公开(公告)号：US06480444B2

公开(公告)日：2002-11-12

申请号：US10076531

申请日：2002-02-19

申请人： Koichi Tada ,  Shinichi Ohe ,  Naoyuki Takagi ,  Ken Hirose ,  Shuichi Ichiura ,  Hiroshi Watanabe

发明人： Koichi Tada ,  Shinichi Ohe ,  Naoyuki Takagi ,  Ken Hirose ,  Shuichi Ichiura ,  Hiroshi Watanabe

IPC分类号： G11B700

CPC分类号： G11B7/1372 ,  G11B7/085 ,  G11B7/08511 ,  G11B7/08529 ,  G11B7/0901 ,  G11B7/1376 ,  G11B2007/0013

摘要： In order to reproduce signals from a double-layer optical disc having two signal recording surfaces, a focus jump that the focusing of an objective lens from the one signal recording surface to the other signal recording surface is quickly achieved, is necessary. When a focus error signal (FE) from a pickup (60, 70) reaches a predetermined threshold value (Vcomp), a deceleration signal for decelerating the objective lens (42) is supplied to an actuator (47). Preferably, a deceleration pulse voltage is lowered step by step. The deceleration pulse voltage is determined in accordance with the maximum value (DFEmax) of a differential focus error signal (DFE) generated by differentiating the focus error signal (FE). Preferably, the address seeking is done simultaneously with the focus jump. The focus jump is performed in accordance with the layer-to-layer distance which is measured beforehand. The focus jump is performed by using a lens (143) having a controllable focal distance. Preferably, whether the layer is the first layer or the second layer is judged based on the reflected luminous power. If the focus error signal (FE) from the other layer is not obtained even when a certain time passages after the focus jump is started, the objective lens (42) is moved in the reverse direction.

公开(公告)号：US06477122B2

公开(公告)日：2002-11-05

申请号：US10076529

申请日：2002-02-19

申请人： Koichi Tada ,  Shinichi Ohe ,  Naoyuki Takagi ,  Ken Hirose ,  Shuichi Ichiura ,  Hiroshi Watanabe

发明人： Koichi Tada ,  Shinichi Ohe ,  Naoyuki Takagi ,  Ken Hirose ,  Shuichi Ichiura ,  Hiroshi Watanabe

IPC分类号： G11B700

CPC分类号： G11B7/1372 ,  G11B7/085 ,  G11B7/08511 ,  G11B7/08529 ,  G11B7/0901 ,  G11B7/1376 ,  G11B2007/0013

摘要： In order to reproduce signals from a double-layer optical disc having two signal recording surfaces, a focus jump that the focusing of an objective lens from the one signal recording surface to the other signal recording surface is quickly achieved, is necessary. When a focus error signal (FE) from a pickup (60, 70) reaches a predetermined threshold value (Vcomp), a deceleration signal for decelerating the objective lens (42) is supplied to an actuator (47). Preferably, a deceleration pulse voltage is lowered step by step. The deceleration pulse voltage is determined in accordance with the maximum value (DFEmax) of a differential focus error signal (DFE) generated by differentiating the focus error signal (FE). Preferably, the address seeking is done simultaneously with the focus jump. The focus jump is performed in accordance with the layer-to-layer distance which is measured beforehand. The focus jump is performed by using a lens (143) having a controllable focal distance. Preferably, whether the layer is the first layer or the second layer is judged based on the reflected luminous power. If the focus error signal (FE) from the other layer is not obtained even when a certain time passages after the focus jump is started, the objective lens (42) is moved in the reverse direction.

