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110 条记录 (耗时 0.044 秒)

    DRIVE CONTROL APPARATUS AND DRIVE CONTROL METHOD OF SEMICONDUCTOR LASER
    11.
    发明申请
    DRIVE CONTROL APPARATUS AND DRIVE CONTROL METHOD OF SEMICONDUCTOR LASER 审中-公开
    驱动控制装置和半导体激光器的驱动控制方法

    公开(公告)号：US20090141760A1

    公开(公告)日：2009-06-04

    申请号：US12260824

    申请日：2008-10-29

    申请人： Masahiro Saito ,  Takashi Usui ,  Kazuo Watabe ,  Keiichiro Yusu ,  Chosaku Noda ,  Nobuaki Kaji ,  Kazuto Kuroda

    发明人： Masahiro Saito ,  Takashi Usui ,  Kazuo Watabe ,  Keiichiro Yusu ,  Chosaku Noda ,  Nobuaki Kaji ,  Kazuto Kuroda

    IPC分类号： H01S3/00

    CPC分类号： G11B7/1263

    摘要： According to one embodiment, a drive control apparatus of a semiconductor laser includes a driving circuit which drives the semiconductor laser by applying pulses transiting from bias current to peak current to the semiconductor laser as laser driving current that causes relaxation oscillation of emission light intensity of the semiconductor laser, and a control circuit which controls the bias current such that the bias current has a predetermined ratio limiting fluctuation of a leading peak value of the relaxation oscillation occurring for each application of pulses relative to threshold current of the semiconductor laser. The control circuit changes the bias current to maintain the predetermined ratio relative to fluctuation of the threshold current.

    摘要翻译： 根据一个实施例，半导体激光器的驱动控制装置包括驱动电路，该驱动电路通过施加从偏置电流流向峰值电流的脉冲来驱动半导体激光器作为激光驱动电流，该激光驱动电流引起半导体激光器的发射光强度的弛豫振荡 半导体激光器和控制偏置电流的控制电路，使得偏置电流相对于半导体激光器的阈值电流具有针对每次施加脉冲而产生的弛豫振荡的引导峰值的预定比例限制波动。 控制电路改变偏置电流以相对于阈值电流的波动保持预定的比率。

    OPTICAL DISC APPARATUS AND OPTICAL DISC PROCESSING METHOD
    13.
    发明申请
    OPTICAL DISC APPARATUS AND OPTICAL DISC PROCESSING METHOD 审中-公开
    光盘设备和光盘处理方法

    公开(公告)号：US20090109816A1

    公开(公告)日：2009-04-30

    申请号：US12256365

    申请日：2008-10-22

    申请人： Takashi Usui ,  Kazuo Watabe ,  Keiichiro Yusu ,  Chosaku Noda ,  Kazuto Kuroda ,  Nobuaki Kaji ,  Masahiro Saito

    发明人： Takashi Usui ,  Kazuo Watabe ,  Keiichiro Yusu ,  Chosaku Noda ,  Kazuto Kuroda ,  Nobuaki Kaji ,  Masahiro Saito

    IPC分类号： G11B7/00

    CPC分类号： G11B7/00456 ,  G11B7/1267

    摘要： According to one embodiment, a calibration section controls an LD driving section so as to carry out test writing on a recording layer of an optical disc using a light pulse having relaxation oscillation, irradiates the test-written area with a reproduction laser beam so as to detect reflected light, and determine write strategy based on the detected result. A recording process is executed on the optical disc by using the light pulse having relaxation oscillation based on the write strategy determined by the calibration section.

