公开(公告)号：US5309415A

公开(公告)日：1994-05-03

申请号：US734963

申请日：1991-07-24

申请人： Koichi Takeuchi ,  Osamu Ito ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka ,  Isao Watanabe ,  Kazuhiko Tsutsumi ,  Ryuichirou Arai ,  Yoshihiro Kiyose ,  Kazuhiko Nakane ,  Teruo Furukawa ,  Masayoshi Shimamoto ,  Yoshiyuki Nakai

发明人： Koichi Takeuchi ,  Osamu Ito ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka ,  Isao Watanabe ,  Kazuhiko Tsutsumi ,  Ryuichirou Arai ,  Yoshihiro Kiyose ,  Kazuhiko Nakane ,  Teruo Furukawa ,  Masayoshi Shimamoto ,  Yoshiyuki Nakai

IPC分类号： G11B7/09 ,  G11B11/105 ,  G11B13/04 ,  G11B11/10 ,  G11B11/12

CPC分类号： G11B11/10517 ,  G11B11/10586 ,  G11B7/0901

摘要： Methods and apparatuses are disclosed for improving accuracy of recording and reproducing information onto and from a magneto-optic recording information medium. In the first method, a width of a mark formed by a relatively low intensity light beam between two kinds of light beam intensities used for recording information is made larger than a sum of a track land width and the maximum track offset of the light beam, thereby the mark formed by the relatively low intensity light beam covers the track land portion in its full width. In the first apparatus, a reflected light beam from the magneto-optic recording information medium is split into a reflected beam for information reproducing and a reflected beam for tracking and focusing servos at the reproducing, thereby the apparatus can remove part being affected by the track groove portion from the reflected light beam for information reproducing. In the second method and apparatus, an intensity ratio of the two kinds of intensities of light beams used for information recording is controlled in such a manner that a mark width formed by the relative low intensity light beam is wider than a mark width formed by the relative high intensity light beam.

摘要翻译： 公开了用于提高在磁光记录信息介质上记录和再现信息的精度的方法和装置。 在第一种方法中，使用用于记录信息的两种光束强度之间由相对低强度的光束形成的标记的宽度大于光束的轨迹平面宽度和最大光轨偏移之和， 由此由相对低强度的光束形成的标记以其宽度覆盖轨迹陆部。 在第一装置中，来自磁光记录信息介质的反射光束被分成用于信息再现的反射光束和用于在再现时跟踪和聚焦伺服的反射光束，从而该装置可以去除受轨迹影响的部分 沟槽部分，用于信息再现。 在第二方法和装置中，用于信息记录的光束的两种强度的强度比被控制为使得由相对低强度光束形成的标记宽度比由 相对高强度光束。

公开(公告)号：US5272684A

公开(公告)日：1993-12-21

申请号：US558673

申请日：1990-07-26

申请人： Koichi Takeuchi ,  Osamu Ito ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka ,  Isao Watanabe ,  Kazuhiko Tsutsumi ,  Ryuichirou Aria ,  Yoshihiro Kiyose ,  Kazuhiko Nakane ,  Teruo Furukawa ,  Masayoshi Shimamoto ,  Yoshiyuki Nakaki

发明人： Koichi Takeuchi ,  Osamu Ito ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka ,  Isao Watanabe ,  Kazuhiko Tsutsumi ,  Ryuichirou Aria ,  Yoshihiro Kiyose ,  Kazuhiko Nakane ,  Teruo Furukawa ,  Masayoshi Shimamoto ,  Yoshiyuki Nakaki

IPC分类号： G11B7/09 ,  G11B11/105 ,  G11B11/00 ,  G11B3/70

CPC分类号： G11B11/10517 ,  G11B11/10586 ,  G11B7/0901

摘要： Methods and apparatuses are disclosed for improving accuracy of recording and reproducing information onto and from a magneto-optic recording information medium. In the first method, a width of a mark formed by a relatively low intensity light beam between two kinds of light beam intensities used for recording information is made larger than a sum of a track land width and the maximum track offset of the light beam, thereby the mark formed by the relatively low intensity light beam covers the track land portion in its full width. In the first apparatus, a reflected light beam from the magneto-optic recording information medium is split into a reflected beam for information reproducing and a reflected beam for tracking and focusing servos at the reproducing, thereby the apparatus can remove part being affected by the track groove portion from the reflected light beam for information reproducing. In the second method and apparatus, an intensity ratio of the two kinds of intensities of light beams used for information recording is controlled in such a manner that a mark width formed by the relative low intensity light beam is wider than a mark width formed by the relative high intensity light beam.

