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. 16, 2005
Filed:
Mar. 29, 2002
Yasumitsu Wada, Tsurugashima, JP;
Yasumitsu Wada, Tsurugashima, JP;
Pioneer Corporation, Tokyo-to, JP;
Abstract
Disclosed is a grooving apparatus which can carry information on an information track at high recording density when carrying the information on the information track through a change in shape of a groove and which also can improve the signal-to-noise ratio of the information under reproduction. A grooving apparatus for forming a groove to function as an information track in an optical disk comprises an electron beam generator which emits an electron beam, an objective lens which focuses the emitted electron beam on the optical disk and which focuses the electron beam on a smaller range than the size of the groove, and an X-direction deflector and a Y-direction deflector which controls the electron beam so that the electron beam is focused in position on the optical disk, thereby forming the groove in the optical disk.