公开(公告)号：US06885628B2

公开(公告)日：2005-04-26

申请号：US09730344

申请日：2000-12-05

申请人： Keiichi Tsutsui ,  Atsushi Fukumoto ,  Masayuki Arai ,  Katsuhisa Aratani

发明人： Keiichi Tsutsui ,  Atsushi Fukumoto ,  Masayuki Arai ,  Katsuhisa Aratani

IPC分类号： G11B7/24 ,  G06F3/06 ,  G11B7/007 ,  G11B11/105 ,  G11B20/12

CPC分类号： G06F3/0607 ,  G06F3/0632 ,  G06F3/0644 ,  G06F3/0677 ,  G11B7/007 ,  G11B11/10582 ,  G11B11/10597 ,  G11B20/1258 ,  G11B2020/1267 ,  G11B2020/1292 ,  G11B2220/235 ,  G11B2220/2525 ,  Y10T428/21

摘要： A recording and reproduction apparatus using a plurality of generations of optical recording media and an optical recording medium used in such a recording and reproduction apparatus, wherein the optical recording medium comprises first and second recording areas, the first recording area is divided into a plurality of zones, each of the plurality of zones is divided into a plurality of divided areas of one type among a plurality of types set in advance, the plurality of divided areas are assigned addresses and have fixed recording capacities, and identification information indicating the one type is recorded in the second recording area. The apparatus focuses a laser beam on the second recording area to read the identification information and records information on the first recording area or detects recorded information of the first recording area based on the identification information. The optical recording medium is for example a magneto-optical disk.

公开(公告)号：US20050002626A1

公开(公告)日：2005-01-06

申请号：US10834981

申请日：2004-04-30

申请人： Makoto Watanabe ,  Atsushi Fukumoto ,  Michio Oka

发明人： Makoto Watanabe ,  Atsushi Fukumoto ,  Michio Oka

IPC分类号： G02B26/08 ,  G02B6/00 ,  G02B6/02 ,  G02B6/38 ,  G02B27/18 ,  G02B6/20

CPC分类号： G02B6/02347 ,  G02B6/02338 ,  G02B6/3855

摘要： A photonic crystal fiber has a configuration in which a multiplicity of voids are arranged along the longitudinal direction of the fiber and with a regular sectional structure, a terminal end portion of the fiber is fusion bond sealed with a fusing material composed of a glass lower than a light propagation medium of the fiber in softening temperature, and the terminal end portion is connected to a ferrule with the fusing material. With this configuration, it is possible to obviate the lowerings in optical characteristics such as a large refractive index difference between the light propagation medium and the voids, a high light transmission efficiency, a high numerical aperture, etc., and to obviate such problems as the penetration of foreign matter into the inside of the voids, a burning failure arising from a positional staggering of the ferrule, etc.

摘要翻译： 光子晶体光纤具有沿着纤维的长度方向配置多个空隙的构造，并且具有规则的截面结构，纤维的末端部分用由低于 软化温度下的纤维的光传播介质，并且末端部利用熔融材料与套圈连接。 通过这种结构，能够消除光传播介质和空隙之间的大的折射率差，高透光效率，高数值孔径等的光学特性的下降，并且消除诸如 异物渗透到空隙的内部，由于套圈的位置交错引起的燃烧故障等

公开(公告)号：US06775221B1

公开(公告)日：2004-08-10

申请号：US09695665

申请日：2000-10-24

申请人： Atsushi Fukumoto

发明人： Atsushi Fukumoto

IPC分类号： G11B700

CPC分类号： G11B7/00718 ,  G11B7/094 ,  G11B7/0943

摘要： An optical pickup provided with a semiconductor laser for outputting a linear polarized laser beam, an objective lens for condensing a laser beam from the semiconductor laser and supplying the same to a track of an optical disk with lands and/or grooves formed therein, a polarization plate supplied with the laser beam reflected at the optical disk via the objective lens and a beam splitter, and changing an overlapping region in which a 0-th order diffraction light and a 1st order diffraction light contained in the supplied laser beam overlap and a nonoverlapping region to linear polarized light orthogonal or substantially orthogonal to each other, and a photo detector supplied with the laser beam passed through the polarization plate via a focus lens and a cylindrical lens.