    摘要翻译： 根据一个实施例，校准部分控制LD驱动部分，以便使用具有弛豫振荡的光脉冲对光盘的记录层进行测试写入，用再现激光束照射测试写入区域，以便 检测反射光，并根据检测结果确定写入策略。 通过使用基于由校准部确定的写入策略的具有弛豫振荡的光脉冲在光盘上执行记录处理。

    INFORMATION REPRODUCTION APPARATUS AND METHOD FOR CONTROLLING SAME
    16.
    发明申请
    INFORMATION REPRODUCTION APPARATUS AND METHOD FOR CONTROLLING SAME 审中-公开
    信息再现装置及其控制方法

    公开(公告)号：US20120008476A1

    公开(公告)日：2012-01-12

    申请号：US13238612

    申请日：2011-09-21

    申请人： Kazuto Kuroda ,  Kazuo Watabe ,  Hideaki Okano ,  Akihito Ogawa ,  Takashi Usui

    发明人： Kazuto Kuroda ,  Kazuo Watabe ,  Hideaki Okano ,  Akihito Ogawa ,  Takashi Usui

    IPC分类号： G11B7/135

    CPC分类号： G11B7/083 ,  G11B7/08564 ,  G11B7/09 ,  G11B7/127

    摘要： According to one embodiment, an information reproduction apparatus includes an information acquisition unit, an error detection unit, and a control unit. The information acquisition unit is configured to irradiate a reference beam, convert the reference beam into a luminance signal, and output the luminance signal when reproducing an information recording Medium. The error detection unit is configured to detect at least one selected from a first error and a second error by extracting a feature extraction quantity from the luminance signal. The first error is of an irradiation angle of the reference beam. The second error is of at least one selected from a temperature and a wavelength of the reference beam. The control unit is configured to control at least one selected from the irradiation angle and the at least one selected from the reproduction temperature and the wavelength of the reference beam using the second error.

    摘要翻译： 根据一个实施例，信息再现设备包括信息获取单元，错误检测单元和控制单元。 信息获取单元被配置为照射参考光束，将参考光束转换成亮度信号，并且在再现信息记录介质时输出亮度信号。 误差检测单元被配置为通过从亮度信号提取特征提取量来检测从第一误差和第二误差中选出的至少一个。 第一误差是参考光束的照射角度。 第二误差是从参考光束的温度和波长中选出的至少一个。 控制单元被配置为使用第二误差来控制从照射角度和从再现温度和参考光束的波长中选择的至少一个中选择的至少一个。

    INFORMATION RECORDING MEDIUM AND OPTICAL DISC APPARATUS
    19.
    发明申请
    INFORMATION RECORDING MEDIUM AND OPTICAL DISC APPARATUS 审中-公开
    信息记录媒体和光盘设备

    公开(公告)号：US20070058516A1

    公开(公告)日：2007-03-15

    申请号：US11469608

    申请日：2006-09-01

    申请人： Kazuo Watabe ,  Yasuaki Ootera ,  Nobuhisa Yoshida ,  Naomasa Nakamura

    发明人： Kazuo Watabe ,  Yasuaki Ootera ,  Nobuhisa Yoshida ,  Naomasa Nakamura

    IPC分类号： G11B7/00 ,  G11B3/70

    CPC分类号： G11B7/24038

    摘要： An embodiment of the invention, an information recording medium has a first recording layer, a second recording layer which is provided with respect to the first recording layer through a first space layer with a first thickness, a third recording layer which is provided with respect to the second recording layer through a second space layer whose thickness is different from the first space layer and is set to a predetermined magnitude with respect to the thickness of the first space layer, a first substrate which supports the first recording layer, and a second substrate which supports the third recording layer, and it is possible to manufacture with high productivity an information recording medium having three or more recording layers hard to cause interlayer crosstalk.

    摘要翻译： 本发明的实施例中，信息记录介质具有第一记录层，通过具有第一厚度的第一空间层相对于第一记录层设置的第二记录层，相对于第一记录层设置的第三记录层 所述第二记录层通过第二空间层，所述第二空间层的厚度与所述第一空间层不同，并且相对于所述第一空间层的厚度被设定为预定的大小;第一基板，其支撑所述第一记录层;以及第二基板 其支持第三记录层，并且可以以高生产率制造具有三层或更多层难以引起层间串扰的记录层的信息记录介质。