公开(公告)号：US6025866A

公开(公告)日：2000-02-15

申请号：US64032

申请日：1998-04-22

申请人： Yoichi Tsuchiya ,  Yasuyuki Kanou ,  Seiji Kajiyama ,  Koichi Tada ,  Katsutoshi Hibino ,  Shigeki Hori

发明人： Yoichi Tsuchiya ,  Yasuyuki Kanou ,  Seiji Kajiyama ,  Koichi Tada ,  Katsutoshi Hibino ,  Shigeki Hori

IPC分类号： G11B11/10 ,  G02B27/58 ,  G11B7/00 ,  G11B7/005 ,  G11B7/125 ,  G11B7/135 ,  G11B11/105 ,  B41J2/47

CPC分类号： B82Y10/00 ,  G02B27/58 ,  G11B11/10543 ,  G11B7/1365

摘要： An optical pickup apparatus including a polarization plane rotary unit arranged between a semiconductor laser and an objective lens, and a polarizing film arranged between the polarization plane rotary unit and the objective lens. The polarization plane rotary unit includes liquid crystal, two glass plates sandwiching the liquid crystal, and transparent electrodes patterned to a predetermined configuration on an inner face of these glass planes. The polarization plane rotary unit permits passage of the laser beam without rotating the plane of polarization of the entire laser beam at the time of recording, and permits passage of the laser beam with the plane of polarization of the center portion of the laser beam rotated and the plane of polarization of the remaining outer portion of the laser beam not rotated at the time of reproduction. Only the outer portion of the laser beam is focused on a magneto-optical disk in a reproduction mode, so that a main beam of a small spot is formed by mutual interference. Since the plane of polarization of the laser beam directed on the magneto-optical disk is not rotated, the Kerr angle of rotation can be detected at high accuracy. As a result, the reproducibility is improved.

摘要翻译： 一种包括设置在半导体激光器和物镜之间的偏振面旋转单元的光拾取装置，以及配置在偏振面旋转单元与物镜之间的偏振膜。 偏振面旋转单元包括液晶，夹着液晶的两个玻璃板以及在这些玻璃平面的内表面上被图案化成预定构造的透明电极。 在记录时，偏振面旋转单元允许激光束的通过而不旋转整个激光束的偏振平面，并且允许激光束与激光束的中心部分的偏振平面一起旋转，并且 在再现时激光束的剩余外部部分的偏振面不转动。 只有激光束的外部部分在再现模式下聚焦在磁光盘上，使得通过相互干扰形成小光斑的主光束。 由于朝向磁光盘的激光束的偏振面不旋转，因此可以高精度地检测克尔角的旋转角度。 结果，再现性提高。

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：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：US6160783A

公开(公告)日：2000-12-12

申请号：US125788

申请日：1998-08-27

申请人： Yoichi Tsuchiya ,  Yasuyuki Kanou ,  Seiji Kajiyama ,  Koichi Tada

发明人： Yoichi Tsuchiya ,  Yasuyuki Kanou ,  Seiji Kajiyama ,  Koichi Tada

IPC分类号： G11B7/00 ,  G11B7/135

CPC分类号： G11B7/139 ,  G11B7/1369 ,  G11B2007/0006

摘要： An optical pick-up device includes an optical active element (11) which transmits an introduced laser beam (18) with its polarization direction (17) rotated by 90.degree. in playback of a DVD and also transmits an introduced laser beam (18) without rotating its polarization direction (17) in playback of a CD, and a polarizer (14) which transmits the entirety of a laser beam with its polarization direction rotated in playback of a DVD and also blocks the perimeter of a laser beam with its polarization direction not rotated in playback of a CD to reduce the effective numerical aperture of an objective lens (15). A rubbing direction (28) of an rubbing film (24) of the optical active element (11) that is positioned at the incident side of the laser beam, is adapted to be parallel to the polarization direction (17) of the introduced laser beam (18). Thus, the optical pick-up device can play back DVD as well as CD while reducing laser beam loss.

