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71. 发明授权

US5657308A Apparatus for recording/reproducing information data in two dimensional format 失效
标题翻译：用于以二维格式记录/再现信息数据的装置
公开(公告)号：US5657308A
公开(公告)日：1997-08-12
申请号：US557319
申请日：1995-11-14
申请人： Takeshi Maeda , Atsushi Saito , Hiroshi Ide
发明人： Takeshi Maeda , Atsushi Saito , Hiroshi Ide
IPC分类号： G11B7/004 , G11B7/013 , G11B7/09 , G11B7/13 , G11B7/135 , G11B7/14 , G11B11/105 , G11B20/14 , G11B7/00
CPC分类号： B82Y10/00 , G11B11/10502 , G11B11/10545 , G11B11/10584 , G11B7/004 , G11B7/0943 , G11B7/133 , G11B7/1365 , G11B20/1496 , G11B7/013 , G11B7/13 , G11B7/14 , G11B7/24088
摘要： In an information recording/reproducing apparatus constructed of: a buffer for storing therein consecutive recording data in a unit of two dimensional conversion; a coding device for converting the consecutive recording data into a two-dimensional data arrangement arranged by "n" lines and "m" columns corresponding to said unit of data; a recording device for subdividing said two-dimensional data arrangement arranged by "n" lines and "m" columns so as to be read out, and for controlling "m" pieces of light sources in accordance with these data series; and an optical apparatus for converging luminous fluxes from said "m" pieces of light sources so as to form "m" pieces of spots on a disk plane, the recording data is recorded on the disk plane as an optically distringuishable pit group having two-dimensionally extended areas arranged by "n" lines and "m" columns. During a reproducing operation, the reflected light is detected by "m" pieces of detectors; "m" columns of one-dimensional data series are generated from the reflected light detected by these detectors in a generator; and also consecutive data is reproduced from the two dimensional data arranged by "n" lines and "m" columns in a decoder.
摘要翻译：一种信息记录/再现装置，由以下部分构成：用于以二维转换为单位在其中存储连续的记录数据的缓冲器; 编码装置，用于将连续的记录数据转换为由对应于所述数据单元的“n”行和“m”列排列的二维数据排列; 用于细分由“n”行和“m”列布置的所述二维数据排列以便被读出的记录装置，并且用于根据这些数据序列控制“m”个光源; 以及用于会聚来自所述“m”个光源的光通量以便在盘平面上形成“m”个点的光学装置，所述记录数据被记录在盘平面上，作为具有二维图形的光学可区分凹坑组，由“n”行和“m”列排列的三维延伸区域。在再现操作期间，由“m”个检测器检测反射光; 从发生器中由这些检测器检测到的反射光产生“m”列的一维数据序列; 并且从解码器中由“n”行和“m”列排列的二维数据再现连续的数据。

72. 发明授权

US5625388A Overwritable optical recording medium and recording method of the same 失效
标题翻译：可覆写光记录介质及其记录方法
公开(公告)号：US5625388A
公开(公告)日：1997-04-29
申请号：US126766
申请日：1993-09-27
申请人： Takeshi Maeda , Masahiko Takahashi
发明人： Takeshi Maeda , Masahiko Takahashi
IPC分类号： G11B7/013 , G11B11/105 , G01D9/00
CPC分类号： G11B7/24085 , G11B11/10519 , G11B11/10528 , G11B11/10543
摘要： A recording mark having width (disk radius direction) larger than length (disk rotation direction) is formed by using the light intensity modulation method. The recording mark is ring-shaped. The ring part differs in optical characteristic from a part surrounded by the ring part. In order to form a ring-shaped mark, laser light having predetermined intensity is continuously radiated onto the recording medium. By modulating the intensity of the laser light, information is overwritten. The ring-shaped mark is set to have a width based upon the intensity of radiated laser light and the characteristic of the recording film.
摘要翻译：通过使用光强调制方法形成宽度（盘半径方向）大于长度（盘旋转方向）的记录标记。录音标记是环形的。环形部分的光学特性与由环形部分包围的部分不同。为了形成环状标记，将具有预定强度的激光连续照射到记录介质上。通过调制激光的强度，信息被覆盖。环形标记被设定为具有基于照射激光的强度和记录膜的特性的宽度。

