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:
Feb. 20, 2007
Filed:
Oct. 04, 2002
Kenzo Ishibashi, Moriguchi, JP;
Keiji Nishikiori, Yawata, JP;
Yasumori Hino, Ikoma, JP;
Masahiro Birukawa, Hirakata, JP;
Kenzo Ishibashi, Moriguchi, JP;
Keiji Nishikiori, Yawata, JP;
Yasumori Hino, Ikoma, JP;
Masahiro Birukawa, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An optical disc cutting apparatus capable of suppressing an unnecessary deflection component and unnecessary light intensity variation component and manufacturing a optical disc suitable for a high definition, high precision and high density optical disc. The optical disc cutting apparatus includes a light beam controller including at least one of an optical modulator for controlling the light intensity of light beam emitted from a laser beam source and an optical deflector for controlling the deflection amount of the light beam in the radial direction on an optical disc original master, a deflection error detector for detecting a deflection error in the radial direction included in the light beams controlled by the light beam controller, a second optical deflector, which is disposed between the light beam controller and the deflection error detector, for deflecting the light beams in the radial direction, and a feedback controller for feeding back a feedback signal using the deflection error in the radial direction to the second optical deflector.