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:
Aug. 17, 2010
Filed:
Aug. 05, 2005
Joji Anzai, Osaka, JP;
Shinichi Kadowaki, Hyogo, JP;
Osamu Kajino, Osaka, JP;
Masanari Mohri, Hyogo, JP;
Joji Anzai, Osaka, JP;
Shinichi Kadowaki, Hyogo, JP;
Osamu Kajino, Osaka, JP;
Masanari Mohri, Hyogo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The present invention provides an optical information medium capable of suppressing the influence of reflection light from an unnecessary information recording face and effectively eliminating spherical aberration at the time of recording/reproducing information to/from a recording medium having a plurality of information recording faces. When reflectance of an information recording face is αh and transmittance between information recording faces is th, αh and th of the optical information medium are set so as to satisfy ((α(h−1)×α(h−2))/(th×αh))<0.01.