公开(公告)号：US5034934A

公开(公告)日：1991-07-23

申请号：US297727

申请日：1989-01-17

申请人： Ryuichi Naito ,  Ikuya Kikuchi ,  Yoshihiro Utsumi

发明人： Ryuichi Naito ,  Ikuya Kikuchi ,  Yoshihiro Utsumi

IPC分类号： G11B11/105 ,  G11B19/02 ,  G11B27/19 ,  G11B27/30 ,  G11B27/36

CPC分类号： G11B11/10515 ,  G11B11/10595 ,  G11B11/10597 ,  G11B19/02 ,  G11B27/19 ,  G11B27/3027 ,  G11B27/36 ,  G11B2220/2525

摘要： An opto-magnetic disk unit is constructed so that predetermined areas existing in the front of the unit recording areas can be detected. In addition, at least one of first and second saturation magnetizations are recorded on each of the detected predetermined areas. At the time of reproduction, signal processing on the output of the pickup is performed after a part of the output of the pickup corresponding to the one section of the predetermined area is clamped to a predetermined level. Also at the time of reproduction, gain controlling of a circuit for signal processing the output of the pickup may be performed based on the level difference between the signal read from a first saturation magnetization section and the signal read from a second saturation magnetization section. An opto-magnetic disk is also provided having recording areas including at least one of first and second magnetization saturation levels arranged in the front of the unit recording areas.

摘要翻译： 光盘单元被构造成能够检测存在于单元记录区域的前方的预定区域。 此外，第一和第二饱和磁化中的至少一个被记录在每个检测到的预定区域上。 在再现时，在对应于预定区域的一个部分的拾取器的输出的一部分被钳位到预定水平之后，对拾取器的输出进行信号处理。 另外在再现时，可以基于从第一饱和磁化部分读取的信号和从第二饱和磁化部分读取的信号之间的电平差来执行用于对拾取器的输出进行信号处理的电路的增益控制。 还提供了具有包括布置在单元记录区域的前面的第一和第二磁化饱和度水平中的至少一个的记录区域的光磁盘。

公开(公告)号：US4243848A

公开(公告)日：1981-01-06

申请号：US19596

申请日：1979-03-12

申请人： Yoshihiro Utsumi

发明人： Yoshihiro Utsumi

IPC分类号： H04N5/85 ,  G02B7/28 ,  G11B7/09 ,  G11B7/12

CPC分类号： G11B7/0908 ,  G11B7/0917

摘要： In a video and/or audio disc player wherein a laser beam is focused by an objective on a record disc for scanning same along a spiral information track thereon, a focus control is provided which comprises a converging lens disposed across the path of the information-modulated laser beam. Two or three photodetector elements are disposed on one of the conjugate planes of the converging lens the other of which substantially coincides with a focal plane of the objective. Aligned in the direction in which the successive images of pits on the record disc travel thereover, the photodetector elements produce electrical outputs having a phase relationship representative of the variable distance between record disc and objective. A focus control circuit produces an output signal corresponding to the phase relationship of the outputs from the photodetector elements, for delivery to a drive coil capable of electromagnetically moving the objective toward and away from the record disc for readjustment of the distance therebetween.

摘要翻译： 在其中激光束通过物镜聚焦在记录盘上以沿其上的螺旋信息轨迹进行扫描的视频和/或音频光盘播放器中，提供了一种聚焦控制器，其包括横跨信息 - 调制激光束。 两个或三个光电检测器元件设置在会聚透镜的共轭平面之一上，另一个基本上与物镜的焦平面重合。 在记录盘上的凹坑的连续图像行进的方向上对准，光电检测器元件产生具有代表记录盘和物镜之间的可变距离的相位关系的电输出。 聚焦控制电路产生对应于来自光电检测器元件的输出的相位关系的输出信号，用于传送到能够将物镜电磁地移动到记录盘和远离记录盘的驱动线圈，以重新调整它们之间的距离。

公开(公告)号：US5189651A

公开(公告)日：1993-02-23

申请号：US438932

申请日：1989-10-30

申请人： Yoshihiro Utsumi

发明人： Yoshihiro Utsumi

IPC分类号： G02B27/16 ,  G11B11/105

CPC分类号： G02B27/16 ,  G11B11/10532 ,  G11B11/10576

摘要： A magneto-optical reproducing device in which a reflected light signal from a magneto-optical disk is divided by an astigmatic analyzer. The analyzer both divides the light signal according to linear polarization, for data signal detection, but also introduces astigmatism in one of the divided beams to allow focus detection.

