公开(公告)号：US5452272A

公开(公告)日：1995-09-19

申请号：US175748

申请日：1993-12-30

申请人： Yoshiteru Murakami ,  Junsaku Nakajima ,  Akira Takahashi ,  Kenji Ohta

发明人： Yoshiteru Murakami ,  Junsaku Nakajima ,  Akira Takahashi ,  Kenji Ohta

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

CPC分类号： G11B11/10586 ,  G11B11/10515 ,  G11B11/10543

摘要： 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.

摘要翻译： 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：US5595805A

公开(公告)日：1997-01-21

申请号：US318536

申请日：1994-10-05

申请人： Junichiro Nakayama ,  Junsaku Nakajima ,  Akira Takahashi ,  Kenji Ohta

发明人： Junichiro Nakayama ,  Junsaku Nakajima ,  Akira Takahashi ,  Kenji Ohta

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

CPC分类号： G11B11/10515 ,  G11B11/10584 ,  G11B11/10586 ,  Y10S428/90

摘要： 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.

摘要翻译： 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：US4786551A

公开(公告)日：1988-11-22

申请号：US116791

申请日：1987-11-05

申请人： Tsuyoshi Ootani ,  Junsaku Nakajima ,  Chiaki Abe ,  Ikuko Wada

发明人： Tsuyoshi Ootani ,  Junsaku Nakajima ,  Chiaki Abe ,  Ikuko Wada

IPC分类号： C09C1/48 ,  C09D5/23 ,  C09D7/12 ,  C10M103/02 ,  C10M105/34 ,  C10N20/06 ,  C10N40/18 ,  G11B5/702 ,  G11B5/708 ,  G11B5/71

CPC分类号： G11B5/708 ,  G11B5/7023 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/30 ,  Y10T428/31609 ,  Y10T428/31935

摘要： Disclosed is a magnetic recording medium having a magnetic layer composed mainly of a magnetic powder and a resin binder, wherein the magnetic layer comprises (a) an ester compound comprising (a-1) an ester compound represented by the following formula (1): ##STR1## wherein R stands for a branched alkyl group having 13 carbon atoms,(a-2) butyl stearate and (a-3) butoxyethyl stearate, and (b) carbon black comprising (b-1) carbon black having an average single particle size of 10 to 50 m.mu. and (b-2) carbon black having an average single particle size of 200 to 1,000 m.mu..This magnetic recording medium has an excellent durability and is utilized as a floppy disk or the like.

公开(公告)号：US20120327755A1

公开(公告)日：2012-12-27

申请号：US13565266

申请日：2012-08-02

申请人： Takashi Arimoto ,  Go Mori ,  Junsaku Nakajima ,  Shigemi Maeda

发明人： Takashi Arimoto ,  Go Mori ,  Junsaku Nakajima ,  Shigemi Maeda

IPC分类号： G11B7/24 ,  G11B7/004

CPC分类号： G11B7/00736 ,  G11B7/24038 ,  G11B27/105 ,  G11B2007/0013 ,  G11B2020/1247 ,  G11B2020/1259 ,  G11B2220/211 ,  G11B2220/235 ,  G11B2220/237 ,  G11B2220/2541

摘要： Disclosed is an information recording medium which, when inserted into a recording/reproducing device, can be run in an updated state intended by a disc supplier since a recordable layer can be specified as a layer to be run first. For example, in an optical disc including an L1 layer which is a read-only recording layer and an L0 layer which is a recordable layer, layer specifying information for specifying the L0 layer in priority to the L1 layer is recorded as an information recording layer to be run first when the optical disc is inserted into the optical disc device which carriers out recording or reproduction of information with respect to the optical disc.