摘要翻译： 一种设置有用于输出线性偏振激光束的半导体激光器的光学拾取器，用于聚集来自半导体激光器的激光束并将其提供给其中形成有平台和/或沟槽的光盘的轨道的物镜，偏振 提供有通过物镜在光盘上反射的激光束的光盘和分束器，并且改变所提供的激光束中包含的0级衍射光和1级衍射光重叠的重叠区域和不重叠 正交或基本上正交的线偏振光，以及提供有通过聚焦透镜和柱面透镜通过偏振板的激光束的光电检测器。

公开(公告)号：US06587882B1

公开(公告)日：2003-07-01

申请号：US09128012

申请日：1998-08-03

申请人： Atsushi Inoue ,  Masahiro Ishiyama ,  Atsushi Fukumoto ,  Yoshiyuki Tsuda

发明人： Atsushi Inoue ,  Masahiro Ishiyama ,  Atsushi Fukumoto ,  Yoshiyuki Tsuda

IPC分类号： G06F1516

CPC分类号： H04W8/06 ,  H04L61/2015 ,  H04W8/065 ,  H04W8/26 ,  H04W48/16 ,  H04W80/04

摘要： A mobile IP communication scheme in which a visited site or nearby network of a mobile computer is utilized as a temporal home network of a mobile computer. The mobile computer exchanges a message with a mobile computer management device provided in a visited site or nearby network from a visited site, so as to acquire a network configuration information of the visited site or nearby network, and sets the acquired network configuration information in a communication program to be used in carrying out communications. The mobile computer management device leases a temporal home address to be used by an externally located mobile computer in response to a request message from the mobile computer, and registers the mobile computer as a mobile node which regards a network to which the mobile computer management device belongs as a home network, in response to a registration message from the mobile computer.

摘要翻译： 移动IP通信方案，其中移动计算机的访问站点或附近网络被用作移动计算机的时间归属网络。 移动计算机与被访问站点或附近网络中提供的移动计算机管理装置从访问站点交换消息，以获取访问站点或附近网络的网络配置信息，并将所获取的网络配置信息设置为 通信程序用于进行通信。 移动计算机管理装置响应于来自移动计算机的请求消息租用外部定位的移动计算机使用的时间归属地址，并将移动计算机注册为移动节点，移动节点将移动计算机管理装置 作为归属网络，响应于来自移动计算机的注册消息。

公开(公告)号：US06493296B1

公开(公告)日：2002-12-10

申请号：US09431839

申请日：1999-11-02

申请人： Atsushi Fukumoto ,  Shinichi Kai

发明人： Atsushi Fukumoto ,  Shinichi Kai

IPC分类号： G11B7095

CPC分类号： G11B7/0956 ,  G11B7/0903

摘要： An optical disc inclination detecting method for detecting an inclination angle of an optical disc with respect to a light spot, for recording information or reproducing information by irradiating the light spot on the optical disc by an optical pickup. The method includes dividing the light spot into a main spot and both side spots in a specified track and track crossing directions before and after the specified track, detecting signals corresponding to a reflected light from the optical disc by photo detectors corresponding to the main spot and both side spots, and generating a DPP (differential push-pull) signal from signals corresponding to the main spot and both side spots. The method also generates a DPD (differential phase direction) signal by comparing phases from the signals corresponding to the main spot, determining a differential operation value of the DPP and DPD signals, and detecting the inclination angle of the optical disc based on the differential operation value.

摘要翻译： 一种光盘倾斜检测方法，用于检测光盘相对于光点的倾斜角度，用于通过光学拾取器照射光盘上的光点来记录信息或再现信息。 该方法包括将光斑划分成主光点和在指定轨迹之前和之后的指定轨迹和轨迹交叉方向上的两个侧光点，通过与主光点相对应的光电检测器检测对应于来自光盘的反射光的信号，以及 并且从与主点和两个侧面点对应的信号产生DPP（差分推挽）信号。 该方法还通过比较来自与主光点相对应的信号的相位来确定DPP和DPD信号的差分运算值，以及基于差分运算来检测光盘的倾斜角度来生成DPD（差分相位方向）信号 值。

公开(公告)号：US06434108B1

公开(公告)日：2002-08-13

申请号：US08564639

申请日：1995-11-29

申请人： Yutaka Kasami ,  Koichi Yasuda ,  Atsushi Fukumoto

发明人： Yutaka Kasami ,  Koichi Yasuda ,  Atsushi Fukumoto

IPC分类号： G11B724

CPC分类号： G11B7/00718 ,  G11B7/24076 ,  G11B7/24079 ,  G11B11/10578 ,  G11B11/10584

摘要： An optical disc on or from which information signals are recorded/reproduced by irradiation of a laser light beam is disclosed. The optical disc has a plurality of top surfaces, a plurality of bottom surfaces, and a plurality of portions formed on a major surface of a disc substrate of the optical disc. The portions separate the top and bottom surfaces from each other. A recording track is constituted by each top surface and each bottom surface. Each bottom surface and each top surface have a first width, while each portion has a second width. The recording track has a track pitch P defined by the sum of the first width and said second pitch. The pitch is related with the second width and the spot diameter of the playback light &phgr; by a formula and P

