公开(公告)号：US5614938A

公开(公告)日：1997-03-25

申请号：US464461

申请日：1995-06-05

申请人： Hisataka Sugiyama ,  Takeshi Maeda ,  Kiyoshi Matsumoto ,  Motoyasu Terao ,  Shigenori Okamine ,  Tetsuya Nishida ,  Harukazu Miyamoto

发明人： Hisataka Sugiyama ,  Takeshi Maeda ,  Kiyoshi Matsumoto ,  Motoyasu Terao ,  Shigenori Okamine ,  Tetsuya Nishida ,  Harukazu Miyamoto

IPC分类号： G11B7/004 ,  G11B7/125 ,  G11B7/14 ,  G11B7/24 ,  G11B7/243 ,  G11B7/257 ,  B41J2/47

CPC分类号： G11B7/004 ,  G11B7/125 ,  G11B7/14 ,  G11B7/24 ,  G11B7/24038 ,  G11B2007/0013 ,  G11B2007/2431 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B2007/25706 ,  G11B2007/2571 ,  G11B2007/25713 ,  G11B2007/25716 ,  G11B7/251

摘要： In a three-dimensional recording and reproducing apparatus having a recording medium including a plurality of recording layers stacked on a substrate and an optical system for converging a light irradiated from the substrate side on each of the plurality of recording layers to three-dimensionally record and reproduce information, the following equation is satisfied:.lambda./4.ltoreq.(1/8NB)(1/NB.sup.2 -1)NAF.sup.4 .DELTA.dwhere.lambda.: Wavelength of the light;NB: Refractivity of the substrate 3;NAF: Numerical aperture of a focus lens 8 for converging a light;.DELTA.d: Positional range in the optical axis direction in which exists a recording layer on which the light is to be converged.A light spot is focused on each layer of the multi-layer structured disc to record and reproduce highly reliable data in a high density.

摘要翻译： 在具有堆叠在基板上的多个记录层的记录介质的三维记录和再现装置和用于会聚从多个记录层中的每一个记录层上的基板侧照射的光的光学系统进行三维记录和 再现信息，满足以下等式：λ/ 4

公开(公告)号：US5559777A

公开(公告)日：1996-09-24

申请号：US428057

申请日：1995-04-25

申请人： Takeshi Maeda ,  Shinichi Arai ,  Kazuo Isaka ,  Atsushi Saito ,  Takuya Mizokami ,  Hisataka Sugiyama ,  Satoshi Kawamura

发明人： Takeshi Maeda ,  Shinichi Arai ,  Kazuo Isaka ,  Atsushi Saito ,  Takuya Mizokami ,  Hisataka Sugiyama ,  Satoshi Kawamura

IPC分类号： G11B7/004 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/007 ,  G11B7/125 ,  G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B20/18 ,  G11B23/40 ,  G11B5/09

CPC分类号： G11B7/005 ,  G11B20/10 ,  G11B20/1258 ,  G11B20/1403 ,  G11B20/1833 ,  G11B23/40 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/00736 ,  G11B7/0079 ,  G11B7/126 ,  G11B20/1879 ,  G11B2020/1277

摘要： An information recording/reproducing method is disclosed for an information recording/reproducing apparatus including a recording medium having a disk-like shape, a unit for rotating the recording medium at a constant angular velocity, a unit for recording code information so that the bit length of the code information becomes approximately constant with respect to a radial position on the recording medium, a unit for modulating the code information to be recorded to form a modulated signal, and a recording unit for forming in the recording medium a localized recording region having a different physical property with respect to an unrecorded region, the recording unit being controlled by the modulated signal so that the code information is recorded to correspond to the edge of the recording region, wherein the bit rate of the code information to be recorded changes depending on a location on the recording medium, and a part of each of a recording characteristic of the apparatus and a reproducing characteristic of the apparatus is changed in accordance with a location on the recording medium.

摘要翻译： 公开了一种信息记录/再现方法，用于包括具有盘状形状的记录介质，用于以恒定角速度旋转记录介质的单元的信息记录/再现装置，用于记录代码信息的单元，使得位长度 代码信息相对于记录介质上的径向位置变得近似恒定，用于调制要记录的代码信息以形成调制信号的单元，以及记录单元，用于在记录介质中形成具有 相对于未记录区域的不同物理特性，记录单元由调制信号控制，使得代码信息被记录为对应于记录区域的边缘，其中要记录的代码信息的比特率根据 记录介质上的位置，以及装置和记录介质的记录特性的一部分 根据记录介质上的位置改变设备的生产特性。

公开(公告)号：US5414451A

公开(公告)日：1995-05-09

申请号：US958162

申请日：1992-10-08

申请人： Hisataka Sugiyama ,  Takeshi Maeda ,  Kiyoshi Matsumoto ,  Motoyasu Terao ,  Shigenori Okamine ,  Tetsuya Nishida ,  Harukazu Miyamoto