摘要翻译： 公开了一种信息记录介质，当插入到记录/再现装置中时，可以以盘供应商预期的更新状态运行，因为可记录层可以被指定为首先运行的层。 例如，在包括作为只读记录层的L1层和作为可记录层的L0层的光盘中，记录了用于指定L1层优先级的L0层的层指定信息作为信息记录层 当光盘被插入到相对于光盘的信息的记录或再现的光盘装置中时，首先运行。

公开(公告)号：US20120127840A1

公开(公告)日：2012-05-24

申请号：US13383991

申请日：2010-07-20

申请人： Takashi Arimoto ,  Go Mori ,  Junsaku Nakajima ,  Shigemi Maeda

发明人： Takashi Arimoto ,  Go Mori ,  Junsaku Nakajima ,  Shigemi Maeda

IPC分类号： G11B7/24 ,  G11B7/007

CPC分类号： G11B7/00736 ,  G11B7/24038 ,  G11B27/105 ,  G11B2007/0013 ,  G11B2020/1247 ,  G11B2020/1259 ,  G11B2220/211 ,  G11B2220/235 ,  G11B2220/237 ,  G11B2220/2541

摘要： In an optical disc (100) having a plurality of recording layers, layer specifying information is recorded for specifying a recording layer to be run first when the optical disc (100) is inserted into an optical disc device (1) which carries out recording or reproduction of information with respect to the optical disc (100). Therefore, a recording layer intended by at least a disc supplier can be run first. In the optical disc (100) including an L1 layer which is a read-only recording layer and an L0 layer which is a recordable layer, layer specifying information for specifying the L0 layer in priority to the L1 layer is recorded as the information recording layer to be run first when the optical disc (100) is inserted into the optical disc device (1) which carries out recording or reproduction of information with respect to the optical disc (100).

摘要翻译： 在具有多个记录层的光盘（100）中，当将光盘（100）插入执行记录的光盘装置（1）中时，记录指定要首先运行的记录层的层指定信息，或 再现关于光盘（100）的信息。 因此，可以首先运行至少由盘供应商预期的记录层。 在包括作为只读记录层的L1层和作为可记录层的L0层的光盘（100）中，记录了用于指定L1层优先级的L0层的层指定信息作为信息记录层 当将光盘（100）插入到执行关于光盘（100）的信息的记录或再现的光盘装置（1）中时，首先运行。

公开(公告)号：US07580329B2

公开(公告)日：2009-08-25

申请号：US11339759

申请日：2006-01-24

申请人： Junsaku Nakajima ,  Hitoshi Takeuchi ,  Masaru Nomura ,  Kenji Ohta

发明人： Junsaku Nakajima ,  Hitoshi Takeuchi ,  Masaru Nomura ,  Kenji Ohta

IPC分类号： G11B7/00

CPC分类号： G11B20/00688 ,  G11B7/005 ,  G11B7/007 ,  G11B7/24085 ,  G11B20/00086

摘要： An optical disk has a lead-in region provided at the inner circumference side and a user region provided at the outer circumference side. Pit string 3 of pits of different depths is formed in the lead in region. Light beam reflected from the pit string is detected by detector and TPP and RF signals are output by differential amplifier and addition amplifier. A ternary signal is restored from pits based on the TPP and RF signals. Information is recorded by pits of the same depth in the user region. Recording information in the depth direction in the lead-in region increases the recording capacity thereof. The information recorded in the depth direction in the lead-in region cannot be transferred to a user region of another optical disk.

摘要翻译： 光盘具有设置在内周侧的引入区域和设置在外周侧的用户区域。 在引导区域中形成具有不同深度的凹坑的凹坑串3。 通过检测器检测从凹坑串反射的光束，TPP和RF信号由差分放大器和相加放大器输出。 基于TPP和RF信号从凹坑恢复三态信号。 信息由用户区域中相同深度的凹坑记录。 在导入区域中沿深度方向记录信息增加其记录容量。 在导入区域中沿深度方向记录的信息不能传送到另一个光盘的用户区域。

公开(公告)号：US07050383B2

公开(公告)日：2006-05-23

申请号：US09824554

申请日：2001-04-02

申请人： Junsaku Nakajima ,  Hitoshi Takeuchi ,  Masaru Nomura ,  Kenji Ohta

发明人： Junsaku Nakajima ,  Hitoshi Takeuchi ,  Masaru Nomura ,  Kenji Ohta

IPC分类号： G11B7/00

CPC分类号： G11B20/00688 ,  G11B7/005 ,  G11B7/007 ,  G11B7/24085 ,  G11B20/00086

摘要： An optical disk has a lead-in region provided at the inner circumference side and a user region provided at the outer circumference side. Pit string 3 of pits of different depths is formed in the lead-in region. Light beam reflected from the pit string is detected by detector and TPP and RF signals are output by differential amplifier and addition amplifier. A ternary signal is restored from pits based on the TPP and RF signals. Information is recorded by pits of the same depth in the user region. Recording information in the depth direction in the lead-in region increases the recording capacity thereof. The information recorded in the depth direction in the lead-in region cannot be transferred to a user region of another optical disk.

