公开(公告)号：US20050117615A1

公开(公告)日：2005-06-02

申请号：US10169734

申请日：2001-11-16

申请人： Kazuhiko Fujiie ,  Yasuyuki Takeshita

发明人： Kazuhiko Fujiie ,  Yasuyuki Takeshita

IPC分类号： G11B11/105 ,  G11B7/00 ,  G11B7/0045 ,  G11B7/125 ,  H01S5/042 ,  H01S5/062 ,  H01S3/00

CPC分类号： G11B7/126 ,  G11B7/00 ,  H01S5/042 ,  H01S5/062 ,  H01S5/06233

摘要： The present invention proposes a method of controlling the laser power of a semiconductor laser that, in this method of controlling the laser power of a semiconductor laser by applying a power source voltage to between the collector and emitter of an output transistor and a serial circuit of the output transistor and a semiconductor laser, enables decreasing the power consumption of the output transistor. The present invention is arranged to apply a variable power source voltage Vcc to a serial circuit of an output transistor (Qb) and a semiconductor laser (SL) and thereby control the variable power source voltage Vcc such that a difference between the variable power source voltage Vcc and the peak hold voltage of an operating voltage of the semiconductor laser (SL) becomes substantially constant.

摘要翻译： 本发明提出了一种控制半导体激光器的激光功率的方法，在这种通过在输出晶体管的集电极和发射极之间施加电源电压来控制半导体激光器的激光功率的方法以及串联电路 输出晶体管和半导体激光器能够降低输出晶体管的功耗。 本发明被设置为向输出晶体管（Qb）和半导体激光器（SL）的串联电路施加可变电源电压Vcc，从而控制可变电源电压Vcc，使得可变电源电压 Vcc和半导体激光器（SL）的工作电压的峰值保持电压变得基本恒定。

公开(公告)号：US5479387A

公开(公告)日：1995-12-26

申请号：US355429

申请日：1994-12-13

申请人： Nobuhiko Ando ,  Ryo Ando ,  Kazuhiko Fujiie

发明人： Nobuhiko Ando ,  Ryo Ando ,  Kazuhiko Fujiie

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B7/09 ,  G11B7/095 ,  G11B7/13 ,  G11B11/10 ,  G11B11/105 ,  G11B13/04 ,  G11B19/00 ,  G11B19/12

CPC分类号： G11B7/131 ,  G11B11/10597 ,  G11B13/04 ,  G11B19/00 ,  G11B19/12 ,  G11B7/005 ,  G11B7/0903 ,  G11B7/0909 ,  G11B7/0941 ,  G11B7/0943

摘要： An optical recording/reproducing head device which includes a diffraction grating for splitting a light beam radiated from a light source into at least three light beams, an objective lens for converging the three light beams on a signal recording surface of a disc-shaped optical recording medium, driving means for driving the objective lens along a direction parallel to its optical axis and within a plane perpendicular to the optical axis, a beam splitter for splitting the light beam incident via the objective lens, a first photodetector having a light-receiving surface divided by two boundary lines into four sections, second and third photodetectors arrayed in a direction parallel to one of the boundary lines on both sides of the first photodetector and fourth and fifth photodetectors arrayed in a direction perpendicular to the one of the boundary lines on both sides of the first photodetector, a splitting optical element arranged between the photodetectors and the beam splitter for splitting each of the three light beams from the diffraction grating into three more light beams, and a focusing error detection optical element arranged between the photodetectors and the beam splitter, the focusing detection optical element causing changes in the shape of a spot on the light receiving surface of the first photodetector in accordance with displacement of the disc-shaped optical recording medium in a direction perpendicular to the in-plane direction of the disc-shaped optical recording medium.

摘要翻译： 一种光记录/再现头装置，包括用于将从光源辐射的光束分成至少三个光束的衍射光栅，用于将三个光束会聚在盘形光学记录的信号记录表面上的物镜 介质驱动装置，用于沿平行于其光轴的方向并在垂直于光轴的平面内驱动物镜;分束器，用于分离通过物镜入射的光束;第一光电检测器，具有光接收表面 将两条边界线划分为四个部分，第二和第三光电探测器沿平行于第一光电检测器两侧边界线之一的方向排列，第四和第五光电检测器沿垂直于两条边界线之一的方向排列 第一光电检测器的侧面，布置在光电检测器和分束器之间的分束光学元件 将来自衍射光栅的三个光束中的每一个光束分成三个光束，以及布置在光电检测器和分束器之间的聚焦误差检测光学元件，聚焦检测光学元件引起光接收点上的光斑形状的变化 第一光电检测器的表面根据盘状光记录介质在垂直于盘形光记录介质的面内方向的方向上的位移。