73. 发明授权

US5214629A Optical disc having a high-speed access capability and reading apparatus therefor 失效
标题翻译：具有高速存取能力的光盘及其读取装置
公开(公告)号：US5214629A
公开(公告)日：1993-05-25
申请号：US484409
申请日：1990-02-26
申请人： Hitoshi Watanabe , Takeshi Maeda
发明人： Hitoshi Watanabe , Takeshi Maeda
IPC分类号： G11B7/007 , G11B7/085 , G11B7/09 , G11B19/20
CPC分类号： G11B19/20 , G11B7/00745 , G11B7/08529 , G11B7/08541 , G11B7/0938
摘要： An optical disc for a sample servo type optical disc system. Servo areas disposed periodically on each of tracks of the optical disc are sequentially offset relative to those on the adjacent tracks as viewed in the radial direction by a predetermined distance. An apparatus used for signal read-out from the optical disc comprises a circuit for detecting a servo signal originating in servo pits from a detection signal output from a photodetector, a circuit for generating a clock signal synchronized with the servo signal, a counter for outputting a count value representative of the counted clocks at the timing of the servo signal, and a circuit for generating a light spot velocity signal from the count value.
摘要翻译：一种用于样品伺服型光盘系统的光盘。周期性地设置在光盘的每个轨道上的伺服区域相对于在径向方向上观察的相邻轨道上的轨迹顺序偏移预定距离。用于从光盘读出信号的装置包括用于从光电检测器输出的检测信号中检测源自伺服凹坑的伺服信号的电路，用于产生与伺服信号同步的时钟信号的电路，用于输出的计数器表示伺服信号的定时的计数时钟的计数值，以及从该计数值生成光点速度信号的电路。

74. 发明授权

US5109374A Small-sized optical memory device and information processing apparatus utilizing cylindrically shaped information recording medium 失效
标题翻译：小尺寸光学记忆体设备和信息处理设备利用圆柱形信息记录介质
公开(公告)号：US5109374A
公开(公告)日：1992-04-28
申请号：US406519
申请日：1989-09-13
申请人： Yoshito Tsunoda , Hiroshi Yasuoka , Takeshi Maeda
发明人： Yoshito Tsunoda , Hiroshi Yasuoka , Takeshi Maeda
IPC分类号： G11B11/10 , G11B7/00 , G11B7/0025 , G11B7/09 , G11B7/24 , G11B11/105
CPC分类号： G11B11/10584 , G11B11/10552 , G11B11/10556 , G11B11/10576 , G11B7/0025 , G11B7/24 , G11B7/24003
摘要： An optical memory device includes a cylindrically-shaped optical information recording medium and at least one optical head disposed around the information recording medium for irradiating the information recording medium with a light spot for recording or reproduction of information. The optical head has light spot moving means incorporated therein for the irradiation position of the light spot. The recording or reproduction of information is achieved by causing the light spot moving means to perform tracking control so that the light spot follows a desired track in an area within a range of movement of the light spot by the light spot moving means (or an infromation recording zone) in a state in which the relative positional relationship between the optical head and the cylindrically-shaped information recording medium in the direction parallel to the direction of the rotation axis of the information recording medium is fixed, with the optical head being not moved. The device can be constructed so that the position of either the optical head or the cylindrically-shaped information recording medium relative to the other in the direction parallel to the direction of the rotation axis of the information recording medium is mechanically moved, thereby making it possible to cahnge the information recording zone in the range of movement of the light spot by the light spot moving means to another information recording zone.

75. 发明授权

US5084860A Apparatus for optical disc memory with correction pattern and master disc cutting apparatus 失效
标题翻译：具有校正图案和主光盘切割设备的光盘存储器的设备
公开(公告)号：US5084860A
公开(公告)日：1992-01-28
申请号：US551025
申请日：1990-07-11
申请人： Takeshi Maeda , Yoshito Tsunoda , Kazuo Shigematsu , Toshimitsu Kaku
发明人： Takeshi Maeda , Yoshito Tsunoda , Kazuo Shigematsu , Toshimitsu Kaku
IPC分类号： G11B7/007 , G11B7/09 , G11B7/26 , G11B11/105
CPC分类号： G11B7/261 , G11B11/10565 , G11B11/10578 , G11B11/10582 , G11B7/0901 , G11B7/0938 , G11B7/094 , G11B7/24082
摘要： A record carrier having a disc-shaped substrate and a recording layer for optically writing information therein is disclosed which includes a guide groove extended in the rotational direction of the record carrier so that a plurality of revolutions of the guide groove are spaced apart from each other in radial directions of the record carrier, and a pit pattern provided between adjacent guide grooves, at positions arranged at intervals in the above rotational direction, for detecting the deviation of a light spot from the center line between adjacent guide grooves. The recording/reproducing operation for this record carrier is performed in such a manner that the first tracking error signal is detected from diffracted light from the guide groove, the second tracking error signal is detected from the pit pattern, and information is recorded in and reproduced from a land formed between adjacent guide grooves in a state that a tracking operation is performed using the first and second tracking error signals. The second tracking error signal detected from the pit pattern is not affected by the tilting of the record carrier and the movement of the light spot. When a tracking signal obtained by adding the first and second tracking error signals to each other, is used in a closed-loop tracking system, a stable tracking operation can be performed. The polarity of the pit pattern is reversed on every track, and hence a polarity pit having a depth of .lambda./4 (where .lambda. indicates the wavelength of a reproducing light beam) is provided in the record carrier, to reverse the polarity of the second tracking signal on every track on the basis of a signal from the polarity pit.

