公开(公告)号：US5383174A

公开(公告)日：1995-01-17

申请号：US998736

申请日：1992-12-30

申请人： Tomiyuki Numata ,  Takeshi Yamaguchi ,  Takashi Iwaki

发明人： Tomiyuki Numata ,  Takeshi Yamaguchi ,  Takashi Iwaki

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0055 ,  G11B7/09 ,  G11B7/095

CPC分类号： G11B7/0901 ,  G11B7/004 ,  G11B7/0925

摘要： An optical disk apparatus has a galvanic mirror error signal generation circuit for detecting that the galvanic mirror rotates more than an allowed limit value in directions P and Q. When it is detected by the galvanic mirror error signal generation circuit that the galvanic mirror rotates more than the allowed limit value, the light intensity of the light spot is changed from the recording-use (or erasing-use) light intensity into the reproducing-use light intensity. Accordingly, recording and erasing of information is always carried out by the projection of the light beam having a predetermined light intensity, thereby always providing a high grade of optical disk apparatus.

摘要翻译： 光盘装置具有电流反射镜误差信号发生电路，用于检测电流反射镜的旋转量是否大于允许的方向P和Q的极限值。当电流反射镜误差信号发生电路检测到电流反射镜旋转时， 允许的极限值，光斑的光强度从记录用（或擦除用）光强度改变为再现用光强度。 因此，信息的记录和擦除总是通过具有预定光强度的光束的投影进行，从而始终提供高等级的光盘装置。

公开(公告)号：US5010540A

公开(公告)日：1991-04-23

申请号：US225892

申请日：1988-07-29

申请人： Hiroshi Fuji ,  Tsuneo Fujiwara ,  Takashi Iwaki ,  Tomiyuki Numata ,  Kentaroh Tsuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

发明人： Hiroshi Fuji ,  Tsuneo Fujiwara ,  Takashi Iwaki ,  Tomiyuki Numata ,  Kentaroh Tsuji ,  Shigemi Maeda ,  Takeshi Yamaguchi ,  Kunio Kojima ,  Toshihisa Deguchi ,  Shigeo Terashima

IPC分类号： G11B19/247

CPC分类号： G11B19/247

摘要： An apparatus for recording and reproducing information on and from an optical disk includes a first control for producing a first control signal for controlling the rotational speed of a rotational driving apparatus, on the basis of the detected radial position; a judging apparatus which judges whether or not the reproduced signals are reproduced from a recorded region of the optical disk; a second control for producing a second control signal for controlling the rotational speed of the rotational driving apparatus, on the basis of the signals reproduced from the disk; and a switch apparatus which switches the circuit so that the rotational driving apparatus is controlled by the first control signal when the reproduced signals are not reproduced from a non-recorded region, and controlled by the second control signal when the reproduced signals are reproduced from a recorded region.

公开(公告)号：US5008888A

公开(公告)日：1991-04-16

申请号：US384213

申请日：1989-07-21

申请人： Tomiyuki Numata ,  Takashi Iwaki ,  Kunio Kojima ,  Toshihisa DeGuchi

发明人： Tomiyuki Numata ,  Takashi Iwaki ,  Kunio Kojima ,  Toshihisa DeGuchi

IPC分类号： G11B11/10 ,  G11B7/125 ,  G11B11/105 ,  H01S5/06 ,  H01S5/062 ,  H01S5/0683

CPC分类号： G11B7/126 ,  H01S5/06209 ,  H01S5/0617 ,  H01S5/0683

摘要： A semiconductor laser driving apparatus for supplying a driving current to a semiconductor laser device of an optical disk recording and reproducing system, the level of which is changed to adjust the optical output of the laser device to one of plural levels corresponding to positions of an optical disk which is irradiated by a laser beam emitted from the laser device. The apparatus comprises: a current source for sequentially supplying plural reference driving currents having a different predetermined level to the laser device; a monitor for detecting the optical output level of the laser device when each of the reference driving currents is supplied to the laser device; a setting device for setting several optimum values on the basis of the detected optical output levels; a selecting device for selecting one of the several optimum values, depending upon the position of an optical disk where is to be irradiated by a laser beam; and said current source for supplying a driving current for recording information on an optical disk, to the laser device, the level of the driving current corresponding to the selected optimum value.

公开(公告)号：US5101386A

公开(公告)日：1992-03-31

申请号：US382233

申请日：1989-07-19

申请人： Kunio Kojima ,  Masaru Nomura ,  Tomiyuki Numata ,  Takashi Iwaki

发明人： Kunio Kojima ,  Masaru Nomura ,  Tomiyuki Numata ,  Takashi Iwaki

IPC分类号： G11B7/085

CPC分类号： G11B7/08517

摘要： A track jumping apparatus for an optical disk pickup which can detect a tracking error signal in performing a track jump, and determine a time of acceleration or deceleration of a jump signal by comparing the tracking error signal with a reference level, the track jumping apparatus comprising storing device for storing of standard values corresponding to the kinds of track jumps, standard value selecting device for selecting a standard value corresponding to a kind of track jump in performing the track jump, reference level setting device for setting a reference level so that the ratio of the reference level to a peak value of the tracking error signal agrees with a value based on the standard value selected by the standard value selecting device in performing the track jump, and standard value amending device for amending the standard value in the storing device selected at that moment according to a state of the tracking error signal at the end of the track jump.

