公开(公告)号：US20110199877A1

公开(公告)日：2011-08-18

申请号：US13094220

申请日：2011-04-26

申请人： Atsushi NAKAMURA ,  Naoyasu Miyagawa

发明人： Atsushi NAKAMURA ,  Naoyasu Miyagawa

IPC分类号： G11B7/004 ,  G11B7/24

CPC分类号： G11B7/126 ,  G11B7/00456 ,  G11B7/0062

摘要： There is provided an optical recording method for directing a recording pulse train to an optical disc medium to form marks thereon and for recording information as information about the edge positions of said marks and the spaces between marks, the recording pulse train having been created by modulating laser light into plural power levels. The method includes: coding to-be-recorded data into coded data consisting of the combination of marks and spaces; classifying said marks within said coded data on the basis of the mark length and the preceding or succeeding space lengths of the marks; shifting the position of the second pulse edge counted from the end portion of the recording pulse train for forming said marks, depending on the result of said classification, to adjust said recording pulse train; and directing said recording pulse train to the optical disc medium to form said marks thereon.

公开(公告)号：US08000177B2

公开(公告)日：2011-08-16

申请号：US12303832

申请日：2007-05-31

申请人： Atsushi Nakamura ,  Naoyasu Miyagawa

发明人： Atsushi Nakamura ,  Naoyasu Miyagawa

IPC分类号： G11B11/00

CPC分类号： G11B7/005 ,  G11B7/1267 ,  G11B19/04 ,  G11B19/28

摘要： A reading devices suppresses deterioration of the recording marks caused by increasing the output laser power to compensate for a drop in the S/N ratio when reading at a high speed information recorded to a high density recording medium. To read information recorded to an optical data recording medium that is written and read using a laser beam output from a semiconductor laser, the reading method modulates a high frequency current on the drive current of the semiconductor laser to output the laser beam, and changes the light modulation rate according to the selected linear velocity used for reading. The light modulation rate is the ratio Pp/Pave between the peak power Pp and the average read power Pave of the light intensity of the high frequency modulated laser beam.

摘要翻译： 读取装置抑制由于增加输出激光功率而导致的记录标记的劣化，以补偿在记录到高密度记录介质的高速信息下读取时的S / N比的下降。 为了读取记录到使用从半导体激光器输出的激光束进行写入和读取的光学数据记录介质的信息，该读取方法调制高频电流对半导体激光器的驱动电流的输出，并输出激光束 根据用于读取的所选线速度的光调制率。 光调制率是峰值功率Pp与高频调制激光束的光强度的平均读取功率Pave之比Pp / Pave。

公开(公告)号：US20130215731A1

公开(公告)日：2013-08-22

申请号：US13881837

申请日：2012-03-13

申请人： Tomoyasu Takaoka ,  Atsushi Nakamura ,  Tetsuya Akiyama ,  Naoyasu Miyagawa

发明人： Tomoyasu Takaoka ,  Atsushi Nakamura ,  Tetsuya Akiyama ,  Naoyasu Miyagawa

IPC分类号： G11B7/0045

CPC分类号： G11B7/00456 ,  G11B7/0062 ,  G11B7/1263 ,  G11B7/1267 ,  G11B7/24038

摘要： When the power of the write pulse is taken as the peak power and the power of the bottom pulse is taken as the bottom power, the power setting device (114) sets the power of each pulse in the recording pulse train such that the peak power PwN of the Nth information layer which is closest to the light entry surface of the optical recording medium (11), the bottom power PbN of the Nth information layer, the peak power PwM of the Mth information layer (where M is an integer such that N>M≧1), and the bottom power PbM of the Mth information layer satisfy the following formula: PbN/PwN>PbM/PwM.

摘要翻译： 当将写入脉冲的功率作为峰值功率并且将底部脉冲的功率作为底部功率时，功率设定装置（114）将记录脉冲串中的每个脉冲的功率设置为使得峰值功率 最靠近光记录介质（11）的光入射表面的第N个信息层的PwN，第N个信息层的底部功率PbN，第M个信息层的峰值功率PwM（其中M是整数，使得 N> M> = 1），第M个信息层的底部功率PbM满足下式：PbN / PwN> PbM / PwM。

公开(公告)号：US20110107134A1

公开(公告)日：2011-05-05

申请号：US13000178

申请日：2010-03-05

申请人： Kiyotaka Ito ,  Mamoru Shoji ,  Yasumori Hino ,  Atsushi Nakamura ,  Naoyasu Miyagawa ,  Motoshi Ito

发明人： Kiyotaka Ito ,  Mamoru Shoji ,  Yasumori Hino ,  Atsushi Nakamura ,  Naoyasu Miyagawa ,  Motoshi Ito

IPC分类号： G06F1/04

CPC分类号： G11B7/00736 ,  G11B7/00456 ,  G11B7/0062

摘要： The present invention provides a measure for getting read/write control information stored within a space of a predetermined size in a format that ensures compatibility with media of a lower order or an older generation even if the size of the read/write control information increases significantly as the storage densities of information storage media rise in the near future. On an information storage medium, a data sequence is writable as a combination of marks and spaces. The medium has at least one information storage layer, which has an information storage area to store information and a control information area for use to perform a read/write operation on the at least one information storage layer. The control information area stores at least one set of control information, which includes a first kind of write pulse information including information to be used as a reference value and a second kind of write pulse information including information to be used as an offset value. If the pulse width or pulse position of a write pulse is definable with a precision of 1T/n (where T is a channel clock pulse width and n is a positive integer), the size of the offset value is large enough to define at least an n/2 range.