公开(公告)号：US06466527B1

公开(公告)日：2002-10-15

申请号：US10076556

申请日：2002-02-19

申请人： Koichi Tada ,  Shinichi Ohe ,  Naoyuki Takagi ,  Ken Hirose ,  Shuichi Ichiura ,  Hiroshi Watanabe

发明人： Koichi Tada ,  Shinichi Ohe ,  Naoyuki Takagi ,  Ken Hirose ,  Shuichi Ichiura ,  Hiroshi Watanabe

IPC分类号： G11B700

CPC分类号： G11B7/08511 ,  G11B7/1376 ,  G11B2007/0013

摘要： In order to reproduce signals from a double-layer optical disc having two signal recording surfaces, a focus jump that the focusing of an objective lens from the one signal recording surface to the other signal recording surface is quickly achieved, is necessary. When a focus error signal (FE) from a pickup (60, 70) reaches a predetermined threshold value (Vcomp), a deceleration signal for decelerating the objective lens (42) is supplied to an actuator (47). Preferably, a deceleration pulse voltage is lowered step by step. The deceleration pulse voltage is determined in accordance with the maximum value (DFEmax) of a differential focus error signal (DFE) generated by differentiating the focus error signal (FE). Preferably, the address seeking is done simultaneously with the focus jump. The focus jump is performed in accordance with the layer-to-layer distance which is measured beforehand. The focus jump is performed by using a lens (143) having a controllable focal distance. Preferably, whether the layer is the first layer or the second layer is judged based on the reflected luminous power. If the focus error signal (FE) from the other layer is not obtained even when a certain time passages after the focus jump is started, the objective lens (42) is moved in the reverse direction.

摘要翻译： 为了从具有两个信号记录表面的双层光盘再现信号，需要快速实现从一个信号记录表面到另一个信号记录表面的物镜的聚焦的聚焦跳跃。 当来自拾取器（60,70）的聚焦误差信号（FE）达到预定阈值（Vcomp）时，用于减速物镜（42）的减速信号被提供给致动器（47）。 优选地，减速脉冲电压逐步降低。 根据通过微分聚焦误差信号（FE）产生的差分聚焦误差信号（DFE）的最大值（DFEmax）来确定减速脉冲电压。 优选地，寻址与焦点跳跃同时完成。 按照预先测量的层间距离执行聚焦跳转。 通过使用具有可控焦距的透镜（143）来进行聚焦跳跃。 优选地，基于反射的光功率来判断层是第一层还是第二层。 如果即使在聚焦跳跃开始之后经过一定时间，也不能获得来自另一层的聚焦误差信号（FE），则物镜42沿相反方向移动。

公开(公告)号：US06459662B1

公开(公告)日：2002-10-01

申请号：US10076228

申请日：2002-02-19

申请人： Koichi Tada ,  Shinichi Ohe ,  Naoyuki Takagi ,  Ken Hirose ,  Shuichi Ichiura ,  Hiroshi Watanabe

发明人： Koichi Tada ,  Shinichi Ohe ,  Naoyuki Takagi ,  Ken Hirose ,  Shuichi Ichiura ,  Hiroshi Watanabe

IPC分类号： G11B700

CPC分类号： G11B7/1372 ,  G11B7/085 ,  G11B7/08511 ,  G11B7/08529 ,  G11B7/0901 ,  G11B7/1376 ,  G11B2007/0013

摘要： In order to reproduce signals from a double-layer optical disc having two signal recording surfaces, a focus jump that the focusing of an objective lens from the one signal recording surface to the other signal recording surface is quickly achieved, is necessary. When a focus error signal (FE) from a pickup (60, 70) reaches a predetermined threshold value (Vcomp), a deceleration signal for decelerating the objective lens (42) is supplied to an actuator (47). Preferably, a deceleration pulse voltage is lowered step by step. The deceleration pulse voltage is determined in accordance with the maximum value (DFEmax) of a differential focus error signal (DFE) generated by differentiating the focus error signal (FE). Preferably, the address seeking is done simultaneously with the focus jump. The focus jump is performed in accordance with the layer-to-layer distance which is measured beforehand. The focus jump is performed by using a lens (143) having a controllable focal distance. Preferably, whether the layer is the first layer or the second layer is judged based on the reflected luminous power. If the focus error signal (FE) from the other layer is not obtained even when a certain time passages after the focus jump is started, the objective lens (42) is moved in the reverse direction.

