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    • 146. 发明授权
    • Optical disk device
    • 光盘装置
    • US08174943B2
    • 2012-05-08
    • US12739973
    • 2008-11-07
    • Katsuya WatanabeShinichi Yamamoto
    • Katsuya WatanabeShinichi Yamamoto
    • G11B20/10
    • G11B7/00375G11B7/0079G11B7/1275G11B20/1262G11B20/1816G11B2007/0006G11B2007/0013G11B2020/1823G11B2220/2541G11B2220/2583
    • An optical disc apparatus according to the present invention includes: a laser light source for emitting multiple light beams, of which the wavelengths are different from each other and include a first wavelength and a second wavelength that is longer than the first wavelength; an optical system for converging an arbitrarily selected one of the light beams on an optical disc that has a surface and at least one information storage layer; a focus control section for controlling the focus position of the light beam with respect to the optical disc; and a defect detecting section, which senses light reflected from the surface of the optical disc with the focus position of the light beam set on the surface, thereby determining, based on the intensity of the reflected light, whether or not there is a fingerprint on the optical disc.
    • 根据本发明的光盘装置包括:用于发射多个光束的激光源,其中波长彼此不同并且包括比第一波长长的第一波长和第二波长; 光学系统,用于将任意选择的一个光束会聚在具有表面的光盘和至少一个信息存储层上; 聚焦控制部分,用于控制光束相对于光盘的聚焦位置; 以及缺陷检测部,其利用设置在表面上的光束的聚焦位置来感测从光盘的表面反射的光,从而基于反射光的强度来确定是否存在指纹 光盘。
    • 147. 发明授权
    • Optical disc device
    • 光盘设备
    • US08098556B2
    • 2012-01-17
    • US12297483
    • 2007-04-20
    • Yuuichi KuzeKatsuya WatanabeShinichi Yamada
    • Yuuichi KuzeKatsuya WatanabeShinichi Yamada
    • G11B15/62G11B17/32G11B20/20G11B27/10G11B20/10
    • G11B7/0945G11B7/0956
    • An object of this invention is to measure the tilt quantity of, and perform a tilt control on, an optical disc accurately without depending on the rotation control method.An optical disc drive includes: a motor for rotating an optical disc; an optical system for irradiating the optical disc with a light beam; a moving mechanism for moving the optical system along the radius of the optical disc; a focus control section for controlling movement of the optical system perpendicularly to the optical disc based on drive values, thereby focusing the light beam onto a storage layer of the optical disc; and a tilt control section for measuring the tilt quantities of the storage layer at multiple different radial locations on the optical disc based on drive values for the respective radial locations when the focus control section focuses the light beam there. When the tilt control section measures the tilt quantities, the motor keeps the rotational frequency of the optical disc constant and the tilt control section uses the drive values obtained at the respective radial locations.
    • 本发明的目的是在不依赖于旋转控制方法的情况下精确地测量光盘的倾斜量并进行倾斜控制。 光盘驱动器包括:用于旋转光盘的马达; 用于用光束照射光盘的光学系统; 用于沿光盘的半径移动光学系统的移动机构; 焦点控制部分,用于基于驱动值来控制光学系统垂直于光盘的移动,从而将光束聚焦到光盘的存储层上; 以及倾斜控制部,用于当聚焦控制部将光束聚焦在那里时,基于各个径向位置的驱动值来测量光盘上的多个不同径向位置处的存储层的倾斜量。 当倾斜控制部分测量倾斜量时,马达保持光盘的旋转频率恒定,并且倾斜控制部分使用在各个径向位置处获得的驱动值。
    • 148. 发明申请
    • METHOD FOR IDENTIFYING GROUP OF MULTILAYER DISC, AND OPTICAL DISC DEVICE
    • 识别多层光盘组和光盘设备的方法
    • US20110292779A1
    • 2011-12-01
    • US13147625
    • 2010-01-28
    • Katsuya WatanabeShinichi Yamamoto
    • Katsuya WatanabeShinichi Yamamoto
    • G11B27/26
    • G11B7/08511G11B2007/0013
    • The present invention provides a method for determining what group a given multilayer optical disc belongs to. The disc is one of a number of multilayer optical discs, which are designed so that information stored is retrievable from any of the discs by irradiating the disc with a light beam having the same wavelength and which have been classified into multiple groups. According to this method, performed first is Step (A) of measuring either a distance from a first one of multiple information layers of the given multilayer optical disc to a second one thereof, which is located adjacent to the first information layer, or a distance from the first information layer to the surface of the optical disc. Next, Step (B) of determining, by the distance measured, what group the given multilayer optical disc belongs to is performed.
    • 本发明提供一种用于确定给定的多层光盘属于哪个组的方法。 盘是多个多层光盘之一,其被设计成使得通过用具有相同波长的光束照射盘并且已经被分类为多组的光盘来从任何光盘检索存储的信息。 根据该方法,首先进行步骤(A),其测量与给定多层光盘的多个信息层中的第一个信息层的距离与位于第一信息层相邻的第二个信息层的距离,或距离 从第一信息层到光盘的表面。 接下来,执行通过所测量的距离来执行给定的多层光盘属于哪个组的步骤(B)。