公开(公告)号：US5003521A

公开(公告)日：1991-03-26

申请号：US243036

申请日：1988-08-18

申请人： Tadao Yoshida ,  Kazuhiko Fujiie ,  Ryo Ando

发明人： Tadao Yoshida ,  Kazuhiko Fujiie ,  Ryo Ando

IPC分类号： G11B11/10 ,  G11B7/00 ,  G11B7/004 ,  G11B7/09 ,  G11B11/105 ,  G11B19/02 ,  G11B19/12

CPC分类号： G11B7/0941 ,  G11B19/02 ,  G11B19/12 ,  G11B2020/10879 ,  G11B2220/2525 ,  G11B2220/2537

摘要： An objective lens (3) of an optical pick up head (10) is moved in a direction of the optical axis, and a signal level of the output detected by the optical pick up head (10) before and after a focussed state is compared with predetermined reference levels (Vref.sub.1) and (Vref.sub.2) level comparators (32) and (33), In order to discriminate the reproduction-only disk from the recording disk by utilizing a difference in the reflection factor on the recording surface on the optical disk (20). Operation of the optical disk recording/reproducing apparatus is automatically switched over depending upon the kind of the optical disk.

公开(公告)号：US4932016A

公开(公告)日：1990-06-05

申请号：US206857

申请日：1988-06-02

申请人： Tadao Yoshida ,  Kazuhiko Fujiie ,  Ryo Ando

发明人： Tadao Yoshida ,  Kazuhiko Fujiie ,  Ryo Ando

IPC分类号： G11B27/00 ,  G11B19/04 ,  G11B20/10 ,  G11B27/034 ,  G11B27/036 ,  G11B27/10 ,  G11B27/11 ,  G11B27/19 ,  G11B27/22 ,  G11B27/24 ,  G11B27/30 ,  G11B27/32 ,  G11B27/34

CPC分类号： G11B27/24 ,  G11B19/04 ,  G11B20/10527 ,  G11B27/036 ,  G11B27/105 ,  G11B27/11 ,  G11B27/22 ,  G11B27/3063 ,  G11B27/329 ,  G11B27/34 ,  G11B2220/216 ,  G11B2220/2525 ,  G11B2220/2545 ,  G11B2220/65 ,  G11B27/034 ,  G11B27/3027

摘要： Apparatus and method of recording and reproducing data using a disk to record musical performance data. Data related to the music and start times for each piece of music are recorded onto a table of contents section of the disk and the operation is controlled according to this data. Therefore, wasteful reproduction operation is avoided when there exists non-recorded areas between pieces of music or when a piece of music shorter than the initial piece of music is recorded overlapped thereon, enabling the music to be favorably reproduced. In carrying out the (sound) recording operation, furthermore, the non-recorded areas can quickly be found.

公开(公告)号：US08149661B2

公开(公告)日：2012-04-03

申请号：US12734735

申请日：2009-09-16

申请人： Tsutomu Ishimoto ,  Kazuhiko Fujiie

发明人： Tsutomu Ishimoto ,  Kazuhiko Fujiie

IPC分类号： G11B20/10

CPC分类号： H01S5/06216 ,  B82Y10/00 ,  G11B7/00736 ,  G11B7/127 ,  G11B7/1275 ,  G11B7/247 ,  G11B7/248 ,  G11B2007/24606 ,  H01S5/06835

摘要： Directed to freely adjusting an emission period of a semiconductor laser.In the present invention, pulsed light serving as pulse-shaped laser light (LL) is emitted from a semiconductor laser (3), and a laser drive voltage (DJ) that is generated on the basis of a pulse signal (SL) and that has pulse-shaped drive voltage pulses (DJw) is applied to the semiconductor laser (3). At this time, a short-pulse light source (51) varies a voltage period (TV) corresponding to an interval between the drive voltage pulses (DJw), thereby varying a set period (TS) corresponding to an interval between generated signal pulses (SLw) in the pulse signal (SL).

摘要翻译： 用于自由调节半导体激光器的发射周期。 在本发明中，从半导体激光器（3）和基于脉冲信号（SL）生成的激光驱动电压（DJ）发射用作脉冲激光（LL）的脉冲光，并且基于脉冲信号（SL）产生的激光驱动电压（DJ） 脉冲驱动电压脉冲（DJw）被施加到半导体激光器（3）。 此时，短脉冲光源（51）改变与驱动电压脉冲（DJw）之间的间隔对应的电压周期（TV），从而改变对应于所生成的信号脉冲之间的间隔的设定周期（TS） SLw）在脉冲信号（SL）中。

