公开(公告)号：US5648162A

公开(公告)日：1997-07-15

申请号：US177096

申请日：1993-12-30

Applicant: Junji Hirokane ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

Inventor： Junji Hirokane ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

IPC: G11B11/10 ,  G11B11/105 ,  G11B5/66

CPC classification number: G11B11/10515 ,  G11B11/10521 ,  G11B11/10591 ,  Y10S428/90 ,  Y10T428/12736 ,  Y10T428/12771 ,  Y10T428/12868 ,  Y10T428/12896 ,  Y10T428/12903 ,  Y10T428/1291 ,  Y10T428/12917 ,  Y10T428/12924 ,  Y10T428/12931 ,  Y10T428/12937 ,  Y10T428/26 ,  Y10T428/265

Abstract: A magneto-optical recording medium including a base; a readout layer formed on the base; a recording layer formed on the readout layer; and an auxiliary recording layer formed on the recording layer, each of the readout layer, recording layer and auxiliary recording layer being made of an alloy of rare-earth metal and transition metal showing ferrimagnetism. The alloy composition of each layer is determined so that the recording layer has a Curie temperature lower than Curie temperatures of the readout layer and the auxiliary recording layer and has a coercive force higher than coercive forces of the readout layer and the auxiliary recording layer at room temperature and that, when the temperature of the recording layer is raised to near its Curie temperature while perpendicularly applying a uniform recording magnetic field to each layer, a sublattice magnetic moment of the rare-earth metal of the readout layer and a sublattice magnetic moment of the rare-earth metal of the auxiliary recording layer are antiparallel to each other. And, a method of recording information on the magneto-optical recording medium. This structure enables overwriting by light-intensity modulation without using an initializing magnetic field.

Abstract translation: 一种包括基底的磁光记录介质; 形成在基底上的读出层; 形成在读出层上的记录层; 以及形成在记录层上的辅助记录层，每个读出层，记录层和辅助记录层由稀土金属和过渡金属的合金制成，显示出铁磁性。 确定每层的合金组成，使得记录层的居里温度低于读出层和辅助记录层的居里温度，并且具有高于室内读出层和辅助记录层的矫顽力的矫顽力 并且当在每个层垂直地施加均匀的记录磁场的同时将记录层的温度升高到靠近其居里温度时，读出层的稀土金属的亚晶格磁矩和亚晶格磁矩 辅助记录层的稀土金属彼此反平行。 以及在磁光记录介质上记录信息的方法。 该结构能够通过光强度调制而不使用初始化磁场。

公开(公告)号：US5645978A

公开(公告)日：1997-07-08

申请号：US314194

申请日：1994-09-28

Applicant: Tetsuya Inui ,  Akira Takahashi ,  Kenji Ohta

Inventor： Tetsuya Inui ,  Akira Takahashi ,  Kenji Ohta

IPC: G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B7/24 ,  G11B7/26 ,  G11B11/10 ,  G11B11/105 ,  G03C5/00

CPC classification number: G11B7/24079 ,  G11B11/10565 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0938 ,  G11B7/261 ,  G11B11/10578 ,  G11B11/10582 ,  G11B7/24085

Abstract: Methods for manufacturing an optical disk having spiral or concentric grooves and land portions between the grooves are disclosed. In one aspect, the methods include projection of light spots onto a photosensitive material so that areas of the photosensitive material exposed to a first light spot form the pattern of spiral or concentric grooves and that areas of said photosensitive material which correspond to said land portions and are exposed to a second light spot form a predetermined pit pattern.