摘要翻译： 公开了用于提高在磁光记录信息介质上记录和再现信息的精度的方法和装置。 在第一种方法中，使用用于记录信息的两种光束强度之间由相对低强度的光束形成的标记的宽度大于光束的轨迹平面宽度和最大光轨偏移之和， 由此由相对低强度的光束形成的标记以其宽度覆盖轨迹陆部。 在第一装置中，来自磁光记录信息介质的反射光束被分割成用于信息再现的反射光束和用于在再现时跟踪和聚焦伺服的反射光束，从而该装置可以去除受轨迹影响的部分 沟槽部分，用于信息再现。 在第二方法和装置中，用于信息记录的光束的两种强度的强度比被控制为使得由相对低强度光束形成的标记宽度比由 相对高强度光束。

公开(公告)号：US5107483A

公开(公告)日：1992-04-21

申请号：US231881

申请日：1988-08-12

申请人： Yoshiki Nakajima ,  Kunimaro Tanaka ,  Kyosuke Yoshimoto ,  Motomu Yoshimura ,  Mitsuo Maeda ,  Koichi Takeuchi ,  Kouichi Yamada ,  Masaharu Ogawa ,  Kazuhiko Nakane ,  Hajime Nakajima ,  Masayoshi Shimamoto ,  Fumio Matsuda ,  Minoru Ozaki

发明人： Yoshiki Nakajima ,  Kunimaro Tanaka ,  Kyosuke Yoshimoto ,  Motomu Yoshimura ,  Mitsuo Maeda ,  Koichi Takeuchi ,  Kouichi Yamada ,  Masaharu Ogawa ,  Kazuhiko Nakane ,  Hajime Nakajima ,  Masayoshi Shimamoto ,  Fumio Matsuda ,  Minoru Ozaki

IPC分类号： G11B7/0045 ,  G11B7/125 ,  G11B7/24

CPC分类号： G11B7/126 ,  G11B7/00453 ,  G11B7/24

摘要： An apparatus in accordance with the present invention sequentially fixes the wavelength of a light beam irradiated from a light source whose oscillation wavelength sequentially varies to a plurality of different wavelengths to a recording medium to required wavelengths each capable of forming a hole at absorption spectrum of the recording medium, synchronizes timing of change of the wavelength of the light source with timing of recording or regenerating each bit of information, records the optical hole formed in a manner that each bit of information corresponds to the wavelength varying in sequence, and detects the formed hole to regenerate information. Furthermore, the holes formed by the same wavelength are recorded at the positions separated by a distance capable of avoiding interference, while the holes formed by different wavelengths in correspondence to each bit of information are recorded at nearly the same position while that position is slightly displaced at a time, and thereby information is multiple-recorded with high density.

摘要翻译： 根据本发明的装置将从振荡波长依次变化的光源照射到多个不同波长的光束的波长的顺序地固定到记录介质上，每个波长能够在吸收光谱上形成孔 记录介质，使光源的波长的变化的定时与记录或再生每个信息位的定时同步，以使每个位的信息顺序对应于波长变化的方式记录形成的光孔，并检测形成的 孔重新生成信息。 此外，由相同波长形成的孔被记录在以避免干扰的距离分开的位置处，而与每个信息位对应的不同波长形成的孔被记录在几乎相同的位置，同时该位置稍微位移 同时，信息以高密度多重记录。

公开(公告)号：US5007038A

公开(公告)日：1991-04-09

申请号：US226722

申请日：1988-08-01

申请人： Kazuhiko Nakane ,  Teruo Furukawa ,  Masayoshi Shimamoto ,  Kyosuke Yoshimoto