公开(公告)号：US06944100B2

公开(公告)日：2005-09-13

申请号：US10384710

申请日：2003-03-11

申请人： Tetsuhiro Sakamoto ,  Yasuhito Tanaka ,  Kazuhiko Fujiie

发明人： Tetsuhiro Sakamoto ,  Yasuhito Tanaka ,  Kazuhiko Fujiie

IPC分类号： G11B20/10 ,  G11B7/004 ,  G11B7/007 ,  G11B11/105 ,  G11B20/12 ,  G11B20/18 ,  G11B11/00

CPC分类号： G11B20/1217 ,  G11B11/10508 ,  G11B11/10515 ,  G11B11/10528 ,  G11B11/10595 ,  G11B20/1833 ,  G11B20/1866 ,  G11B2020/1275 ,  G11B2220/2525

摘要： A magneto-optical recording/reproducing method is disclosed which causes a laser beam to be emitted to a disc recording medium having information recorded thereon earlier by magnetic field modulation, the laser beam causing the disc recording medium to develop a temperature distribution such as to generate a driving force for moving a domain wall of a magnetic domain in the medium so that the magnetic domain smaller in diameter than a spot of the laser beam is expanded sufficiently to let information recorded in the domain be detected. The method comprises the steps of: recording information to the disc recording medium while rotating the medium in a first rotating direction; and reproducing the information that was recorded to the disc recording medium in the recording step while rotating the medium in a second rotating direction reverse to the first rotating direction.

摘要翻译： 公开了一种磁光记录/再现方法，其使得激光束通过磁场调制早日发射到具有记录信息的盘记录介质，激光束使盘记录介质产生温度分布，从而产生 用于移动介质中的磁畴的畴壁的驱动力，使得直径比激光束的点小的磁畴被充分扩大，以便检测记录在该域中的信息。 该方法包括以下步骤：在沿第一旋转方向旋转介质的同时将信息记录到盘记录介质; 并且在与第一旋转方向相反的第二旋转方向上旋转介质的同时，在记录步骤中再现记录到盘记录介质的信息。

公开(公告)号：US20050099908A1

公开(公告)日：2005-05-12

申请号：US10950385

申请日：2004-09-28

申请人： Goro Fujita ,  Kazuhiko Fujiie ,  Yasuhito Tanaka ,  Kimihiro Saito ,  Tetsuhiro Sakamoto ,  Takeshi Miki

发明人： Goro Fujita ,  Kazuhiko Fujiie ,  Yasuhito Tanaka ,  Kimihiro Saito ,  Tetsuhiro Sakamoto ,  Takeshi Miki

IPC分类号： G11B7/24 ,  G11B5/09 ,  G11B7/00 ,  G11B7/005 ,  G11B7/007 ,  G11B27/24

CPC分类号： G11B27/24 ,  G11B7/0053 ,  G11B7/00718

摘要： The present invention provides an optical disk drive and optical disk playback method, with an improved capability of reading address information from an optical disk having address information recorded thereon by wobbling one of side walls of a recording track, with a wider tilt margin.

摘要翻译： 本发明提供了一种光盘驱动器和光盘播放方法，其具有通过以更宽的倾斜余量摆动记录轨道的一个侧壁而从其上记录有地址信息的光盘读取地址信息的能力。

公开(公告)号：US06741526B1

公开(公告)日：2004-05-25

申请号：US09507848

申请日：2000-02-22

申请人： Kazuhiko Fujiie ,  Naohiro Netsu ,  Tomohiro Koda

发明人： Kazuhiko Fujiie ,  Naohiro Netsu ,  Tomohiro Koda

IPC分类号： G11B1100

CPC分类号： G11B11/1058 ,  G11B5/105 ,  G11B5/1278 ,  G11B11/10534 ,  G11B11/10558

摘要： A magnetic head device comprising a head section 55 for applying a magnetic field to a disk. The head section 55 includes a magnetic field generating section 61 and a slider 62. The slider 62 supports the magnetic field generating section 61 and may be set in sliding contact with the disk. The magnetic field generating section 61 has a magnetic core 63 and a coil 64 wound around the magnetic core 63. The section 61 is designed to generate the magnetic field and embedded in and formed integral with the slider 62. The head section 55 excels in heat-radiating property.