Abstract translation: 公开了用于制造具有螺旋或同心凹槽的光盘和凹槽之间的平台部分的方法。 在一个方面，所述方法包括将光点投影到感光材料上，使得暴露于第一光点的感光材料的区域形成螺旋或同心凹槽的图案，以及对应于所述接地部分的所述感光材料的区域，以及 暴露于形成预定凹坑图案的第二光点。

公开(公告)号：US5615180A

公开(公告)日：1997-03-25

申请号：US198620

申请日：1994-02-18

Applicant: Michinobu Mieda ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

Inventor： Michinobu Mieda ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

IPC: G11B11/10 ,  G11B11/105 ,  G11B11/00

CPC classification number: G11B11/10586 ,  G11B11/10534 ,  G11B11/10506 ,  G11B11/10519 ,  G11B11/10523

Abstract: A magneto-optical disk is provided with a recording layer that exhibits perpendicular magnetization, an intermediate layer wherein in-plane magnetization occurs at room temperature and a transition from the in-plane magnetization to perpendicular magnetization occurs as the temperature thereof rises, and an auxiliary layer that is made of a rare-earth-transition-metal alloy and that exhibits perpendicular magnetization, and these layers are laminated in this order. The composition of the rare-earth-transition-metal alloy is set so that the magnetic moment of the rare-earth metal is relatively greater than that of the transition metal at room temperature and the compensation temperature is located between room temperature and the Curie temperature T.sub.c3. A magneto-optical recording apparatus for rewriting information on the magneto-optical disk is provided with a single magnet for applying H.sub.w onto a portion on the magneto-optical disk irradiated by a light beam, as well as for applying H.sub.init having a greater intensity than H.sub.w onto a portion that is apart from the portion irradiated by the light beam. This arrangement makes it possible to achieve a more compact, thinner magneto-optical recording apparatus which allows light-modulation overwriting.

Abstract translation: 磁光盘设置有表现出垂直磁化的记录层，其中在室温下发生面内磁化的中间层，并且随着其温度升高而发生从平面内磁化到垂直磁化的转变，辅助 层，其由稀土 - 过渡金属合金制成并且呈现垂直磁化，并且这些层依次层压。 设定稀土 - 过渡金属合金的组成使得稀土金属的磁矩在室温下比过渡金属的磁矩更大，并且补偿温度位于室温和居里温度之间 Tc3。 用于在磁光盘上重写信息的磁光记录装置设置有用于将Hw施加到由光束照射的磁光盘上的部分上的单个磁体，以及用于施加具有比光束更大的强度的Hinit Hw到与光束照射的部分分开的部分。 这种布置使得可以实现允许光调制重写的更紧凑，更薄的磁光记录装置。

公开(公告)号：US5595805A

公开(公告)日：1997-01-21

申请号：US318536

申请日：1994-10-05

Applicant: Junichiro Nakayama ,  Junsaku Nakajima ,  Akira Takahashi ,  Kenji Ohta

Inventor： Junichiro Nakayama ,  Junsaku Nakajima ,  Akira Takahashi ,  Kenji Ohta

IPC: G11B11/10 ,  G11B11/105 ,  G11B5/66

CPC classification number: G11B11/10515 ,  G11B11/10584 ,  G11B11/10586 ,  Y10S428/90

Abstract: A magneto-optical medium has a substrate through which a light beam is transmitted and a recording-reproduction layer. The recording-reproduction layer, which exhibits an in-plane magnetization characteristic at the first temperature while still containing magnetization components in the perpendicular direction corresponding to information, comes to exhibit a perpendicular magnetization characteristic above the second temperature higher than the first temperature. In this magneto-optical recording medium, information is reproduced by utilizing a temperature distribution of the recording-reproduction layer being subjected to irradiation of a light beam and by raising the temperature of a portion within a light spot of the light beam from the first temperature to the second temperature.

Abstract translation: 磁光介质具有透射光束的基板和记录再生层。 在与信息对应的垂直方向上仍然含有磁化成分的情况下，在第一温度下表现出面内磁化特性的记录再现层在高于第一温度的第二温度以上呈现垂直磁化特性。 在该磁光记录介质中，通过利用经受光束照射的记录再生层的温度分布，并且通过将来自第一温度的光束的光斑内的部分的温度升高来再现信息 到第二个温度。

公开(公告)号：US5477528A

公开(公告)日：1995-12-19

申请号：US346586

申请日：1994-11-16

Applicant: Yoshiteru Murakami ,  Junsaku Nakajima ,  Akira Takahashi ,  Junichiro Nakayama ,  Kenji Ohta