摘要翻译： 一种磁光再现装置，其中来自磁光盘的反射光信号由散光分析器划分。 分析仪根据线性极化对光信号进行分割，用于数据信号检测，但也在其中一条分光束中引入散光，以实现对焦检测。

公开(公告)号：US5497243A

公开(公告)日：1996-03-05

申请号：US187480

申请日：1994-01-28

申请人： Haruyasu Sakata ,  Nobuo Haino ,  Yoshihiro Utsumi

发明人： Haruyasu Sakata ,  Nobuo Haino ,  Yoshihiro Utsumi

IPC分类号： G11B27/02 ,  G11B27/026 ,  G11B27/028 ,  G11B27/034 ,  G11B27/10 ,  G11B27/34 ,  H04N5/781 ,  G11B5/596 ,  G11B7/00 ,  G11B15/18

CPC分类号： G11B27/028 ,  G11B27/026 ,  G11B27/10 ,  G11B27/34 ,  G11B2220/20 ,  G11B2220/2525

摘要： A video disk recorder for executing a real-time edition records desired scenes to a disk while allowing an operator to observe a relay video image that is currently in progress. In response to the generation of a recording command signal, a recording head is set to a recording mode and a disk address of the recording head at that time is stored as a determinate disk address. In response to the generation of a stop command signal, the recording mode is canceled and a disk address of the recording head at that time is stored as a temporary disk address. In the case where a skip command signal is generated during the recording mode, the recording head is moved to the determinate disk address stored at the time of the start of the recording mode. In the case where the skip command signal is generated in a mode other than the recording mode, the recording head is moved to the temporary disk address.

摘要翻译： 用于执行实时版本的视盘记录器将期望的场景记录到磁盘，同时允许操作者观察当前正在进行的中继视频图像。 响应于产生记录命令信号，记录头被设置为记录模式，并且此时记录头的磁盘地址被存储为确定的磁盘地址。 响应于产生停止命令信号，记录模式被取消，并且此时记录头的磁盘地址被存储为临时磁盘地址。 在记录模式期间产生跳过命令信号的情况下，将记录头移动到记录模式开始时存储的确定盘地址。 在以记录模式以外的模式生成跳过命令信号的情况下，将记录头移动到临时磁盘地址。

公开(公告)号：US4631396A

公开(公告)日：1986-12-23

申请号：US504800

申请日：1983-06-16

申请人： Yoshihiro Utsumi

发明人： Yoshihiro Utsumi

IPC分类号： G02B7/28 ,  G01J1/20 ,  G02B7/02 ,  G11B7/085 ,  G11B7/09 ,  G11B7/135 ,  G11B7/1378

CPC分类号： G11B7/0909 ,  G11B7/1378

摘要： A focus error detection device for use with a system for optically recording and reading out information, and which can produce a symmetrical focus error signal with respect to the amount of displacement of the reflecting surface of the recording medium from an in-focus position. A second cylindrical lens whose axial direction is perpendicular to the axial direction of a first cylindrical lens is provided, and lateral magnification between the position of the receiving surface of a photo detector and a conjugate plane, which is located adjacent to the in-focus position of the reflecting surface, is made uniform in each direction. By this feature, the output signal of the photo detector varies in a symmetric manner in both directions from the in-focus position of the reflection surface.

摘要翻译： 一种聚焦误差检测装置，用于与用于光学记录和读出信息的系统一起使用，并且可以产生相对于记录介质的反射表面从对焦位置的位移量的对称聚焦误差信号。 提供了轴向与第一柱面透镜的轴向垂直的第二柱面透镜，并且位于邻近聚焦位置的光电检测器的接收表面的位置和共轭平面之间的横向放大倍率 的反射面在各个方向上均匀。 通过该特征，光检测器的输出信号从反射面的对焦位置沿两个方向以对称的方式变化。

公开(公告)号：US5251199A

公开(公告)日：1993-10-05

申请号：US899883

申请日：1992-06-17

申请人： Yoshihiro Utsumi ,  Yoshiyuki Kakuta

发明人： Yoshihiro Utsumi ,  Yoshiyuki Kakuta

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/125

CPC分类号： G11B7/126

摘要： In an apparatus for detecting an abnormality of an optical system in a reproducing and recording apparatus of an optical recording medium and executing a driving control of a laser diode, detection of abnormality is performed with the optical system set into a de-focusing state. The apparatus has control device for comparing a level of a first detection signal having the level according to the level of first light beam which is led to the optical recording medium and a level of a second detection signal having the level of the second light beam, thereby controlling a driving current. The control device turns off a loop switch of a focusing servo loop of an objective lens, thereby setting the lens into a de-focusing mode, compares the levels of the first and second detection signals after the de-focusing state of the lens by the actuator is obtained, to discriminates whether a ratio of those levels lies within a predetermined range or not; and shuts off the driving current when it is determined that the ratio is out of the predetermined range.