摘要翻译： PCT No.PCT / JP98 / 00022 Sec。 371日期1998年8月27日第 102（e）1998年8月27日PCT PCT 1998年1月7日PCT公布。 出版物WO98 / 48416 PCT 日期：1998年10月29日光拾取装置包括光学有源元件（11），其在DVD的回放中使其引导的激光束（18）的偏振方向（17）旋转90°，并且还传输引入的激光 光束（18），而不在CD的回放中旋转其偏振方向（17）;以及偏振器（14），其透射其整个激光束的偏振方向在DVD的重放中旋转，并且还阻挡激光的周边 光束的偏振方向在CD的回放中不旋转以减小物镜（15）的有效数值孔径。 位于激光束入射侧的光学有源元件（11）的摩擦膜（24）的摩擦方向（28）适于与引入的激光束的偏振方向（17）平行 （18）。 因此，光学拾取装置可以在减少激光束损耗的同时再现DVD以及CD。

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.

公开(公告)号：US20050224146A1

公开(公告)日：2005-10-13

申请号：US11101426

申请日：2005-04-08

申请人： Koichi Tada ,  Kiichi Miyazaki

发明人： Koichi Tada ,  Kiichi Miyazaki

IPC分类号： B22D11/04 ,  B22D11/00 ,  B22D11/045 ,  B22D11/049 ,  B22D11/10 ,  B22D11/106 ,  B22D21/04 ,  C22F1/06

CPC分类号： B22D11/045 ,  B22D11/001 ,  B22D11/049

摘要： A molten Mg or Mg alloy is supplied into a mold, which is sheltered from the surroundings, from a pool in a tundish, which is shielded from the surroundings. An Mg slab or Mg alloy slab in the mold is drawn out to the outside from an outlet of the mold. A cooling medium is jetted onto the slab on an outer side of and in a vicinity of the outlet to cool the slab. A sealing gas is sprayed over an entire width of a free surface of the molten Mg or Mg alloy on an inner side of and in the vicinity of the outlet, to seal a portion above the entire width of the free surface of the molten Mg or Mg alloy, whereby preventing oxygen from flowing into the mold from the portion and preventing the cooling medium from running back to the mold side.

摘要翻译： 将熔融的Mg或Mg合金从与环境屏蔽的中间包中的池中供应到与周围环境保护的模具中。 模具中的Mg板或Mg合金板从模具的出口被抽出到外部。 将冷却介质喷射到出口外侧并在出口附近的板坯上以冷却板坯。 密封气体在熔融Mg或Mg合金的自由表面的整个宽度上喷射在出口的内侧和附近，以密封熔融Mg的自由表面的整个宽度以上的部分，或 Mg合金，从而防止氧从该部分流入模具并防止冷却介质回流到模具侧。

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：US06522605B1

公开(公告)日：2003-02-18

申请号：US09650640

申请日：2000-08-30

申请人： Koichi Tada ,  Takashi Onaka

发明人： Koichi Tada ,  Takashi Onaka

IPC分类号： G11B700

CPC分类号： G11B7/0945 ,  G11B7/0053 ,  G11B7/094

摘要： A disk apparatus includes a DSP core. When turning on power to the apparatus main body or exchanging the MO disk, setting processing of focus offset (offset) values is performed. The DSP core extracts fine clock mark (FCM) signals out of the reproduced signal through tracking on the land/groove. Specifically, in a range that mean value of FCM signal levels is equal to or greater than a predetermined level, FCM signal levels are detected at positions shifted left and right by a predetermined amount from a present offset value. In this manner, scanning is made throughout the range while being shifted by a predetermined amount, each time of which a difference is detected. An offset value where the difference assumes a minimum is determined as an optimal offset value. The optimal offset values are determined respectively for the land and the groove, which are switched according to a track (land/groove) upon reproduction.

摘要翻译： 盘装置包括DSP核。 当打开设备主体的电源或更换MO盘时，执行聚焦偏移（偏移）值的设置处理。 DSP内核通过在接地/沟槽上进行跟踪，提取出再生信号中的精细时钟标记（FCM）信号。 具体地说，在FCM信号电平的平均值等于或大于预定电平的范围内，从当前偏移值向左右移动预定量的位置检测FCM信号电平。 以这种方式，在整个范围内进行扫描，同时移动预定量，每次检测到差异。 将差异假定为最小的偏移值确定为最佳偏移值。 分别对于在再现时根据轨道（平台/凹槽）切换的脊和槽分别确定最佳偏移值。