Inventor： Yoshiteru Murakami ,  Junsaku Nakajima ,  Akira Takahashi ,  Junichiro Nakayama ,  Kenji Ohta

IPC: G11B11/10 ,  G11B11/105 ,  G11B7/00

CPC classification number: G11B11/10515 ,  G11B11/10595

Abstract: A magneto-optical disk, which possesses a disc-shaped substrate and a recording layer composed of a perpendicular magnetization film that is formed on the substrate, characterized in having: an area wherein magnetic domains having an upward magnetization and magnetic domains having a downward magnetization are alternately aligned along at least one circuit of the disk, the area being formed on the recording layer, the length of the magnetic domains having the upward magnetization being virtually equal to the length of the magnetic domains having the downward magnetization. This invention also has a reproducing method which is characterized in that, when information is reproduced by projecting a light beam onto the magneto-optical recording disk, the intensity of the light beam is adjusted so as to maximize the amplitude of a reproduced signal that is obtained from the area. With the above arrangement, a high-quality reproduced signal can be obtained independent of the characteristics of individual magneto-optical disks.

Abstract translation: 一种磁光盘，其具有盘形基板和由形成在基板上的垂直磁化膜构成的记录层，其特征在于具有：具有向上磁化的磁畴和具有向下磁化的磁畴的区域 沿着盘的至少一个电路交替排列，所述区域形成在记录层上，具有向上磁化的磁畴的长度实质上等于具有向下磁化的磁畴的长度。 本发明还具有一种再现方法，其特征在于，当通过将光束投射到磁光记录盘上来再现信息时，调整光束的强度，以使得再现信号的幅度最大化 从该地区获得。 通过上述配置，可以独立于各个磁光盘的特性来获得高质量的再生信号。

公开(公告)号：US5452272A

公开(公告)日：1995-09-19

申请号：US175748

申请日：1993-12-30

Applicant: Yoshiteru Murakami ,  Junsaku Nakajima ,  Akira Takahashi ,  Kenji Ohta

Inventor： Yoshiteru Murakami ,  Junsaku Nakajima ,  Akira Takahashi ,  Kenji Ohta

IPC: G11B7/135 ,  G11B11/10 ,  G11B11/105 ,  G11B11/00

CPC classification number: G11B11/10586 ,  G11B11/10515 ,  G11B11/10543

Abstract: A magneto-optical recording and reproducing device is provided with a magneto-optical disk for reproducing recorded information using light, a semiconductor laser, an objective lens for converging a light beam emitted from the semiconductor laser onto the magneto-optical disk and a light interrupting member for interrupting a portion of a light beam before it is incident on the objective lens. The magneto-optical disk is composed of a readout layer which is predominant in in-plane magnetization, and in which a transition occurs to be predominant in perpendicular magnetization as temperature thereof is raised and a recording layer for recording thereon information using a perpendicular magnetization. In this arrangement, since the light interrupting member is provided, a light spot can be made smaller, thereby improving a recording density. Moreover, even when temperature of the readout layer is raised due to a side robe generated by the light interrupting member, in-plane magnetization is maintained in the readout layer. Thus, interference by unwanted reproducing signals due to the side robe can be prevented, thereby improving a reproducing signal quality.

Abstract translation: 磁光记录和再现装置设置有用于使用光再现记录信息的磁光盘，半导体激光器，用于将从半导体激光器发射的光束会聚到磁光盘上的物镜和光中断 用于在光束入射到物镜之前中断光束的一部分。 磁光盘由在平面磁化中占主要地位的读出层组成，其中随着温度的升高而在垂直磁化中发生转移，而在其中利用垂直磁化记录信息的记录层。 在这种布置中，由于设置了遮光构件，可以使光点更小，从而提高记录密度。 此外，即使由于由遮光构件产生的侧蓬而导致读出层的温度上升，在读出层中也保持平面内的磁化。 因此，可以防止由于侧灯引起的不必要的再现信号的干扰，从而提高再现信号质量。