公开(公告)号：US06967917B1

公开(公告)日：2005-11-22

申请号：US09561856

申请日：2000-04-28

申请人： Tomiyuki Numata ,  Shigemi Maeda

发明人： Tomiyuki Numata ,  Shigemi Maeda

IPC分类号： G11B7/007 ,  G11B20/12 ,  G11B20/18 ,  G11B5/58

CPC分类号： G11B20/1883 ,  G11B7/007 ,  G11B2220/20

摘要： An optical disk using both grooves and lands as a recording track is provided with {circle around (1)} a data area for recording/reproducing data and {circle around (2)} DMAs (Data Management Areas) for managing a defective sector in the data area. The DMAs include four DMAs A–D all formed on the lands. The DMA B(D) is formed behind the ending sector of the DMA A(C). This arrangement realizes a DMA format having high resistance to defects and improving a processing rate. Consequently, highly reliable optical disk and optical disk apparatus can be provided.

摘要翻译： 使用凹槽和平台作为记录轨道的光盘设置有{围绕（1个用于记录/再现数据的数据区域和周围的圆圈（用于管理数据区域中的缺陷扇区的2个DMA（数据管理区域））。 DMA包括四个形成在地面上的DMA AD，DMA B（D）形成在DMA A（C）的结尾扇区之后，这样可以实现具有高抗缺陷性和提高处理速率的DMA格式。 可以提供高度可靠的光盘和光盘装置。

公开(公告)号：US5729517A

公开(公告)日：1998-03-17

申请号：US740308

申请日：1996-10-28

申请人： Tsuneo Fujiwara ,  Tomiyuki Numata

发明人： Tsuneo Fujiwara ,  Tomiyuki Numata

IPC分类号： G11B20/10 ,  H04N5/76

CPC分类号： G11B20/10101 ,  G11B20/10009 ,  G11B20/10111

摘要： A clock extracting section generates a first clock synchronized with a reproducing signal, and a second clock with a frequency twice a frequency of the first clock. An AD converter quantizes the reproducing signal at timing of the second clock. A data classifier classifies the quantized data into two quantized data streams with a period of the first clock. Each equalizer equalizes the two quantized data streams to (1,1) and (1,2,1) partial response characteristics. Each branch metric arithmetic unit calculates a corresponding branch metric respectively. A synthesizer calculates a sum of them so as to generate a synthetic branch metric. An ACS circuit and a data decoding section Viterbi-decode data according to the synthetic branch metric. As a result, even if an SN ratio is lowered by increase in interference between codes and a noises at the time of recording at high density, an error of decoded data can be decreased.

摘要翻译： 时钟提取部分产生与再现信号同步的第一时钟和频率是第一时钟频率的两倍的第二时钟。 AD转换器在第二时钟的定时量化再现信号。 数据分类器将量化的数据分成具有第一时钟的周期的两个量化数据流。 每个均衡器将两个量化数据流均衡为（1,1）和（1,2,1）部分响应特性。 每个分支度量运算单元分别计算相应的分支度量。 合成器计算它们的和以便产生合成分支度量。 ACS电路和数据解码部分根据合成分支度量维特比解码数据。 结果，即使通过增加代码之间的干扰和在高密度记录时的噪声来降低SN比，可以减少解码数据的误差。

公开(公告)号：US5831953A

公开(公告)日：1998-11-03

申请号：US754534

申请日：1996-11-21

申请人： Tomiyuki Numata

发明人： Tomiyuki Numata

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/085 ,  G11B7/09 ,  G11B7/125 ,  G11B19/12

CPC分类号： G11B7/0945 ,  G11B19/12 ,  G11B7/0908 ,  G11B7/0941 ,  G11B2007/0006

摘要： An optical disk device of a simple structure using an optical pickup alone as read mechanism for detecting a thickness of the substrate of an optical disk. The optical disk device (1) carries out the focus search by moving the focal point of a laser beam emitted through an objective lens in a direction along the thickness of the optical disk in a region covering both the substrate surface and the recording layer, (2) converts S-shaped wave forms produced in a focus error signal FES from a two-piece photo-diode when the focal point passes through the substrate surface and recording layer, respectively into a digital signal CP.sub.out, and (3) detects a pulse interval of the digital signal CP.sub.out, by means of an MPU. Since the MPU detects the number of pulses of the digital signal CP.sub.out, the optical disk device can also detect the number of the recording layers.