公开(公告)号：US06370093B1

公开(公告)日：2002-04-09

申请号：US09230540

申请日：1999-01-28

申请人： Koichi Tada ,  Shinichi Ohe ,  Naoyuki Takagi ,  Ken Hirose ,  Shuichi Ichiura ,  Hiroshi Watanabe

发明人： Koichi Tada ,  Shinichi Ohe ,  Naoyuki Takagi ,  Ken Hirose ,  Shuichi Ichiura ,  Hiroshi Watanabe

IPC分类号： G11B700

CPC分类号： G11B7/1372 ,  G11B7/085 ,  G11B7/08511 ,  G11B7/08529 ,  G11B7/0901 ,  G11B7/1376 ,  G11B2007/0013

摘要： In order to reproduce signals from a double-layer optical disc having two signal recording surfaces, a focus jump that the focusing of an objective lens from the one signal recording surface to the other signal recording surface is quickly achieved, is necessary. When a focus error signal (FE) from a pickup (60, 70) reaches a predetermined threshold value (Vcomp), a deceleration signal for decelerating the objective lens (42) is supplied to an actuator (47). Preferably, a deceleration pulse voltage is lowered step by step. The deceleration pulse voltage is determined in accordance with the maximum value (DFEmax) of a differential focus error signal (DFE) generated by differentiating the focus error signal (FE). Preferably, the address seeking is done simultaneously with the focus jump. The focus jump is performed in accordance with the layer-to-layer distance which is measured beforehand. The focus jump is performed by using a lens (143) having a controllable focal distance. Preferably, whether the layer is the first layer or the second layer is judged based on the reflected luminous power. If the focus error signal (FE) from the other layer is not obtained even when a certain time passages after the focus jump is started, the objective lens (42) is moved in the reverse direction.

摘要翻译： 为了从具有两个信号记录表面的双层光盘再现信号，需要快速实现从一个信号记录表面到另一个信号记录表面的物镜的聚焦的聚焦跳跃。 当来自拾取器（60,70）的聚焦误差信号（FE）达到预定阈值（Vcomp）时，用于减速物镜（42）的减速信号被提供给致动器（47）。 优选地，减速脉冲电压逐步降低。 根据通过微分聚焦误差信号（FE）产生的差分聚焦误差信号（DFE）的最大值（DFEmax）来确定减速脉冲电压。 优选地，寻址与焦点跳跃同时完成。 按照预先测量的层间距离执行聚焦跳转。 通过使用具有可控焦距的透镜（143）来进行聚焦跳跃。 优选地，基于反射的光功率来判断层是第一层还是第二层。 如果即使在聚焦跳跃开始之后经过一定时间，也不能获得来自另一层的聚焦误差信号（FE），则物镜42沿相反方向移动。

公开(公告)号：US06201777B1

公开(公告)日：2001-03-13

申请号：US09251448

申请日：1999-02-17

申请人： Yoichi Tsuchiya ,  Seiji Kajiyama ,  Yasuyuki Kanou ,  Shuichi Ichiura ,  Koichi Tada ,  Masami Shimizu ,  Toshio Harada

发明人： Yoichi Tsuchiya ,  Seiji Kajiyama ,  Yasuyuki Kanou ,  Shuichi Ichiura ,  Koichi Tada ,  Masami Shimizu ,  Toshio Harada

IPC分类号： G11B2010

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

摘要： An apparatus for discriminating optical disks has an optical pickup provided with an objective lens having an effective numerical aperture of 0.55 to 0.65, which can compatibly reproduce information from a CD and an SD. The apparatus discriminates presence/absence of waveforms of two focus error signals detected when the effective numerical aperture of the objective lens is set at 0.55 to 0.65 and 0.20 to 0.45 respectively in a process of performing focus servo control, thereby discriminating various types of optical disks from each other. Thus, optical disks having different substrate thicknesses, different track pitches, different minimum pit lengths and different reflectivity can be quickly and simply discriminated from each other.