摘要翻译： 公开了通过激光束的照射来记录/再现信息信号的光盘。 光盘具有多个顶表面，多个底表面和形成在光盘的盘基片的主表面上的多个部分。 这些部分将顶部和底部表面彼此分开。 记录轨道由每个顶表面和每个底表面构成。 每个底表面和每个顶表面具有第一宽度，而每个部分具有第二宽度。 记录轨道具有由第一宽度和所述第二间距之和定义的轨道间距P. 间距与回放光phi的第二宽度和光斑直径相关，P

公开(公告)号：US06421304B1

公开(公告)日：2002-07-16

申请号：US09551428

申请日：2000-04-18

申请人： Shunji Yoshimura ,  Atsushi Fukumoto ,  Shinichi Kai

发明人： Shunji Yoshimura ,  Atsushi Fukumoto ,  Shinichi Kai

IPC分类号： G11B1100

CPC分类号： G11B11/10515 ,  G11B20/10009

摘要： A magneto-optical reproducing apparatus for reproducing from a magnetic film medium having at least a displacement layer, a switching layer, and a memory layer. A magnetic wall displacement is generated in the displacement layer in any region where the temperature exceeds the Curie temperature of the switching layer to effectively enlarge any recorded magnetic domain. The reproduced signal from the magnetic film medium is equalized with regard to waveform in an equalizer circuit and then fed to a magnetic wall displacement detection circuit that produces a magnetic wall displacement signal by using a differential signal or a secondary differential signal of the reproduced signal so as to provide a low bit error rate despite any sudden DC level variation in the reproduced signal.

摘要翻译： 一种用于从至少具有位移层，开关层和存储层的磁性膜介质再现的磁光再现装置。 在温度超过开关层的居里温度的任何区域中的位移层中产生磁性壁位移，以有效地扩大任何记录的磁畴。 来自磁性膜介质的再现信号相对于均衡器电路中的波形而均衡，然后馈送到通过使用再现信号的差分信号或次级差分信号产生磁性壁位移信号的磁性壁位移检测电路， 以便尽管再现信号中的任何突然的DC电平变化都提供低的误码率。

公开(公告)号：US06167513A

公开(公告)日：2000-12-26

申请号：US962332

申请日：1997-10-31

申请人： Atsushi Inoue ,  Masahiro Ishiyama ,  Atsushi Fukumoto ,  Yoshiyuki Tsuda ,  Atsushi Shimbo ,  Toshio Okamoto

发明人： Atsushi Inoue ,  Masahiro Ishiyama ,  Atsushi Fukumoto ,  Yoshiyuki Tsuda ,  Atsushi Shimbo ,  Toshio Okamoto

IPC分类号： G06F21/20 ,  G06F13/00 ,  H04L9/32 ,  H04L29/06 ,  H04K1/00

CPC分类号： H04L63/0428 ,  H04L63/08 ,  H04W80/04

摘要： A mobile computing scheme capable of carrying out a proper packet transfer according to a current location of the mobile computer by accounting for the network operating policy. A mobile computer carries out a prescribed communication processing according to recognition results as to whether the mobile computer is located inside or outside the home network at which a mobile computer management device of the mobile computer is provided, and whether or not there exists a packet processing device which has a packet transmitted by at least one of the mobile computer and a correspondent computer as an encryption and authentication processing target. Also, a packet processing device carries out a prescribed transfer processing according to recognition results as to whether at least one of a source computer and a destination computer of a packet to be transferred is a moving mobile computer which is moving outside its home network, and whether or not there exists a packet processing device which has a packet transmitted by at least one of the source computer and the destination computer as an encryption and authentication processing target.