摘要翻译： 一种简单结构的光盘装置，其使用单独的光学拾取器作为用于检测光盘的基板的厚度的读取机构。 光盘装置（1）通过在覆盖基板表面和记录层的区域中沿着光盘的厚度的方向移动通过物镜发射的激光束的焦点来进行聚焦搜索（ 2）当焦点通过衬底表面和记录层分别转换成数字信号CPout时，将从聚焦误差信号FES产生的S形波形转换成两片光电二极管，以及（3）检测脉冲 数字信号CPout的间隔，通过MPU。 由于MPU检测到数字信号CPout的脉冲数，所以光盘装置也可以检测记录层的数量。

公开(公告)号：US5084848A

公开(公告)日：1992-01-28

申请号：US369124

申请日：1989-06-21

申请人： Toshihisa Deguchi ,  Tomiyuki Numata ,  Masaru Nomura ,  Kunio Kojima

发明人： Toshihisa Deguchi ,  Tomiyuki Numata ,  Masaru Nomura ,  Kunio Kojima

IPC分类号： G11B7/09

CPC分类号： G11B7/094

摘要： A feedback control apparatus in an optical recording and reproducing device for recording, reproducing and/or erasing data from an optical recording medium projects a light beam emitted from an optical head onto the optical recording medium. The apparatus includes an actuator for controlling the illuminating conditions of the light beam projected onto the optical recording medium, a detection unit for detecting the illuminating conditions of the light beam projected onto the optical recording medium, and a control amplifier for driving the actuator in accordance with a detection signal outputted from the detection unit, thereby controlling the illuminating conditions of the light beam projected onto the recording medium. The apparatus further includes a switching device for selectively switching from a detection signal from the detection unit to a reference signal, or vice versa, and for inputting into the control amplifier, the reference signal having the same signal level as that of a detection signal which is expected to be outputted from the detection unit when the illuminating conditions of the light beam projected onto the recording medium are appropriate. An offset compensation device outputs an offset compensation signal to the control amplifier. The offset compensation signal is set such that a control signal generated in the control amplifier has a predetermined signal level when the reference signal is inputted into the control amplifier. The apparatus prevents a DC offset from being included in the control signal from the control amplifier and reduces the procedures required for adjustment during the manufacturing process without employing expensive parts and devices and the like, thereby lowering the production costs.

公开(公告)号：US20080144476A1

公开(公告)日：2008-06-19

申请号：US11952285

申请日：2007-12-07

申请人： Tomiyuki Numata

发明人： Tomiyuki Numata

IPC分类号： G11B7/00

CPC分类号： G11B7/1263 ,  G11B7/1275 ,  G11B7/13 ,  G11B2007/0006

摘要： A first photodiode for BD receives a laser light beam separated from a laser light beam emitted from a first semiconductor laser, detects laser power of the first semiconductor laser, and outputs an output current signal. A second photodiode for DVD/CD receives a laser light beam separated from a laser light beam emitted from a second semiconductor laser, detects laser power of the second semiconductor laser, and outputs an output current signal. An output terminal of the first photodiode and an output terminal of the second photodiode are connected to each other, and the output current signal and the output current signal are both inputted to the same input terminal of the first current-voltage conversion circuit.

摘要翻译： 用于BD的第一光电二极管接收与从第一半导体激光器发射的激光束分离的激光束，检测第一半导体激光器的激光功率，并输出输出电流信号。 用于DVD / CD的第二光电二极管接收从与第二半导体激光器发射的激光束分离的激光束，检测第二半导体激光器的激光功率，并输出输出电流信号。 第一光电二极管的输出端子和第二光电二极管的输出端子彼此连接，并且输出电流信号和输出电流信号均被输入到第一电流 - 电压转换电路的相同的输入端子。

公开(公告)号：US07369479B2

公开(公告)日：2008-05-06

申请号：US11029599

申请日：2005-01-04

申请人： Masaru Ogawa ,  Tetsuo Ueyama ,  Kohji Minami ,  Tomoyuki Miyake ,  Tomiyuki Numata

发明人： Masaru Ogawa ,  Tetsuo Ueyama ,  Kohji Minami ,  Tomoyuki Miyake ,  Tomiyuki Numata

IPC分类号： G11B7/00

CPC分类号： G11B7/131 ,  G11B7/0901 ,  G11B7/123 ,  G11B7/1353 ,  G11B7/1381

摘要： The optical miniaturized module includes a semiconductor laser for irradiating an optical disk with laser light, a diffraction grating for forming a main beam and two sub beams from the laser light, a polarization hologram for dividing reflected light from the optical disk, and a photodetector for detecting the reflected light. The polarization hologram includes a first parting line defined in a direction optically corresponding to a radial direction as the optical disk rotates. A main beam M incident area is divided with a boundary defined by the first parting line. A sub beam A incident area and a sub beam B incident area are each arranged avoiding the first parting line.

摘要翻译： 该光学小型化模块包括用于用激光照射光盘的半导体激光器，用于形成主光束的衍射光栅和来自激光的两个子光束，用于分离来自光盘的反射光的偏振全息图，以及用于 检测反射光。 偏振全息图包括在光盘旋转时沿与光学对应的方向限定的第一分型线。 主波束M入射区域由第一分隔线限定的边界划分。 分别设置子光束A入射区域和副光束B入射区域，避开第一分色线。