发明人： Kazuhiko Nakane ,  Teruo Furukawa ,  Masayoshi Shimamoto ,  Kyosuke Yoshimoto

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0055 ,  G11B7/09 ,  G11B19/04

CPC分类号： G11B7/0941 ,  G11B19/04

摘要： When recording, reproducing or erasing data signal by illuminating a recording medium surface with a condensed light spot, a tracking sensor signal or a focusing sensor signal is detected from light reflected from the recording medium surface. The detected signal is subjected to current-to-voltage conversion, and the current-to-voltage conversion gain is switched by estimating reflected light power from the recording medium surface.

摘要翻译： 当通过用聚光点照射记录介质表面来记录，再现或擦除数据信号时，从记录介质表面反射的光中检测跟踪传感器信号或聚焦传感器信号。 对所检测的信号进行电流 - 电压转换，并且通过估计来自记录介质表面的反射光功率来切换电流 - 电压转换增益。

公开(公告)号：US5264911A

公开(公告)日：1993-11-23

申请号：US810209

申请日：1991-12-19

申请人： Kazuhiko Nakane ,  Masayoshi Shimamoto ,  Yoshihiro Kiyose ,  Keiji Nakatsu ,  Isao Watanabe ,  Masami Horita ,  Kenichi Sato ,  Kenji Shimozawa ,  Hiroshi Konuma ,  Masaharu Yoshimura

发明人： Kazuhiko Nakane ,  Masayoshi Shimamoto ,  Yoshihiro Kiyose ,  Keiji Nakatsu ,  Isao Watanabe ,  Masami Horita ,  Kenichi Sato ,  Kenji Shimozawa ,  Hiroshi Konuma ,  Masaharu Yoshimura

IPC分类号： G11B33/10 ,  G01J1/42 ,  G11B3/90

CPC分类号： G11B33/10

摘要： A laser power measuring jig is adapted for use in measuring a laser power of a laser beam which is emitted from an optical head of an optical disk unit which records and/or reproduces information on and/or from a medium. The laser power measuring jig supplies power information related to the laser power of the laser beam to a power meter which measures the laser power. The laser power measuring jig includes a main jig body which has a size and a shape which are approximately the same as those of the medium, and this main jig body is loaded into the optical disk unit. The laser power measuring jig also includes a mechanism for outputting the power information outside the optical disk unit and supplying the laser power information to the power meter when the main jig body is loaded into the optical disk unit.

摘要翻译： 激光功率测量夹具适用于测量从光盘单元的光头发射的激光束的激光功率，其在介质上记录和/或再现信息。 激光功率测量夹具将与激光束的激光功率有关的功率信息提供给测量激光功率的功率计。 激光功率测量夹具包括具有与介质大致相同的尺寸和形状的主夹具本体，并且该主夹具本体被装载到光盘单元中。 激光功率测量夹具还包括一个机构，用于当主夹具体被装载到光盘单元中时，输出光盘单元外部的功率信息并将激光功率信息提供给功率计。

公开(公告)号：US5218591A

公开(公告)日：1993-06-08

申请号：US725277

申请日：1991-07-03

申请人： Masayoshi Shimamoto ,  Kunimaro Tanaka ,  Isao Watanabe ,  Osamu Ito

发明人： Masayoshi Shimamoto ,  Kunimaro Tanaka ,  Isao Watanabe ,  Osamu Ito

IPC分类号： G11B11/10 ,  G11B7/00 ,  G11B7/0045 ,  G11B7/013 ,  G11B7/125 ,  G11B11/105 ,  G11B20/10

CPC分类号： G11B7/126 ,  G11B11/10528 ,  G11B11/1053 ,  G11B11/10595 ,  G11B20/10194 ,  G11B7/0045 ,  G11B7/00451 ,  G11B7/125 ,  G11B7/24085 ,  G11B11/10506

摘要： In an optical disk apparatus for recording information in pits formed on an optical disk by projecting a light beam onto the optical disk and heating an area of the optical disk corresponding to the pulse pattern of the information, the pulse pattern of the information to be recorded is discriminated, and on the basis of the discriminated pulse pattern, the timing to start on and end the emission of the light beam from the light source to the optical disk is modified, or the number of emissions and the duration of each emission is controlled so that the pattern of the pits are corrected to the shapes that ensure accurate regeneration of the information.