摘要翻译： 用于识别光盘的装置具有设置有具有0.55至0.65的有效数值孔径的物镜的光学拾取器，其可以兼容地再现来自CD和SD的信息。 当在执行聚焦伺服控制的过程中，当物镜的有效数值孔径分别设定为0.55至0.65和0.20至0.45时，所述装置鉴别出检测到的两个聚焦误差信号的波形的存在/不存在，从而区分各种类型的光盘 从彼此。 因此，可以快速且简单地区分具有不同衬底厚度，不同轨道间距，不同最小凹坑长度和不同反射率的光盘。

公开(公告)号：US5917791A

公开(公告)日：1999-06-29

申请号：US689019

申请日：1996-07-30

申请人： Yoichi Tsuchiya ,  Seiji Kajiyama ,  Yasuyuki Kanou ,  Shuichi Ichiura ,  Koichi Tada ,  Masami Shimizu ,  Toshio Harada

发明人： Yoichi Tsuchiya ,  Seiji Kajiyama ,  Yasuyuki Kanou ,  Shuichi Ichiura ,  Koichi Tada ,  Masami Shimizu ,  Toshio Harada

IPC分类号： G11B7/00 ,  G11B7/09 ,  G11B7/12 ,  G11B19/12 ,  G11B3/90

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

摘要： An apparatus for discriminating optical disks has an optical pickup provided with an objective lens having an effective numerical aperture of 0.55 to 0.65, which can compatibly reproduce information from a CD and an SD. The apparatus discriminates presence/absence of waveforms of two focus error signals detected when the effective numerical aperture of the objective lens is set at 0.55 to 0.65 and 0.20 to 0.45 respectively in a process of performing focus servo control, thereby discriminating various types of optical disks from each other. Thus, optical disks having different substrate thicknesses, different track pitches, different minimum pit lengths and different reflectivity can be quickly and simply discriminated from each other.

摘要翻译： 用于识别光盘的装置具有设置有具有0.55至0.65的有效数值孔径的物镜的光学拾取器，其可以兼容地再现来自CD和SD的信息。 当在执行聚焦伺服控制的过程中，当物镜的有效数值孔径分别设定为0.55至0.65和0.20至0.45时，所述装置鉴别出检测到的两个聚焦误差信号的波形的存在/不存在，从而区分各种类型的光盘 从彼此。 因此，可以快速且简单地区分具有不同衬底厚度，不同轨道间距，不同最小凹坑长度和不同反射率的光盘。

公开(公告)号：US06975569B2

公开(公告)日：2005-12-13

申请号：US10333905

申请日：2001-10-18

申请人： Koichi Tada ,  Toshitaka Kuma ,  Hiroshi Watanabe

发明人： Koichi Tada ,  Toshitaka Kuma ,  Hiroshi Watanabe

IPC分类号： G11B7/004 ,  G11B7/005 ,  G11B7/007 ,  G11B11/105 ,  G11B20/14 ,  G11B27/19 ,  G11B27/24 ,  G11B5/09

CPC分类号： G11B7/004 ,  G11B7/0053 ,  G11B7/00718 ,  G11B7/24082 ,  G11B11/10502 ,  G11B11/10595 ,  G11B20/1403 ,  G11B27/19 ,  G11B27/24

摘要： A digital signal processor (1045) arithmetically determines a comparison level for comparing each signal component by determining a comparison level of comparators (1033 and 1034) for comparing a fine clock mark signal such that a larger weight is assigned to the comparison level of the signal component already compared. The comparators (1033 and 1034) compare the fine clock mark signal with reference to a level set on a peak side and a level set on a bottom side. When digital signal processor (1045) receives the comparison signal from one of the comparators (1033 and 1034) prior to the comparison signal sent from the other, the digital signal processor produces a fine clock mark detection signal FCMT based on the comparison signal sent from a comparator (1047). Thereby, the clock can be accurately produced based on the fine clock mark signal even when a signal component having a larger amplitude than that of the fine clock mark signal is detected.

