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. 15, 2009
Filed:
Jul. 19, 2007
Toshiaki Katsuma, Saitama, JP;
Masao Mori, Saitama, JP;
Yu Kitahara, Saitama, JP;
Tetsuya Ori, Saitama, JP;
Toshiaki Katsuma, Saitama, JP;
Masao Mori, Saitama, JP;
Yu Kitahara, Saitama, JP;
Tetsuya Ori, Saitama, JP;
Fujinon Corporation, Saitama-shi, Saitama, JP;
Abstract
A laser beam output from a semiconductor laser light sourceis transmitted through a cover glassin the optical axis Z direction, is incident on a molded lensin a state of divergent rays, is converted into convergent rays by the molded lens, and is applied onto a recording faceof the optical recording medium. A diaphragmis arranged. An area of each lens surface onto which a luminous flux of the laser beam restricted by the diaphragmis applied corresponds to an effective area. The following expression (1) is satisfied:≧0.04 mm  (1)