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    • 2. 发明授权
    • Optical information recording medium, method for manufacturing the same, and initialization device
    • 光信息记录介质,其制造方法和初始化装置
    • US07463575B2
    • 2008-12-09
    • US11463977
    • 2006-08-11
    • Tetsuya AkiyamaNaoyasu MiyagawaKenichi NishiuchiTakashi Nishihara
    • Tetsuya AkiyamaNaoyasu MiyagawaKenichi NishiuchiTakashi Nishihara
    • G11B7/26
    • G11B7/1369G11B7/1275G11B7/13925G11B7/14G11B7/24038G11B7/268G11B2007/0013
    • An optical information recording medium includes a plurality of recording layers, a reflectance of at least one of the plurality of the recording layers in a non-initialized state with respect to a light beam for initialization being smaller than a reflectance of the same in an initialized state with respect to the light beam for initialization. The recording layers are initialized by irradiating, among the plurality of recording layers, the recording layer positioned farther from a light beam irradiation side with the light beam prior to irradiating the recording layer positioned closer to the light beam irradiation side, so that the initialized recording layers have no initialization irregularities. In initialization, at a position at a same distance in a radial direction on the optical information recording medium, the recording layer positioned farther from a light beam irradiation side is irradiated with one light beam before the recording layer positioned closer to the light beam irradiation side is irradiated with another light beam so that the plurality of recording layers are initialized at the same time by a light beam projecting operation in which the light beams are focused at different positions. This ensures the initialization without irregularities within a short time.
    • 光学信息记录介质包括多个记录层,相对于初始化用光束,非初始化状态的多个记录层中的至少一个记录层的反射率小于初始化的光束的反射率 相对于光束进行初始化的状态。 通过在照射位于更靠近光束照射侧的记录层之前,在多个记录层之间照射位于离光束照射侧更远离光束的记录层,以便初始记录 层没有初始化不规则。 在初始化中,在光学信息记录介质上沿径向相同距离的位置,在距离光束照射侧更靠近的记录层之前,用离开光束照射侧的记录层照射一个光束 用另一光束照射,使得多个记录层通过其中光束聚焦在不同位置的光束投影操作同时被初始化。 这确保了在短时间内没有不规则的初始化。
    • 6. 发明授权
    • Optical recording medium with address information composed of pits
    • 具有由凹坑组成的地址信息的光记录介质
    • US07088668B1
    • 2006-08-08
    • US10089402
    • 2000-07-13
    • Tetsuya AkiyamaKenichi NishiuchiShigeaki FurukawaTomoyoshi MiyakeMasahiko Tsukuda
    • Tetsuya AkiyamaKenichi NishiuchiShigeaki FurukawaTomoyoshi MiyakeMasahiko Tsukuda
    • G11B7/00
    • G11B20/10G11B7/005G11B7/0053G11B7/00718G11B7/00745G11B7/24085
    • The width W of the address pit (9) of an optical recording medium of intermediate address type is determined by W=k Tp/(λ/NA) where λ is the laser wavelength of the optical head of the optical disk device use, NA is the numerical aperture of the objective, Tp is the track pitch of the record medium, and k is 0.40≦k≦0.68. Alternatively, an optical device comprises a first address demodulating circuit for demodulating address information by using a signal that is the sum of the electric signals outputted from a pair of photodetectors separated in the direction of the track and a second address demodulating circuit for demodulating address information by suing a signal that is the difference between the electric signals. The address is detected base on the information thus obtained. In such a way, the compatibility of the recording medium used and that of the optical device are improved, the reproduction margin in demodulating the address information is increased, realizing high accuracy address detection when reproducing data from an optical recorded medium of intermediate address type.
    • 中间地址类型的光记录介质的地址凹坑(9)的宽度W由W = k Tp /(λ/ NA)确定,其中λ是光盘装置的光头的激光波长,NA 是物镜的数值孔径,Tp是记录介质的轨道间距,k是0.40 <= k <= 0.68。 或者,光学装置包括:第一地址解调电路,用于通过使用从在轨道方向上分离的一对光电检测器输出的电信号的和的信号和用于解调地址信息的第二地址解调电路来解调地址信息 通过起诉作为电信号之间的差异的信号。 根据获得的信息检测地址。 以这种方式,改善了所使用的记录介质和光学装置的兼容性,提高了解调地址信息的再现余量,在从中间地址类型的光学记录介质再现数据时实现了高精度的地址检测。
    • 10. 发明授权
    • Optical information recording medium, and method and apparatus for recording/reproducing information thereon
    • 光信息记录介质,以及用于在其上记录/再现信息的方法和装置
    • US06754143B2
    • 2004-06-22
    • US09812533
    • 2001-03-20
    • Tetsuya AkiyamaKenichi NishiuchiKenji Narumi
    • Tetsuya AkiyamaKenichi NishiuchiKenji Narumi
    • G11B700
    • G11B27/24G11B7/007G11B7/00718G11B7/00745G11B27/3027G11B2220/216G11B2220/218G11B2220/2529G11B2220/2545G11B2220/2575
    • The present invention relates to an optical information recording medium including a disk-shaped transparent substrate and a recording layer for recording, reproducing or erasing information by irradiation of laser light, the recording layer being formed over the substrate. The recording layer of the present invention includes information tracks including groove tracks and land tracks that are formed alternately in a radial direction of the disk. The information tracks comprise information recording regions and address regions interposed between the information recording regions, the information recording regions and the address regions being arranged along the tracking direction of the laser light. In the information recording regions, every second step in the radial direction of steps for dividing the groove tracks from the land tracks adjacent to the groove tracks is wobbled in the tracking direction, and in a range whose ends are defined by the address regions the every second step is wobbled at a constant frequency. Prepit addresses for providing information on a position on the recording medium are formed on the address regions. Moreover, the present invention provides an optical information recording medium including n recording layers (where n is an integer of at least 2), and in at least the first recording layer to the (n−1)th recording layer from the transparent substrate side, no pair of adjacent address regions in the radial direction of the disk are arranged so as to be aligned on a straight line passing through the center of the disk.
    • 本发明涉及一种光信息记录介质,其包括盘形透明基板和用于通过照射激光来记录,再现或擦除信息的记录层,所述记录层形成在所述基板上。 本发明的记录层包括在盘的径向方向上交替形成的沟槽轨道和槽脊轨道的信息轨迹。 信息轨道包括介于信息记录区域之间的信息记录区域和地址区域,沿着激光的跟踪方向布置信息记录区域和地址区域。 在信息记录区域中,沿跟踪方向摆动凹槽轨道与槽纹轨道相邻的台阶轨迹的径向方向上的每个第二步骤,并且在其端部由地址区域限定的范围内,每个 第二步以恒定频率摆动。 在地址区域上形成用于提供关于记录介质上的位置的信息的地址。 此外,本发明提供一种包括n个记录层(其中n是至少为2的整数)的光学信息记录介质,并且至少在从第一第一记录层到第(n-1)个记录层的透明基板侧 在圆盘的径向上没有一对相邻的地址区域被布置成在通过盘的中心的直线上对齐。