发明人： Hisataka Sugiyama ,  Takeshi Maeda ,  Kiyoshi Matsumoto ,  Motoyasu Terao ,  Shigenori Okamine ,  Tetsuya Nishida ,  Harukazu Miyamoto

IPC分类号： G11B7/00 ,  G11B7/007 ,  G11B7/003 ,  G11B7/004 ,  G11B7/0065 ,  G11B7/09 ,  G11B7/135 ,  G11B7/14 ,  G11B7/20 ,  G11B7/24 ,  B41J2/435

CPC分类号： G11B7/004 ,  G11B7/1372 ,  G11B7/14 ,  G11B7/24 ,  G11B7/24038

摘要： In a three-dimensional recording and reproducing apparatus having a recording medium including a plurality of recording layers stacked on a substrate and an optical system for converging a light irradiated from the substrate side on each of the plurality of recording layers to three-dimensionally record and reproduce information, the following equation is satisfied:.lambda./4.ltoreq.(1/8/NB)(1 /NB.sup.2 -1)NAF.sup.4 .DELTA.dwhere.lambda.: Wavelength of the light;NB: Refractivity of the substrate;NAF: Numerical aperture of a focus lens for converging a light;.DELTA.d: Positional range in the optical axis direction in which exists a recording layer on which the light is to be converged.A light spot is focused on each layer of the multi-layer structured disc to record and reproduce highly reliable data in a high density.

摘要翻译： 在具有堆叠在基板上的多个记录层的记录介质的三维记录和再现装置和用于会聚从多个记录层中的每一个记录层上的基板侧照射的光的光学系统进行三维记录和 再现信息，满足以下等式：λ/ 4

公开(公告)号：US5281797A

公开(公告)日：1994-01-25

申请号：US996033

申请日：1992-12-23

申请人： Kimio Tatsuno ,  Shigeru Nakamura ,  Hisataka Sugiyama ,  Masahiko Takahashi

发明人： Kimio Tatsuno ,  Shigeru Nakamura ,  Hisataka Sugiyama ,  Masahiko Takahashi

IPC分类号： G11B7/125 ,  G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/09 ,  G11B7/135 ,  G11B11/10 ,  G11B11/105 ,  G01S1/20

CPC分类号： G11B7/1381 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/0903 ,  G11B7/139 ,  G11B2007/0006

摘要： An optical disk head having a short wavelength light source has an aperture diaphragm placed in the course of its focusing optical system which can change its aperture diameter depending on the pit size on an optical disk in order to allow recording on and reproducing from not only a short wavelength optical disk, but also a long wavelength optical disk. The aperture diameter is made larger for the smaller pit size and vice versa, and the light source output is adjusted depending on the aperture diameter so that the light amount coming from the disk surface to a photodetector cannot be changed with the aperture diameter.

摘要翻译： 具有短波长光源的光盘头具有放置在其聚焦光学系统的过程中的孔径光阑，其可以根据光盘上的凹坑尺寸改变其孔径直径，以允许不仅记录 短波长光盘，也是长波长光盘。 对于较小的凹坑尺寸，孔径直径变大，反之亦然，并且根据孔径直径调节光源输出，使得从盘表面到光电检测器的光量不能随孔径而改变。

公开(公告)号：US4835759A

公开(公告)日：1989-05-30

申请号：US878436

申请日：1986-06-25

申请人： Atsushi Saito ,  Takeshi Maeda ,  Hisataka Sugiyama ,  Kazuo Shigematsu ,  Wasao Takasugi

发明人： Atsushi Saito ,  Takeshi Maeda ,  Hisataka Sugiyama ,  Kazuo Shigematsu ,  Wasao Takasugi

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B7/013 ,  G11B20/10 ,  G11B20/14 ,  G11B27/30

CPC分类号： G11B20/10222 ,  G11B20/10009 ,  G11B20/1403 ,  G11B27/3027 ,  G11B7/004 ,  G11B7/24085

摘要： When recording domains are formed locally on a recording medium and information is recorded and reproduced by using rise and fall in a reproduced waveform obtained from the recording domains as data, timing patterns indicating start of demodulation are recorded for the lead-edge and the tail-edge of the recording domains, respectively; time interval between the timing signal for starting demodulation detected from the rise in the reproduced waveform and the timing signal for starting demodulation detected from the fall in the reproduced waveform is detected; time shifts of the signals detected from the lead-edge and the tail-edge of the recording domains succeeding the timing patterns for starting demodulation by using the time interval thus detected; and the information is stably detected as time sequential data having no jitter.

摘要翻译： 当在记录介质上本地形成记录域时，通过使用从记录域获得的再现波形中的上升和下降来记录和再现信息作为数据，记录指示开始解调的定时模式用于前沿和尾部， 分别记录域的边缘; 检测从再生波形的上升检测到的开始解调用定时信号与从再现波形的下降检测到的开始解调用定时信号之间的时间间隔; 通过使用这样检测的时间间隔，从用于开始解调的定时模式的记录区域的前沿和尾边检测到的信号的时移; 并且信息被稳定地检测为没有抖动的时序数据。