-
1.发明授权Optical track position detecting apparatus and optical information processor using the same 失效光轨位置检测装置及使用其的光信息处理器
公开(公告)号：US4525826A
公开(公告)日：1985-06-25
申请号：US402234
申请日：1982-07-27
申请人： Shigeru Nakamura , Yoshito Tsunoda , Kazuo Shigematsu , Toshimitsu Kaku , Takeshi Maeda , Tsuyoshi Kato
发明人： Shigeru Nakamura , Yoshito Tsunoda , Kazuo Shigematsu , Toshimitsu Kaku , Takeshi Maeda , Tsuyoshi Kato
CPC分类号： G11B7/0901 , G11B7/09 , G11B7/0953 , G11B7/12 , G11B7/13
摘要： In an optical information processor such as an optical disc apparatus, when a light beam is irradiated to a plurality of tracks on an information recording medium, the plurality of tracks act as a diffraction grating. Areas in which light receiving parts of a light detector are arranged are determined by a track pitch, a wavelength and a numerical aperture of a condenser lens so that the light detector detects only a change in a light intensity due to an interference between a 0-order diffracted light ray and a 1-order diffracted light ray.
摘要翻译： 在诸如光盘装置的光学信息处理器中，当光束照射到信息记录介质上的多个轨道时，多个轨道用作衍射光栅。 通过光圈间距，聚光透镜的波长和数值孔径确定其中布置有光检测器的光接收部分的区域，使得光检测器仅检测由于0- 1级衍射光线和1级衍射光线。
-
2.发明授权Optical memory apparatus using an optical disc having guide-grooves of V-shape and predetermined optical depth and access method therefor 失效使用具有V形导向槽和预定光学深度的光盘的光存储装置及其访问方法
公开(公告)号：US4835756A
公开(公告)日：1989-05-30
申请号：US32506
申请日：1987-03-31
申请人： Toshimitsu Kaku , Takeshi Maeda , Shigeru Nakamura , Masaru Ito , Kazuo Shigematsu , Yoshito Tsunoda
发明人： Toshimitsu Kaku , Takeshi Maeda , Shigeru Nakamura , Masaru Ito , Kazuo Shigematsu , Yoshito Tsunoda
CPC分类号： G11B7/0938 , G11B7/08505 , G11B7/24079 , G11B7/24076
摘要： An optical memory apparatus employs an optical disc having a plurality of guide-grooves in spiral and concentrical form and a plurality of flat tracks each arranged between adjacent two of the guide-grooves for recording information thereon, and the depth of the guide-grooves is suitably selected to increase the degree of modulation of a track cross signal, thereby performing a stable cross track counting by the use of the track cross signal and a tracking signal. One feature of the invention relies in that the modulation degree of the track cross signal is in the range between 30 and 60%. A second feature of the invention is that the guide-grooves are formed into a V shape and have an optical depth of .lambda./6 to .lambda./5 (.lambda. is the wavelength of the light used). In accordance with the invention, not ony a stable cross track counting is realized, but also the tracking signal is not practically varied with variations in the depth of the guide-grooves, thereby ensuring a highly accurate and stable tracking control.
摘要翻译： 一种光存储装置采用具有多个螺旋形和同心形状的导向槽的光盘，以及多个平行轨道，每个平行轨迹布置在相邻的两个导槽之间，用于在其上记录信息，并且导向槽的深度为 适当地选择以增加轨道交叉信号的调制度，从而通过使用轨道交叉信号和跟踪信号执行稳定的交叉轨道计数。 本发明的一个特征在于，轨道交叉信号的调制度在30％与60％之间。 本发明的第二个特征是导槽形成为V形，并且具有λ/ 6至λ/ 5的光学深度（λ是所用光的波长）。 根据本发明，不能实现稳定的交叉轨道计数，而且跟踪信号实际上不随着导槽深度的变化而变化，从而确保高精度和稳定的跟踪控制。
-
公开(公告)号：US4656618A
公开(公告)日：1987-04-07
申请号：US639004
申请日：1984-08-09
CPC分类号： G11B27/36 , G11B7/004 , G11B7/12 , G11B7/128 , G11B7/0909
摘要： In an optical information recording and reproducing apparatus having a laser light source and an optical system so that a beam from the laser light source is irradiated through the optical system on an information recording medium to record and reproduce information, an accousto-optic modulator is disposed in the optical system for receiving the beam from the laser light source, and a modulation unit is provided which comprises an oscillator for generating a plurality of signals at different frequencies, a modulator for modulating the outputs of the oscillator and an adder for adding together the outputs of the modulator.