摘要翻译： 数字信号处理器（1045）通过确定用于比较精细时钟标记信号的比较器（1033和1034）的比较电平来算术地确定比较每个信号分量的比较电平，使得较大的权重被分配给信号的比较电平 组件已经比较。 比较器（1033和1034）将精细时钟标记信号与在峰值侧设置的电平和在底侧设置的电平进行比较。 当数字信号处理器（1045）在从另一个发送的比较信号之前从比较器（1033和1034）之一接收到比较信号时，数字信号处理器基于从...发送的比较信号产生精确的时钟标记检测信号FCMT 比较器（1047）。 因此，即使当检测到具有比精细时钟标记信号的幅度大的信号分量时，也可以基于精细时钟标记信号精确地产生时钟。

公开(公告)号：US07242651B2

公开(公告)日：2007-07-10

申请号：US10432638

申请日：2001-12-10

申请人： Kenji Asano ,  Hideaki Yano ,  Koichi Tada

发明人： Kenji Asano ,  Hideaki Yano ,  Koichi Tada

IPC分类号： G11B7/05 ,  G11B11/10

CPC分类号： G11B20/10222 ,  G11B7/005 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0945 ,  G11B11/10515 ,  G11B20/10009 ,  G11B20/10481 ,  G11B20/1816 ,  G11B27/10 ,  G11B2020/1287 ,  G11B2220/2562

摘要： The invention provides a disk playback device wherein a disk (1) is irradiated with a laser beam from an optical head (4) to reproduce signals from the disk, and which comprises an external synchronizing signal producing circuit (8) and a delay circuit (12) for producing a reproduction synchronizing signal providing reference timing at which a reproduced signal is detected by reading an output signal from the optical head (4), a circuit (7) for detecting the reproduced signal by reading the output signal from the optical head (4) based on the reproduction synchronizing signal, and a system controller (10) for determining an optimum phase for a normal reproduction operation by altering the phase of the reproduction synchronizing signal and executing a reproduction operation, the controller (10) being operable to make a phase adjustment for the reproduction synchronizing signal prepared by the delay circuit (12). A normal reproduction operation can be performed at all times by assuring the reproduction synchronizing signal of the optimum phase.

摘要翻译： 本发明提供了一种光盘播放装置，其中光盘（1）被来自光头（4）的激光束照射以再现来自盘的信号，并且包括外部同步信号产生电路（8）和延迟电路 12），用于产生再现同步信号，通过读取来自光头（4）的输出信号，提供检测再现信号的参考定时;电路（7），用于通过从光头读出输出信号来检测再现信号 （4），以及系统控制器（10），用于通过改变再现同步信号的相位并执行再现操作来确定用于正常再现操作的最佳相位，所述控制器（10）可操作为 对由延迟电路（12）准备的再现同步信号进行相位调整。 通过确保最佳相位的再现同步信号，可以始终执行正常再现操作。

公开(公告)号：US5238574A

公开(公告)日：1993-08-24

申请号：US719507

申请日：1991-06-24

申请人： Norihiro Kawashima ,  Ken Yasukuni ,  Koichi Tada ,  Naoki Masa

发明人： Norihiro Kawashima ,  Ken Yasukuni ,  Koichi Tada ,  Naoki Masa

IPC分类号： B01D61/02 ,  C02F1/44

CPC分类号： C02F1/441 ,  B01D61/022

摘要： A method and an apparatus for treating salt water by a multiplicity of reverse osmosis membrane modules or a structure constituted by combining a multiplicity of reverse osmosis membrane modules and an evaporating device and thereby capable of efficiently treating it while preventing excessively large energy consumption. Salt water is passed through a plurality of reverse osmosis membrane modules so as to be separated into desalted water of a potable water level and high density concentrated water the salinity quality of which is 80,000 to 120,000 ppm.