摘要翻译： 一种磁头装置，包括用于向磁盘施加磁场的磁头部分55。 头部55包括磁场产生部分61和滑块62.滑块62支撑磁场产生部分61，并且可以设置成与盘滑动接触。 磁场产生部分61具有磁芯63和卷绕在磁芯63周围的线圈64.部分61被设计成产生磁场并嵌入并与滑块62一体形成。头部55在热 辐射属性。

公开(公告)号：US06392977B2

公开(公告)日：2002-05-21

申请号：US09445695

申请日：1999-12-13

申请人： Nobuhiko Ando ,  Kazuhiko Fujiie

发明人： Nobuhiko Ando ,  Kazuhiko Fujiie

IPC分类号： G11B700

CPC分类号： G11B7/1353 ,  G11B7/131 ,  G11B7/1356 ,  G11B7/1365 ,  G11B7/139 ,  G11B7/13922 ,  G11B11/10543 ,  G11B11/10597 ,  G11B2007/0006 ,  G11B2007/13727

摘要： An optical pickup device that is able to record/reproduce information signals for first and second optical discs with different recording capacities. The optical pickup device includes an objective lens for converging first and second light beams of different wavelengths on the signal recording layers of first and second optical discs having different substrate thicknesses, a beam splitter having the same transmittance to the first and second light beams and configured for separating the first and second light beams radiated by first and second light sources to fall on the beam splitter via a first objective lens or a second objective lens, and a hologram element arranged between the objective lens and the beam splitter for limiting the aperture of one of the first light beam and the second light beam and for correcting the spherical aberration caused by difference in the disc substrate thickness of the first and second optical discs. This configuration enables various optical elements, such as objective lens or beam splitter, to be used in common for the optical disc of different recording capacities.

摘要翻译： 一种能够记录/再现具有不同记录容量的第一和第二光盘的信息信号的光学拾取装置。 该光学拾取装置包括用于在具有不同衬底厚度的第一和第二光盘的信号记录层上会聚不同波长的第一和第二光束的物镜，对第一和第二光束具有相同透射率的分束器， 用于分离由第一和第二光源辐射的第一和第二光束经由第一物镜或第二物镜落在分束器上，以及布置在物镜和分束器之间的全息元件，用于限制 第一光束和第二光束中的一个，并且用于校正由第一和第二光盘的盘基板厚度的差异引起的球面像差。 该配置使得能够将各种光学元件（例如物镜或分束器）共同用于不同记录容量的光盘。

公开(公告)号：US5453607A

公开(公告)日：1995-09-26

申请号：US253669

申请日：1994-06-03

申请人： Nobuhiko Ando ,  Ryo Ando ,  Kazuhiko Fujiie

发明人： Nobuhiko Ando ,  Ryo Ando ,  Kazuhiko Fujiie

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B7/09 ,  G11B7/095 ,  G11B7/13 ,  G11B11/10 ,  G11B11/105 ,  G11B13/04 ,  G11B19/00 ,  G11B19/12 ,  G01J1/20

CPC分类号： G11B7/131 ,  G11B11/10597 ,  G11B13/04 ,  G11B19/00 ,  G11B19/12 ,  G11B7/005 ,  G11B7/0903 ,  G11B7/0909 ,  G11B7/0941 ,  G11B7/0943

摘要： A recording and/or reproducing apparatus for a disc-shaped optical recording medium includes a rotation drive mechanism, a head device, a discriminating device, a first processing device, a second processing device, a third processing device and a controller. A disc-shaped optical recording medium is loaded on the rotation drive mechanism and is run in rotation at a constant linear velocity. The head device includes a laser light source and a photodetector unit and is movable in the radial direction of the disc-shaped optical recording medium for recording/reproducing information signal on or from the disc-shaped optical recording medium. The discriminating device discriminates the type of the disc-shaped optical recording medium loaded on the rotation driving device. The photodetector unit includes first, second and third photodetectors. The first processing circuit takes a difference between output signals from the first photodetector and those from the second photodetector. The second processing circuit takes a sum of output signals from the first photodetector and those from the second photodetector. The third photodetector generates an error signal based on an output signal from the third photodetector. The controller selectively changes over an output from the first processing circuit to an output from the second processing circuit and vice versa based on a detection output from the discriminating device to produce reproducing signals.

摘要翻译： 用于盘形光记录介质的记录和/或再现装置包括旋转驱动机构，头装置，识别装置，第一处理装置，第二处理装置，第三处理装置和控制器。 盘形光记录介质装载在旋转驱动机构上，并以恒定的线速度旋转运动。 头装置包括激光光源和光电检测器单元，并且可在盘形光记录介质的径向方向上移动，用于在盘形光记录介质上记录/再现信息信号。 鉴别装置鉴别装在旋转驱动装置上的盘形光学记录介质的类型。 光检测器单元包括第一，第二和第三光电检测器。 第一处理电路从第一光电检测器的输出信号和来自第二光电检测器的输出信号之间取差。 第二处理电路从第一光电检测器和来自第二光电检测器的输出信号的和。 第三光电检测器基于来自第三光电检测器的输出信号产生误差信号。 控制器基于来自识别装置的检测输出，选择性地将来自第一处理电路的输出切换到来自第二处理电路的输出，反之亦然，以产生再现信号。