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. 07, 2011
Filed:
Jul. 31, 2009
Tohru Kimura, Hachioji, JP;
Yuichi Atarashi, Hachioji, JP;
Kiyono Ikenaka, Hino, JP;
Kenji Ogiwara, Hachioji, JP;
Eiji Nomura, Hachioji, JP;
Tohru Kimura, Hachioji, JP;
Yuichi Atarashi, Hachioji, JP;
Kiyono Ikenaka, Hino, JP;
Kenji Ogiwara, Hachioji, JP;
Eiji Nomura, Hachioji, JP;
Konica Minolta Opto, Inc., Tokyo, JP;
Abstract
A light flux from the first light source forms a converged spot on first optical information recording medium by only a refraction action of the aspheric surface, or by a combination of the refraction action and an optical action given by at least one of the first phase structure and the second phase structure, a light flux from the second light source forms a converged spot on second optical recording medium by a combination of a refraction action of the aspheric surface and an optical action given by at least one of the first phase structure and the second phase structure, and a light flux from the third light source forms a converged spot on third optical recording medium by a combination of a refraction action of the aspheric surface and an optical action given by at least one of the first phase structure and the second phase structure.