摘要翻译： 在光盘装置中，通过将光束投射到光盘上并且对与信息的脉冲图案对应的光盘的区域进行加热来记录在光盘上形成的凹坑中的信息，记录的信息的脉冲图案 并且基于所识别的脉冲图案，改变开始并结束从光源到光盘的光束发射的定时，或者控制发射的数量和每个发射的持续时间 使得凹坑的图案被校正为确保信息的准确再生的形状。

公开(公告)号：US5003525A

公开(公告)日：1991-03-26

申请号：US209552

申请日：1988-06-21

申请人： Masayoshi Shimamoto ,  Kazuhiko Nakane ,  Teruo Furukawa

发明人： Masayoshi Shimamoto ,  Kazuhiko Nakane ,  Teruo Furukawa

IPC分类号： G11B7/09 ,  G11B7/005 ,  G11B7/13 ,  G11B11/10 ,  G11B11/105 ,  G11B13/04 ,  G11B27/24

CPC分类号： G11B7/005 ,  G11B11/10536 ,  G11B11/10597 ,  G11B13/04 ,  G11B27/24 ,  G11B7/13

摘要： A recording medium drive apparatus has a first detector for detecting tracking information and a second detector for detecting focusing information when magnetization information and pit information recorded on an optical disc are reproduced and detected. This apparatus also comprises a preamplifier having the function of selecting by a control signal either a mode for adding and amplifying output signals of the first and second detectors by utilizing a predetermined gain or a mode for subtracting and amplifying those output signals by utilizing another predetermined gain, of unconditionally selecting the polarities of the added and subtracted amplification signals by means of the control signal, and of selectively outputting signals V.sub.i (i=1, 2, 3, 4).

摘要翻译： 记录介质驱动装置具有用于检测跟踪信息的第一检测器和用于在再现和检测记录在光盘上的磁化信息和凹坑信息时检测聚焦信息的第二检测器。 该装置还包括具有通过控制信号选择用于通过利用预定增益来添加和放大第一和第二检测器的输出信号的模式的功能的前置放大器，或者通过利用另外的预定增益来减法和放大那些输出信号的模式 ，通过控制信号无条件地选择加法和减法的放大信号的极性，并选择性地输出信号Vi（i = 1,2,3,4）。

公开(公告)号：US06754145B1

公开(公告)日：2004-06-22

申请号：US09510196

申请日：2000-02-22

申请人： Masayoshi Shimamoto ,  Kazuhiko Nakane

发明人： Masayoshi Shimamoto ,  Kazuhiko Nakane

IPC分类号： G11B700

CPC分类号： G11B7/0938 ,  G11B7/00745 ,  G11B7/0956

摘要： In a disk drive for compensating the tilt between a disk including a first identification information area shifted radially outward by a predetermined distance from the center of a track, and a second identification information area shifted radially inward by the same distance, and a head for forming a light spot on the disk, there are provided a unit for determining a sum signal of an output signal from a photodetector obtained when the light spot traces the first identification information area and an output signal obtained when the light spot traces the second identification information area, and a tilt control unit for using the sum signal as an index to control the relative tilt between the disk and the head so as to cause the index to approach an extreme value.

摘要翻译： 在用于补偿包括从轨道中心径向向外移动预定距离的第一识别信息区域和径向向内移动相同距离的第二识别信息区域的盘之间的倾斜的盘驱动器中，以及用于形成 提供了一个单元，用于确定当光点跟踪第一识别信息区域时获得的光电检测器的输出信号的和信号和当光点跟踪第二识别信息区域时获得的输出信号的单元 以及倾斜控制单元，用于使用和信号作为指标来控制盘和头之间的相对倾斜度，以使得指数接近极值。