摘要翻译： 在具有激光光源和光学系统的光学信息记录和再现装置中，使得来自激光光源的光束通过光学系统照射在信息记录介质上以记录和再现信息，设置声光调制器 在用于从激光光源接收光束的光学系统中，提供了一种调制单元，其包括用于产生不同频率的多个信号的振荡器，用于调制振荡器的输出的调制器和用于将 调制器的输出。
-
公开(公告)号：US4807210A
公开(公告)日：1989-02-21
申请号：US71183
申请日：1987-07-08
IPC分类号： G11B7/00 , G11B7/004 , G11B7/0055 , G11B7/09 , G11B7/30 , G11B11/105 , G11B19/04 , G11B27/19 , G11B27/30
CPC分类号： G11B27/19 , G11B11/10517 , G11B11/10576 , G11B11/10595 , G11B19/04 , G11B27/3027 , G11B7/0901 , G11B7/0938 , G11B2220/20
摘要： An optical information processing apparatus uses an optical disk having correction marks such as mirror surfaces or wobbled pits intermittently arranged along a guide track. In a reproduce mode, tracking control is effected by correcting a tracking signal by a tracking offset component detected by the correction marks. In a record or erase mode, the track offset correction is deactivated and record or erase operation is controlled in accordance with an output level of the detected track offset component so that incomplete eraser of recorded data is prevented.
摘要翻译： 光学信息处理设备使用具有诸如镜面的校正标记的光盘或沿着导轨间歇地布置的摆动凹坑。 在再现模式中，通过由校正标记检测到的跟踪偏移分量来校正跟踪信号来实现跟踪控制。 在记录或擦除模式中，轨道偏移校正被禁用，并且根据检测到的轨道偏移分量的输出电平来控制记录或擦除操作，从而防止记录数据的不完整的橡皮擦。
-
5.发明授权Apparatus and record carrier for optical disc memory with correction pattern and master disc cutting apparatus 失效具有校正图案和主盘切割装置的光盘存储器的装置和记录载体
公开(公告)号：US4949331A
公开(公告)日：1990-08-14
申请号：US875442
申请日：1986-06-17
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.
摘要翻译： 公开了一种具有盘形基板和用于在其中光学地写入信息的记录层的记录载体，其包括沿着记录载体的旋转方向延伸的引导槽，使得引导槽的多个转动彼此间隔开 在记录载体的径向方向上设置的凹坑图案，以及设置在相邻引导槽之间的位置，在沿上述旋转方向间隔设置的位置处，用于检测光点与相邻引导槽之间的中心线的偏离。 该记录载体的记录/再现操作以从导槽的衍射光检测第一跟踪误差信号，从凹坑图案检测第二跟踪误差信号并将信息记录并再现 在使用第一和第二跟踪误差信号执行跟踪操作的状态下从形成在相邻引导槽之间的区域。 从凹坑图案检测到的第二跟踪误差信号不受记录载体的倾斜和光点的移动的影响。 当在闭环跟踪系统中使用通过将第一和第二跟踪误差信号彼此相加而获得的跟踪信号时，可以执行稳定的跟踪操作。 凹坑图案的极性在每个轨道上反转，因此在记录载体中提供具有λ/ 4深度（其中λ表示再现光束的波长）的极性凹坑，以反转第二 基于来自极性凹坑的信号在每个轨道上跟踪信号。
-
6.发明授权Magneto-optic memory apparatus with defect detection of recording medium during erasing operation 失效在擦除操作期间具有记录介质的缺陷检测的磁光存储装置
公开(公告)号：US4879703A
公开(公告)日：1989-11-07
申请号：US71178
申请日：1987-07-08
IPC分类号： G11B11/10 , G11B11/105 , G11B19/02 , G11B20/18 , G11B27/36
CPC分类号： G11B20/1883 , G11B11/105 , G11B11/10517 , G11B11/10595 , G11B19/02 , G11B27/36
摘要： A magneto-optic memory apparatus is disclosed in which a laser beam is focused on a recording medium having a perpendicularly-magnetized film, the intensity of said laser beam is caused to correspond to reproducing, recording and erasing operations, an external magnetic field is applied to the recording medium at least in recording and erasing periods so that the magnetic field in the recording period is opposite in direction to the magnetic field in the erasing period, a light quantity signal corresponding to the light quantity reflected from the recording medium and a magnetization signal corresponding to data recorded on the recording medium are produced by using the reflected light from the recording medium, at least one of the light quantity signal and the magnetization is amplified by a variable gain amplifier so that an amplified value in the erasing period is nearly equal to an amplified value in the reproducing period, a defect on the recording medium is detected from the output of the variable gain amplifier in the erasing period, and defect information thus obtained is utilized to record data in a non-defective region of the recording medium.
摘要翻译： 公开了一种磁光存储装置，其中激光束聚焦在具有垂直磁化膜的记录介质上，使得激光束的强度对应于再现，记录和擦除操作，施加外部磁场 至少在记录和擦除周期到记录介质，使得记录周期中的磁场在擦除周期中与磁场的方向相反，对应于从记录介质反射的光量的光量信号和磁化 通过使用来自记录介质的反射光产生对应于记录在记录介质上的数据的信号，光量信号和磁化中的至少一个被可变增益放大器放大，使得擦除周期中的放大值几乎 在再现期间等于放大值，从外部检测记录介质上的缺陷 并且利用这样获得的缺陷信息将数据记录在记录介质的无缺陷区域中。
-
7.发明授权Apparatus for optical disc memory with correction pattern and master disc cutting apparatus 失效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
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.