公开(公告)号：US5381705A

公开(公告)日：1995-01-17

申请号：US111789

申请日：1993-08-26

Applicant: Akira Takahashi

Inventor： Akira Takahashi

IPC: B62D5/04 ,  B62D7/14 ,  B62D7/15 ,  B62D3/04

CPC classification number: B62D5/0442 ,  B62D7/1581 ,  Y10T74/18936

Abstract: A crank spindle formed with an eccentric pin at one end thereof is pivotally supported by bearings within a casing. The crank spindle is driven by a motor and a worm mechanism. A cross pin member formed with an upper axle and a lower axle is pivotally fitted to the eccentric pin of the crank spindle. An upper holder is fitted to the upper axle of the cross pin member and a lower holder is fitted to the lower axle thereof. A steering bar is fastened to the lower holder. When the eccentric pin is pivoted by the motor and the worm mechanism, since the cross pin member is pivoted, the upper and lower holders are also pivoted to shift the steering bar in the horizontal direction. The rear wheel steering apparatus can be installed within a small space.

Abstract translation: 在其一端形成有偏心销的曲柄轴由壳体内的轴承枢转地支撑。 曲轴由电机和蜗杆机构驱动。 形成有上轴和下轴的十字销构件枢转地配合到曲柄轴的偏心销上。 上支架装配到十字销构件的上轴上，下保持器安装在其下轴上。 转向杆固定在下支架上。 当偏心销由电机和蜗杆机构枢转时，由于十字销构件被枢转，所以上和下保持器也枢转以使转向杆沿水平方向移动。 后轮转向装置可以安装在较小的空间内。

公开(公告)号：US5335220A

公开(公告)日：1994-08-02

申请号：US821361

申请日：1992-01-16

Applicant: Kenji Ohta ,  Tetsuya Inui ,  Hiroyuki Katayama ,  Akira Takahashi ,  Junji Hirokane ,  Yukinori Nishitani ,  Michinobu Mieda ,  Kazuo Van

Inventor： Kenji Ohta ,  Tetsuya Inui ,  Hiroyuki Katayama ,  Akira Takahashi ,  Junji Hirokane ,  Yukinori Nishitani ,  Michinobu Mieda ,  Kazuo Van

IPC: G11B7/0045 ,  G11B7/013 ,  G11B7/09 ,  G11B7/125 ,  G11B7/24 ,  G11B7/24085 ,  G11B11/105 ,  G11B19/02 ,  G11B3/78

CPC classification number: G11B7/0045 ,  G11B11/10528 ,  G11B11/10578 ,  G11B11/10595 ,  G11B19/02 ,  G11B7/0938 ,  G11B7/126 ,  G11B7/24 ,  G11B7/24085

Abstract: An optical recording element comprising a recording medium which includes an information recording area formed at every unit in a non-continuous condition, the recording medium further including sample pits disposed at intervals of a fixed distance for providing basic information about the locations of the recording units in same track. Each sample pit comprises a plurality of pits disposed next to the sequence of the recording units so that the spacing between the pits differs from the spacing between the recording units. At least one of the plurality of pits is a long-sized inclined pit which is inclined at an angle in the range of 6.degree. to 80.degree. to a recording track. A driving system for driving the optical recording element for recording information in the non-continuous recording area or erasing information stored therein with a light beam the output of which is varied as required and checking whether said recording or erasing has been correctly performed, within a very short time in which the light beam passes through the non-continuous recording area. By using the optical recording element in combination with its driving system, the processing speed for reducing, erasing and verifying these functions can be greatly improved and the irradiating position of the light beam at every recording unit can be correctly controlled.

Abstract translation: 一种光记录元件，包括记录介质，该记录介质包括在非连续状态下在每个单元处形成的信息记录区域，所述记录介质还包括以固定距离间隔设置的样品坑，以提供关于记录单元的位置的基本信息 在同一轨道。 每个采样坑包括靠近记录单元序列设置的多个凹坑，使得凹坑之间的间隔与记录单元之间的间隔不同。 多个凹坑中的至少一个是相对于记录轨道以6°至80°的角度倾斜的长尺寸倾斜凹坑。 一种驱动系统，用于驱动用于在非连续记录区域中记录信息的光学记录元件，或者用存储在其中的光束擦除信息，该光束的输出根据需要变化，并且检查是否正确地执行了所述记录或擦除 光束通过非连续记录区域的非常短的时间。 通过与其驱动系统结合使用光学记录元件，可以大大提高用于减少，擦除和验证这些功能的处理速度，并且可以正确地控制每个记录单元处的光束的照射位置。