公开(公告)号：US5946285A

公开(公告)日：1999-08-31

申请号：US808534

申请日：1997-02-28

申请人： Kazuhiko Nakane ,  Masato Nagasawa ,  Hiroyuki Ohata ,  Masayoshi Shimamoto ,  Kouichi Komawaki ,  Kenji Gotoh ,  Yoshinobu Ishida

发明人： Kazuhiko Nakane ,  Masato Nagasawa ,  Hiroyuki Ohata ,  Masayoshi Shimamoto ,  Kouichi Komawaki ,  Kenji Gotoh ,  Yoshinobu Ishida

IPC分类号： G11B20/12 ,  G11B7/007 ,  G11B7/09 ,  G11B7/08

CPC分类号： G11B7/00745 ,  G11B7/00718 ,  G11B7/0901 ,  G11B7/0938

摘要： In optical disk having a track formed of groove tracks and land tracks connected every revolution to form a single spiral, each revolution-of the tracks is divided into sectors, each having identification signal region at the head of the sector, and the identification signal regions in tracks adjacent to each other are aligned in the radial direction. Prepits are formed in the identification signal region, on an extension of a boundary between groove and land tracks adjacent to each other. The prepits have a width substantially equal to the width of the grooves. The identification signal including address information of the sector. The polarity of tracking error signal is detected at the identification signal region of the recording sector, and whether the recording sector is in a groove track or land track is determined based on the polarity of tracking error signal. The identification signal may include information concerning the timing for switching tracking polarity in accordance with whether groove or land sector is being scanned.

摘要翻译： 在具有由每转一次连接的沟槽轨道和脊迹道形成的轨道形成单个螺旋的光盘中，轨道的每转都被划分成扇区，每个扇区在扇区的头部具有识别信号区域，并且识别信号区域 在彼此相邻的轨道中在径向方向上对齐。 在识别信号区域中，在彼此相邻的槽和焊盘轨迹之间的边界的延伸部上形成预浸料。 预凹坑的宽度基本上等于槽的宽度。 识别信号包括扇区的地址信息。 在记录扇区的识别信号区域处检测跟踪误差信号的极性，并且基于跟踪误差信号的极性来确定记录扇区是凹槽轨道还是槽脊轨道。 识别信号可以包括关于根据是否正在扫描凹槽或脊扇区的切换跟踪极性的定时的信息。

公开(公告)号：US5278815A

公开(公告)日：1994-01-11

申请号：US765129

申请日：1991-09-25

申请人： Akira Mashimo ,  Mitsumasa Kubo ,  Fumio Hishiyama ,  Masayoshi Shimamoto ,  Teruo Furukawa

发明人： Akira Mashimo ,  Mitsumasa Kubo ,  Fumio Hishiyama ,  Masayoshi Shimamoto ,  Teruo Furukawa

IPC分类号： G11B7/007 ,  G11B20/14 ,  G11B5/09

CPC分类号： G11B7/00745 ,  G11B20/1403

摘要： This digital data reproducing apparatus is adapted to prevent reproduction errors of data, wherein a read gate opened when a fixed pattern in a header field for phase locking is detected is kept opened until the data reproduction in a data field is completed, whereby the phase locking in the data field is performed still in the same low-speed mode as when the PLL pull-in is completed in the header field, with the responding ability lowered to defects such as voids or the like in the phase locking pattern area in the data field.This digital data reproducing apparatus is adapted to prevent reproduction errors, wherein, when a reproduced data in a data field is locked, a read gate is opened after a fixed pattern recorded for phase locking is surely detected, so that the phase locking is started in a high-speed mode, while avoiding erroneous operations of the PLL.

摘要翻译： 该数字数据再现装置适用于防止检测到用于相位锁定的标题字段中的固定图案时读取门打开的数据的再现错误，直到数据字段中的数据再现完成为止， 数据字段仍然处于与报头字段中PLL拉入完成相同的低速模式，响应能力降低到数据中相位锁定模式区域中的诸如空白等的缺陷 领域。 该数字数据再现装置适于防止再现错误，其中当数据字段中的再现数据被锁定时，在可靠地检测到记录为相位锁定的固定图案之后，读门被打开，从而开始相位锁定 高速模式，同时避免PLL的错误操作。