-
公开(公告)号：US4622564A
公开(公告)日：1986-11-11
申请号：US681690
申请日：1984-12-14
申请人： Toshimitsu Kaku , Takeshi Nakao , Yoshito Tsunoda
发明人： Toshimitsu Kaku , Takeshi Nakao , Yoshito Tsunoda
CPC分类号： G11B7/125 , G11B27/36 , G11B7/0055 , G11B7/0901 , G11B20/1879
摘要： In an optical information recording apparatus in which a plurality of light beams are focused on a disc to form a write/read spot or an erase spot, the position of the light spots on a track of the disc is detected to control the distance between the light spots or the length of the light spots, so that even when the positions at which the light spots are formed differ in the radial direction of the disc, uniform and accurate write/read/erase of information can be effected irrespective of the light spot positions.
摘要翻译： 在其中多个光束聚焦在盘上以形成写入/读取点或擦除点的光学信息记录装置中，检测光盘的轨道上的位置，以控制光盘之间的距离 光点或光斑的长度，使得即使形成光点的位置在盘的径向方向上不同，可以实现信息的均匀和准确的写入/读取/擦除，而不管光点如何 职位
-
公开(公告)号：US4532522A
公开(公告)日：1985-07-30
申请号：US408678
申请日：1982-08-16
CPC分类号： G11B7/09 , G11B7/0903 , G11B7/125
摘要： An optical recording apparatus wherein in front and rear of a first light spot for recording predetermined information along a guide groove provided in a recording medium beforehand, two second light spots and two third light spots are arranged along the guide groove and in a manner to mutually deviate from the center of the guide groove; the second light spots are arranged in an area with no information recorded therein, while the third light spots are arranged in an area with the information recorded therein; and the position of the first light spot is controlled on the basis of the difference between the quantities of light of the second light spots and the difference between the quantities of light of the third light spots, so as to track the information.
摘要翻译： 一种光学记录装置，其特征在于，在预先在设置于记录介质中的引导槽记录预定信息的第一光点的前方和后方，沿引导槽配置两个第二光点和两个第三光点， 偏离导槽的中心; 第二光点被布置在没有记录信息的区域中，而第三光点被布置在其中记录有信息的区域中; 并且基于第二光点的光量与第三光点的光量之差的差来控制第一光点的位置，以便跟踪信息。
-
10.发明授权Focus error detection apparatus utilizing focusing an front and rear sides of focal planes 失效利用聚焦平面的前后侧的聚焦误差检测装置
公开(公告)号：US4742218A
公开(公告)日：1988-05-03
申请号：US828354
申请日：1986-02-11
申请人： Shigeru Nakamura , Toshimasa Kamisada , Akira Saito , Takeshi Maeda , Yoshito Tsunoda , Toshimitsu Kaku , Tuyoshi Kato , Masaaki Hishiki , Masateru Watanabe
发明人： Shigeru Nakamura , Toshimasa Kamisada , Akira Saito , Takeshi Maeda , Yoshito Tsunoda , Toshimitsu Kaku , Tuyoshi Kato , Masaaki Hishiki , Masateru Watanabe
IPC分类号： G11B7/09 , G11B11/105 , G01J1/20 , G11B5/09
CPC分类号： G11B7/0912 , G11B11/10541 , G11B11/10576
摘要： A focus error detection apparatus and an optical disk apparatus comprising a focusing lens for focusing reflected light coming from a light reflecting surface which is to be adjusted at the focal point of a projected light beam; a beam splitter means for dividing the output light of said focusing lens into a first and a second focused light beam; a first and a second photo-detector disposed respectively on the optical paths of said first and said second focused light beam, one of which is located behind the convergence point of said first focused light beam and the other of which is located before the convergence point of said second focused light beam, each of them generating outputs proportional to the amount of light within a predetermined region of the received light image, when it varies so that it is enlarged; and a circuit generating a focus error signal by using the difference between the outputs of said two photo-detectors.
摘要翻译： 一种聚焦误差检测装置和光盘装置，包括：聚焦透镜，用于聚焦来自被投影光束的焦点处被调节的光反射表面的反射光; 分束器装置，用于将所述聚焦透镜的输出光分成第一和第二聚焦光束; 分别设置在所述第一和第二聚焦光束的光路上的第一和第二光电检测器，其中一个位于所述第一聚焦光束的会聚点之后，另一个位于会聚点之前 所述第二聚焦光束中的每一个产生与所接收的光图像的预定区域内的光量成比例的输出，当其变化使得其被放大时; 以及通过使用所述两个光电检测器的输出之间的差产生聚焦误差信号的电路。
-
-
-
-
-
-
-
-
-
搜索结果
77 条记录 (耗时 0.018 秒)