摘要翻译： 一种移动计算方案，其能够通过计算网络操作策略来根据移动计算机的当前位置来执行适当的分组传送。 移动计算机根据关于移动计算机是位于移动计算机的移动计算机管理装置的家庭网络内部还是外部的识别结果进行规定的通信处理，以及是否存在分组处理 装置，其具有由至少一个移动计算机和对应计算机发送的分组作为加密和认证处理目标。 此外，分组处理装置根据识别结果来执行规定的传送处理，以确定要传送的分组的源计算机和目的地计算机中的至少一个是移动到家庭网络之外的移动移动计算机，以及 是否存在具有由源计算机和目的地计算机中的至少一个发送的分组作为加密和认证处理目标的分组处理设备。

公开(公告)号：US5764606A

公开(公告)日：1998-06-09

申请号：US762448

申请日：1996-12-09

申请人： Atsushi Fukumoto ,  Motoi Kimura ,  Yoshiaki Kato

发明人： Atsushi Fukumoto ,  Motoi Kimura ,  Yoshiaki Kato

IPC分类号： G11B11/10 ,  G11B7/09 ,  G11B7/095 ,  G11B11/105

CPC分类号： G11B7/0903 ,  G11B2007/0013 ,  G11B7/094

摘要： In a three-spot tracking control system for a multi-layer optical disc, stray light of the signal-reproducing main beam from a layer other than the layer being reproduced leaks into first and second photodetectors receiving the reflected beam of two auxiliary tracking controlling beams to render the tracking operation unstable. In order to overcome this drawback, a first photodetector detects one auxiliary reflected beam from one or the other of the information signal layers of a double-layer optical disc. The second photodetector detects the other reflected auxiliary beam from the information signal layer. A first upper envelope detector detects the upper envelope signal of the reflected auxiliary beam. A second upper envelope detector detects the upper envelope signal of the detection signal of the other reflected auxiliary beam. A first subtractor subtracts the detected output by the first upper envelope detector 6 from the detection signal of the first photodetector. A second subtractor subtracts the detected output by the second upper envelope detector from the detection signal of the second photodetector. A third subtractor performs subtraction between outputs of the first subtractor and the second subtractor.

摘要翻译： 在用于多层光盘的三点跟踪控制系统中，来自再生层以外的层的信号再现主光束的杂散光泄漏到接收两个辅助跟踪控制光束的反射光束的第一和第二光电检测器 以使跟踪操作不稳定。 为了克服这个缺陷，第一光电检测器检测来自双层光盘的信息信号层中的一个或另一个的一个辅助反射光束。 第二光电检测器从信息信号层检测另一反射辅助光束。 第一上包络检测器检测反射的辅助光束的上包络信号。 第二上包络检测器检测另一反射辅助光束的检测信号的上包络信号。 第一减法器从第一光检测器的检测信号中减去第一上包络检测器6的检测输出。 第二减法器从第二上包络检测器从第二光电探测器的检测信号中减去检测输出。 第三减法器在第一减法器和第二减法器的输出之间执行减法。

公开(公告)号：US5579294A

公开(公告)日：1996-11-26

申请号：US299544

申请日：1994-09-01

申请人： Masumi Ohta ,  Isamu Nakao ,  Toshiki Udagawa ,  Atsushi Fukumoto ,  Shunji Yoshimura

发明人： Masumi Ohta ,  Isamu Nakao ,  Toshiki Udagawa ,  Atsushi Fukumoto ,  Shunji Yoshimura

IPC分类号： G11B11/105 ,  G11B19/12 ,  G11B7/00

CPC分类号： G11B11/10597 ,  G11B11/10515 ,  G11B11/10586 ,  G11B19/12

摘要： An apparatus for recording and/or reproducing a magneto-optical recording medium having a recording layer, a reproducing layer and an intermediate layer for magnetically coupling the recording layer and the reproducing layer in a stationary state, in which the magnetic coupling between the recording layer and the reproducing layer is only able to take place in an area in which a temperature is increased to be higher than a predetermined temperature by the radiation of a light upon reproducing and in which a recorded information held in the recording layer is read out from the reproducing layer in the radiated area. This magneto-optical recording medium is characterized in that a Curie temperature of the intermediate layer is selected to be 150.degree. C. or more. Also, an apparatus which performs the above-mentioned functions and additionally which is capable of recording and/or reproducing conventional magneto-optical discs which reproduce and/or record over the entire area of irradiation.

摘要翻译： 一种用于记录和/或再现具有记录层，再现层和中间层的磁光记录介质的装置，用于在静止状态下将记录层和再现层磁耦合，其中记录层 并且再现层仅能够通过再现时的光的辐射而在温度升高到高于预定温度的区域中发生，并且其中记录在记录层中的记录信息从 再现层在辐射区域。 该磁光记录介质的特征在于，中间层的居里温度选择为150℃以上。 此外，还执行上述功能的装置，并且另外能够记录和/或再现在整个照射区域上再现和/或记录的常规磁光盘。