76. 发明授权

US5073880A Information recording/reproducing method and apparatus 失效
标题翻译：信息记录/再现方法和装置
公开(公告)号：US5073880A
公开(公告)日：1991-12-17
申请号：US285584
申请日：1988-12-16
申请人： Takeshi Maeda , Yoshito Tsunoda
发明人： Takeshi Maeda , Yoshito Tsunoda
IPC分类号： G11B7/09 , G11B11/105 , G11B21/10
CPC分类号： G11B7/0938 , G11B11/10565 , G11B11/10578 , G11B21/106
摘要： Data recording and/or reproduction on or from a recording medium on which tracking signal detection marks are intermittently provided along each track in a pattern wobbling alternately across the track center line with a very small lateral displacement therefrom, wherein data recording area is defined between the tracking signal detection mark. A servo control system for controlling a write/read light spot so as to follow the track with the aid of a tracking signal obtained by detecting the tracking signal detection marks is provided with a low-pass filter circuit having a cut-off frequency lower than the frequency at which the tracking signal detection marks are detected. A data is recorded or reproduced on or from the recording areas of the recording medium while following the track under the control of the servo system. A blank area where data recording is inhibited is provided between the data recording area and the tracking signal detecting mark (prepit) to suppress interference to the data. A particular access prepit pattern which allows track addresses to be at least approximately detected upon passing of the light spot over the track of the recording medium is previously provided together with synchronizing marks in a synchronizing area.

77. 发明授权

US5034940A Information retrieval system with a tracking error threshold compensation of retrieved data and tracking error signals 失效
标题翻译：信息检索系统具有检索数据跟踪误差信号的跟踪误差阈值补偿
公开(公告)号：US5034940A
公开(公告)日：1991-07-23
申请号：US162660
申请日：1988-03-01
申请人： Atsushi Saito , Takeshi Maeda
发明人： Atsushi Saito , Takeshi Maeda
IPC分类号： G11B7/005 , G11B7/013 , G11B7/09 , G11B11/105
CPC分类号： G11B7/0901 , G11B11/10578 , G11B11/10595 , G11B7/005 , G11B7/0938 , G11B7/24085
摘要： As an optical spot (20) is scanned along a recording track (B) it interacts with optical markers (14, 16) disposed at regular intervals along adjacent sides of the track. Each interaction with an optical marker causes a peak value which is sampled and held (74, 76). A clock (46) derives a clock signal from the regular periodicity of the optical markers. A logic circuit (48) controls the sample and hold circuits such that the peak amplitude attributable to each optical marker is temporarily held. An adder (52) combines peak values attributable to optical markers on opposite sides of the track to produce a threshold signal (100) indicative of a sum or average thereof. A comparator (58) compares data (56) read from the track with the threshold signal. The comparator indicates a "1" level in response to the data signal exceeding a threshold a "0" level in response to the data signal being below the threshold level. A decoder (60) is clocked by the clock pulses to convert the 1 and 0 indications into a binary pulse train. In this manner, the threshold level which distinguishes between 1's and 0's varies or floats in accordance with the relative interaction of the optical beam and the optical markers on one or the other side of the track, i.e. the misalignment of the optical beam and the track. The threshold signal also varies in accordance with variations in the recording medium.