公开(公告)号：US06532208B2

公开(公告)日：2003-03-11

申请号：US09903065

申请日：2001-07-10

申请人： Junsaku Nakajima

发明人： Junsaku Nakajima

IPC分类号： G11B724

CPC分类号： G11B7/00718 ,  G11B7/007 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/0941 ,  G11B7/24085 ,  G11B11/10578

摘要： In an optical recording medium in which marks are allowed to be written at grooves and information has been recorded beforehand in the form of prepits, the depth of the grooves, Dg, and the depth of the prepits, Dp, satisfy the following relationships, respectively: Dg

摘要翻译： 在允许以凹槽写入标记的光记录介质中，预先以预凹坑的形式预先记录了信息，凹槽的深度Dg和预凹坑的深度Dp分别满足以下关系： ：lambd是用于记录/再现信息信号的光的波长，n是光记录介质的基板的折射率。

公开(公告)号：US20070177489A1

公开(公告)日：2007-08-02

申请号：US11339759

申请日：2006-01-24

申请人： Junsaku Nakajima ,  Hitoshi Takeuchi ,  Masaru Nomura ,  Kenji Ohta

发明人： Junsaku Nakajima ,  Hitoshi Takeuchi ,  Masaru Nomura ,  Kenji Ohta

IPC分类号： G11B7/00

CPC分类号： G11B20/00688 ,  G11B7/005 ,  G11B7/007 ,  G11B7/24085 ,  G11B20/00086

摘要： An optical disk has a lead-in region provided at the inner circumference side and a user region provided at the outer circumference side. Pit string 3 of pits of different depths-is-formed-in-the-lead-in-region. Light beam reflected from the pit string is detected by detector and TPP and RF signals are output by differential amplifier and addition amplifier. A ternary signal is restored from pits based on the TPP and RF signals. Information is recorded by pits of the same depth in the user region. Recording information in the depth direction in the lead-in region increases the recording capacity thereof The information recorded in the depth direction in the lead-in region cannot be transferred to a user region of another optical disk.

摘要翻译： 光盘具有设置在内周侧的引入区域和设置在外周侧的用户区域。 不同深度的坑的第3个坑的区域中的铅。 通过检测器检测从凹坑串反射的光束，TPP和RF信号由差分放大器和相加放大器输出。 基于TPP和RF信号从凹坑恢复三态信号。 信息由用户区域中相同深度的凹坑记录。 在导入区域中的深度方向的记录信息增加了记录容量。在导入区域中记录在深度方向上的信息不能传送到另一个光盘的用户区域。

公开(公告)号：US06728183B1

公开(公告)日：2004-04-27

申请号：US09512558

申请日：2000-02-24

申请人： Hitoshi Takeuchi ,  Junsaku Nakajima

发明人： Hitoshi Takeuchi ,  Junsaku Nakajima

IPC分类号： G11B7125

CPC分类号： G11B7/126 ,  G11B7/00454

摘要： An optical device to control the output power of a laser on recording and reproduction without expensive high-speed circuits is provided. The optical disk device of the present invention comprises monitor portion for monitoring the power of laser light, averaged light quantity calculating portion for calculating the averaged light quantity of the power of the laser light, memory portion for memorizing the averaged light quantity, error quantity calculated portion for calculating the difference between the output signals of the averaged light quantity calculating portion and the memory portion, and laser power control portion for controlling the power of the laser light in response to the output signal from the error quantity calculating portion.

摘要翻译： 提供了一种用于在没有昂贵的高速电路的情况下在记录和再现时控制激光器的输出功率的光学装置。 本发明的光盘装置包括用于监视激光功率的监视部分，用于计算激光功率的平均光量的平均光量计算部分，用于存储平均光量的存储部分，计算出的误差量 用于计算平均光量计算部分和存储器部分的输出信号之间的差的部分，以及用于响应于来自误差量计算部分的输出信号来控制激光功率的激光功率控制部分。