公开(公告)号：US5311853A

公开(公告)日：1994-05-17

申请号：US12641

申请日：1993-02-03

Applicant: Akira Takahashi ,  Masashi Chino ,  Tohru Hashimoto ,  Mitsuhiro Miyake ,  Minoru Nishida ,  Hideaki Katashiba

Inventor： Akira Takahashi ,  Masashi Chino ,  Tohru Hashimoto ,  Mitsuhiro Miyake ,  Minoru Nishida ,  Hideaki Katashiba

IPC: F02D41/14

CPC classification number: F02D41/1479 ,  F02D41/1408 ,  F02D41/1483

Abstract: An exhaust gas cleaning device for controlling the air-to-fuel ratio of the air-fuel mixture supplied to an internal combustion engine (1) provided with a catalytic converter (14) disposed in the exhaust pipe (13). The air-to-fuel ratio is oscillated around the central level of the integral control or proportional plus integral feedback control signal based on the output of an air-to-fuel ratio sensor (12); the amplitude of oscillation and the proportional control amount are, or alternatively, the frequency of the oscillation is, varied in accordance with the operating condition of the engine.

Abstract translation: 一种废气净化装置，用于控制供给到设置在排气管（13）中的催化转化器（14）的内燃机（1）的空气燃料混合物的空燃比。 基于空燃比传感器（12）的输出，空燃比围绕积分控制或比例积分反馈控制信号的中心水平振荡; 振荡的振幅和比例控制量，或者替代地，振荡的频率根据发动机的运行状态而变化。

公开(公告)号：US5293359A

公开(公告)日：1994-03-08

申请号：US741932

申请日：1991-08-08

Applicant: Kenji Ohta ,  Akira Takahashi ,  Junsaku Nakajima ,  Yoshiteru Murakami ,  Junji Hirokane

Inventor： Kenji Ohta ,  Akira Takahashi ,  Junsaku Nakajima ,  Yoshiteru Murakami ,  Junji Hirokane

IPC: G11B5/02 ,  G11B5/00 ,  G11B11/10 ,  G11B11/105 ,  G11B13/04

CPC classification number: G11B5/00 ,  G11B2005/0021

Abstract: A magnetic recording and reproducing apparatus using a recording medium made of a ferrimagnetic material, comprises a magnetic head for magnetically recording information on a recording area of a selected information recording track on a recording medium having a plurality of tracks and for magnetically reproducing the information from the recording medium, the magnetic head has a width larger than that of the width of the selected information recording track of the recording medium. For recording, light beams are radiated from a first light source on the recording area of the selected information recording track upon which recording is to be performed tracks to raise the temperature of the irradiated area to approximately a Curie temperature so as to allow recording only on that area. For reproduction, light beams are radiated from another light source onto areas on both sides of on a second area of the recording medium, located on both sides of the selected information recording track, to raise the temperature of the second irradiated areas to approximately a magnetic compensation temperature so as to allow reproduction only from the desired track, thus preventing crosstalk from the side tracks.

Abstract translation: 使用由铁氧体材料制成的记录介质的磁记录和再现装置包括磁头，用于在具有多个轨道的记录介质上将所选择的信息记录轨道的记录区域上的信息磁记录，并用于从 记录介质中，磁头的宽度大于记录介质的选定信息记录道的宽度。 为了进行记录，光束从要进行记录的所选择的信息记录轨道的记录区域上的第一光源辐射，以将照射区域的温度升高到大约居里温度，以便仅在 那个地区。 为了再现，将光束从另一光源辐射到位于所选择的信息记录轨道的两侧的记录介质的第二区域的两侧的区域上，以将第二照射区域的温度升高到大约磁 补偿温度，以便仅允许从期望的轨道进行再现，从而防止来自侧轨的串扰。