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. 15, 1997
Filed:
Feb. 27, 1995
Takayuki Nomoto, Tsurugashima, JP;
Pioneer Electronic Corporation, Tokyo-to, JP;
Abstract
An optical disk includes: an information recording surface; first surface-transformed portion array formed on the information recording surface and including first surface-transformed portions transformed in shapes, the first surface-transformed portion reflecting a laser light, when it is irradiated thereon, polarized in accordance with the transformed shape thereof so that major axis of the polarized light is oriented to a first direction; and second surface-transformed portion array formed on the information recording surface and including second surface-transformed portions transformed in shapes, the second surface-transformed portion reflecting a laser light, when it is irradiated thereon, polarized in accordance with the transformed shape thereof so that major axis of the polarized light is oriented to a second direction. The first surface-transformed portion array and the second surface-transformed portion array are formed alternately in a radial direction of the optical disk, and the first direction and the second direction differ from each other by 45 degrees.