino, JP;
Yuichi Atarashi, Hachioji, JP;
Yuichiro Ori, Moriyama, JP;
Konica Minolta Opto, Inc., Hachioji-shi, JP;
Abstract
An optical pickup apparatus has a semiconductor laser source which emits a laser beam in a wavelength band of 405 nm having an elliptic light intensity distribution; a beam shaping element which shapes the light intensity distribution of the laser beam; a polarizing beam splitter having a polarized light separation film in contact with the air and reflecting the laser beam shaped by the beam shaping element on the polarized light separation film; and an objective lens which focuses the laser beam reflected on the polarized light separation film onto an optical information recording medium.