公开(公告)号：US4506149A

公开(公告)日：1985-03-19

申请号：US436792

申请日：1982-10-26

申请人： Yoshihiro Utsumi

发明人： Yoshihiro Utsumi

IPC分类号： G05D3/12 ,  G11B7/09 ,  G11B21/10 ,  G05B1/00

CPC分类号： G11B7/0956 ,  G11B21/106 ,  G11B7/0901 ,  G11B7/094

摘要： A tracking servo signal generating device in a tracking servo control system in a recorded information reading apparatus adapted to deviate an information detecting point in the direction perpendicular to a target recording track on a recording medium in accordance with the tracking servo signal so that the information detecting point accurately traces the recording track, which comprises detecting means for producing a pair of detection signals a difference between which represents amount and/or direction of deviations of the information detecting point from the recording track in the direction perpendicular to the track. The pair of detection signals is processed to produce a first difference between low frequency components of the detection signals and a second difference between envelope components of high frequency components of the detection signals. The first and second differences are mixed to produce the required tracking servo signal, thereby to suppress erroneous components in the resulted tracking servo signal caused by optical and/or mechanical distortions in the recorded information reading apparatus and/or in the recording medium per se.

摘要翻译： 一种记录信息读取装置中的跟踪伺服控制系统中的跟踪伺服信号产生装置，其适用于根据跟踪伺服信号在与记录介质上垂直于目标记录轨道的方向偏离信息检测点，以便信息检测 该点包括用于产生一对检测信号的检测装置，该检测信号的差异表示信息检测点与垂直于轨道的方向上的信息检测点与记录轨道的偏差的量和/或方向。 处理该对检测信号以产生检测信号的低频分量与检测信号的高频分量的包络分量之间的第二差。 混合第一和第二差异以产生所需的跟踪伺服信号，从而抑制由记录信息读取装置和/或记录介质本身中的光学和/或机械失真引起的所产生的跟踪伺服信号中的错误分量。

公开(公告)号：US5233439A

公开(公告)日：1993-08-03

申请号：US577468

申请日：1990-09-04

申请人： Yoshihiro Utsumi

发明人： Yoshihiro Utsumi

IPC分类号： G11B20/02 ,  H04N1/21 ,  H04N5/78 ,  H04N5/783 ,  H04N5/92 ,  H04N5/93

CPC分类号： H04N5/93 ,  H04N1/32117 ,  H04N5/9202 ,  H04N2201/3264 ,  H04N5/7805 ,  H04N5/783 ,  Y10S358/907

摘要： In a disk performance apparatus, an audio signal processor is provided so as to remove the higher components with frequency higher than the prescribed frequency of audio signals included in outputs of a reading device for reading recorded signals of a disk during still or slow picture reproducing and the lower components with frequency lower than that corresponding to the period of the track jump, and incompatibility in the auditory sensation of the reproducing sound is eliminated.

摘要翻译： 在磁盘执行装置中，提供音频信号处理器，以便在静止或慢速图像再现期间用于读取磁盘的记录信号的读取装置的输出中包括的音频信号的规定频率的频率上移除较高分量;以及 频率低于与轨道跳跃周期相对应的低分量，并且消除了再现声音的听觉中的不兼容性。

公开(公告)号：US5051836A

公开(公告)日：1991-09-24

申请号：US371007

申请日：1989-06-26

申请人： Fumihiko Yokogawa ,  Yoshihiro Utsumi

发明人： Fumihiko Yokogawa ,  Yoshihiro Utsumi

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/007 ,  G11B20/02 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  H04N5/85

CPC分类号： G11B7/00745 ,  G11B27/19 ,  G11B27/24 ,  G11B7/0045 ,  H04N5/85 ,  G11B2220/20 ,  G11B2220/2587 ,  G11B27/3027

摘要： An optical disc with pregrooves arranged circumferentially so as to define a track area, and recording method and apparatus using an optical disc of that type. The disc is characterized by horizontal sync signal formed regions in which the pregrooves are formed in an intermittent manner along a circumference. The recording method and apparatus are characterized by performing a recording operation by irradiating a recording light beam modulated by a video format signal on a track area of an optical disc with pregrooves, generating a sync pulse signal having pulses corresponding to the horizontal sync signal forming area, from an electric signal obtained by a photo-electric conversion of a reflection signal from the optical disc, detecting the phase difference between the sync pulse signal and a horizontal sync pulse signal in the video format signal, and delaying the video format signal in accordance with the magnitude of the phase difference.

摘要翻译： 具有周向布置以限定轨道区域的预制槽的光盘，以及使用该类型的光盘的记录方法和装置。 盘的特征在于水平同步信号形成区域，其中沿着圆周以间歇方式形成预槽。 记录方法和装置的特征在于，通过在光盘的轨道区域上照射由视频格式信号调制的记录光束进行记录操作，产生具有对应于水平同步信号形成区域的脉冲的同步脉冲信号 从通过光电转换来自光盘的反射信号获得的电信号，检测视频格式信号中的同步脉冲信号和水平同步脉冲信号之间的相位差，并根据视频格式信号延迟视频格式信号 具有相位差的大小。