78. 发明授权

US4969137A Optical recording and reproducing apparatus having a multi-spot positioning control mechanism 失效
标题翻译：具有多点定位控制机构的光记录再生装置
公开(公告)号：US4969137A
公开(公告)日：1990-11-06
申请号：US155697
申请日：1988-02-16
申请人： Hisataka Sugiyama , Takeshi Maeda , Atsushi Saito , Fumio Hara
发明人： Hisataka Sugiyama , Takeshi Maeda , Atsushi Saito , Fumio Hara
IPC分类号： G11B7/085 , G11B7/09 , G11B7/12 , G11B7/14
CPC分类号： G11B7/14 , G11B7/08517 , G11B7/08529 , G11B7/08547 , G11B7/12 , G11B7/0901 , G11B7/0912
摘要： In optically coupling a plurality of light sources to an optical system for focusing light beams from the light sources into spots on a record plane, a center axis of a light beam from a first one of the light sources is aligned to an optical axis of the focusing optical system, and the spots other than a first spot formed by the light beam from the first light source are rotated around the first spot on the record plane to position the spots to the respective target tracks, and a tracking error signal for at least one of the first spot and another spot is detected and the positions of the plurality of spots are integrally controlled based on the detected tracking error signal so that the plurality of spots can follow the respective target tracks. The target tracks to which the spots are to be positioned may be either one track or different tracks. The positioning of the spots to the target tracks may be done either manually or automatically. In the automatic method, a tracking error signal is detected for the first spot, and a deflection mechanism for radially swinging beams from the laser light sources is controlled to control the positions of the spots on the record plane and to cause the first spot to follow the target track.
摘要翻译：在将多个光源光学耦合到用于将来自光源的光束聚焦到记录平面上的光点的光学系统中，来自第一个光源的光束的中心轴线与光源的光轴对齐聚焦光学系统，并且除了由来自第一光源的光束形成的第一光斑之外的光点围绕记录平面上的第一光点旋转，以将光斑定位到各个目标轨道，并且至少跟踪误差信号根据检测到的跟踪误差信号检测第一点和另一个点之一，并且多个点的位置被一体地控制，使得多个点可以跟随相应的目标轨道。斑点要被定位到的目标轨道可以是一个轨道或不同的轨道。斑点到目标轨迹的定位可以手动或自动完成。在自动方法中，对于第一点检测跟踪误差信号，并且控制用于从激光光源径向摆动的光束的偏转机构，以控制记录平面上的点的位置并使第一点跟随目标轨道。

79. 发明授权

US4541083A For jumping a light spot on a track of a recording medium 失效
标题翻译：用于在记录介质的轨道上跳过光斑
公开(公告)号：US4541083A
公开(公告)日：1985-09-10
申请号：US446251
申请日：1982-12-02
申请人： Takeshi Maeda , Motoo Uno , Masahiro Takasago
发明人： Takeshi Maeda , Motoo Uno , Masahiro Takasago
IPC分类号： G11B7/085 , G11B21/10
CPC分类号： G11B7/08505
摘要： In a light spot control signal generating device, a light spot is irradiated on a recording medium having tracks on which information is recorded. In order to jump the light spot from a track being scanned thereby to an adjacent track, a signal representative of light quantity of reflection or transmission of the light spot and a track error signal are detected. The two signals are used to judge whether the light spot has passed through an edge of the track. The track error signal is also used to detect a signal representative of an instant at which the light spot is present at the middle point between adjacent tracks, and this signal is used as a timing signal for changing the polarity of a control signal applied to a spot light deflector.
摘要翻译：在光点控制信号发生装置中，将光点照射在具有记录有信息的轨迹的记录介质上。为了将光点从被扫描的轨道跳转到相邻的轨道，检测表示光点的反射或透射的光量的信号和轨道误差信号。这两个信号用于判断光点是否已通过轨道的边缘。轨道误差信号还用于检测表示在相邻轨道之间的中点存在光点的时刻的信号，并且该信号用作定时信号，用于改变施加到一个或多个的控制信号的极性点光偏转器

80. 发明授权

US4293944A Information play-back apparatus with astigmatic auto-focusing 失效
标题翻译：具有散光自动对焦的信息播放装置
公开(公告)号：US4293944A
公开(公告)日：1981-10-06
申请号：US810166
申请日：1977-06-27
申请人： Morishi Izumita , Takeshi Maeda , Yoshito Tsunoda , Susumu Sawano
发明人： Morishi Izumita , Takeshi Maeda , Yoshito Tsunoda , Susumu Sawano
IPC分类号： G11B7/0037 , G11B7/09 , G11B7/095 , G11B7/12 , G11B17/00
CPC分类号： G11B7/0037 , G11B7/0909 , G11B7/0953
摘要： Information play-back apparatus comprising a laser source, a recording medium, a photodetector, a first optical system which conducts a laser beam from the laser source to an information track on the recording medium as a read spot, and a second optical system which conducts a reflected laser beam from the information track to the photodetector through an optical element having the unidirectional lens action, said optical element being arranged in a manner to define an angle of about 45 degrees relative to the direction of the information track, and said photodetector having at least four light receiving portions divided symmetrically about two axes such that at least one light receiving portion is in each of the four quadrants formed by two axes, and one of the axes is parallel to the direction of the information track.
摘要翻译：信息回放装置，包括激光源，记录介质，光电检测器，将来自激光源的激光束传导到作为读取点的记录介质上的信息轨道的第一光学系统，以及第二光学系统，通过具有单向透镜作用的光学元件从信息轨道到光电检测器的反射激光束，所述光学元件以相对于信息轨道的方向限定约45度的角度的方式布置，并且所述光电检测器具有至少四个光接收部分围绕两个轴对称地分开，使得至少一个光接收部分在由两个轴形成的四个象限中的每一个中，并且一个轴平行于信息轨道的方向。

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