摘要翻译： 本发明提供一种用于获得存储在预定大小的空间内的读/写控制信息的措施，即使读/写控制信息的大小显着增加，也可以确保与较低级别或较老版本的媒体兼容的格式 随着信息存储媒体的存储密度在不久的将来上升。 在信息存储介质上，作为标记和空格的组合可写入数据序列。 介质具有至少一个信息存储层，其具有用于存储信息的信息存储区域和用于对至少一个信息存储层执行读/写操作的控制信息区域。 控制信息区域存储至少一组控制信息，该组控制信息包括包括要用作参考值的信息的第一种写入脉冲信息和包括要用作偏移值的信息的第二种写入脉冲信息。 如果写入脉冲的脉冲宽度或脉冲位置以1T / n的精度定义（其中T是通道时钟脉冲宽度，n是正整数），则偏移值的大小足够大以至少定义 一个n / 2范围。

公开(公告)号：US20110063963A1

公开(公告)日：2011-03-17

申请号：US12915307

申请日：2010-10-29

申请人： Atsushi NAKAMURA ,  Naoyasu Miyagawa

发明人： Atsushi NAKAMURA ,  Naoyasu Miyagawa

IPC分类号： G11B20/10

CPC分类号： G11B7/126 ,  G11B7/00456 ,  G11B7/0062

摘要： There is provided an optical recording method for directing a recording pulse train to an optical disc medium to form marks thereon and for recording information as information about the edge positions of said marks and the spaces between marks, the recording pulse train having been created by modulating laser light into plural power levels. The method includes: coding to-be-recorded data into coded data consisting of the combination of marks and spaces; classifying said marks within said coded data on the basis of the mark length and the preceding or succeeding space lengths of the marks; shifting the position of the second pulse edge counted from the end portion of the recording pulse train for forming said marks, depending on the result of said classification, to adjust said recording pulse train; and directing said recording pulse train to the optical disc medium to form said marks thereon.

摘要翻译： 提供了一种用于将记录脉冲序列引导到光盘介质以在其上形成标记并用于记录信息作为关于所述标记的边缘位置和标记之间的空间的信息的光学记录方法，记录脉冲串是通过调制产生的 激光成多个功率级。 该方法包括：将要记录的数据编码成由标记和空格的组合组成的编码数据; 基于标记长度和标记的前一或后续间隔长度，对所述编码数据内的所述标记进行分类; 根据所述分类的结果，从用于形成所述标记的记录脉冲序列的端部计数的第二脉冲边缘的位置移位，以调整所述记录脉冲串; 并将所述记录脉冲序列引导到光盘介质上以在其上形成所述标记。

公开(公告)号：US20110051592A1

公开(公告)日：2011-03-03

申请号：US12920193

申请日：2010-03-01

申请人： Atsushi Nakamura ,  Naoyasu Miyagawa ,  Kiyotaka Ito ,  Mamoru Shoji ,  Yasumori Hino

发明人： Atsushi Nakamura ,  Naoyasu Miyagawa ,  Kiyotaka Ito ,  Mamoru Shoji ,  Yasumori Hino

IPC分类号： G11B7/26

CPC分类号： G11B7/00736 ,  G11B7/00454 ,  G11B7/00456 ,  G11B7/261 ,  G11B7/263 ,  G11B20/10009 ,  G11B20/10453 ,  G11B20/1217 ,  G11B2007/0006 ,  G11B2020/1279 ,  G11B2020/1298 ,  G11B2220/2541

摘要： An optical information storage medium according to the present invention has at least one information storage layer. The optical information storage medium has a management area that stores at least one unit containing control information about the optical information storage medium. The control information includes a format number, which provides information about at least a write strategy type and a write pre-compensation type, and a write strategy parameter, which provides information about the magnitude of shift in an edge position, or variation in the pulse width, of a write pulse train to form a recording mark. And the value of the format number changes according to a combination of the write strategy type and the write pre-compensation type.

摘要翻译： 根据本发明的光学信息存储介质具有至少一个信息存储层。 光信息存储介质具有存储包含关于光信息存储介质的控制信息的至少一个单元的管理区域。 控制信息包括提供关于至少写入策略类型和写入预补偿类型的信息的格式编号，以及写入策略参数，其提供关于边缘位置的移位幅度或脉冲变化的信息 写入脉冲串的宽度以形成记录标记。 并且格式编号的值根据写策略类型和写预补偿类型的组合而改变。

公开(公告)号：US08169883B2

公开(公告)日：2012-05-01

申请号：US10876494

申请日：2004-06-25

申请人： Naoyasu Miyagawa ,  Motoshi Ito

发明人： Naoyasu Miyagawa ,  Motoshi Ito

IPC分类号： G11B7/24

CPC分类号： G11B7/1267 ,  G11B7/0045 ,  G11B7/00736 ,  G11B7/24038 ,  G11B2007/0013

摘要： An optical disk includes a first information recording layer, and second to N-th information recording layers (with N being an integer of two or greater) that are arranged further toward the side from which laser light is irradiated than the first information recording layer and which are arranged in order from the side near the first information recording layer. The first information recording layer includes a read-only control data region, a first recording learning region for learning recording parameters to record data, and a first user data recording region for recording user data. When taking at least one of the second to N-th information recording layers as an i-th information recording layer (with i being an integer satisfying 2≦i≦N), that i-th information recording layer includes an i-th recording learning region for learning recording parameters to record data in the i-th information recording layer, and an i-th user data recording region for recording user data. The first recording learning region and the i-th recording learning region are arranged at different radial positions, and the i-th recording learning region is arranged within a region of radial positions at which the control data region is provided.

摘要翻译： 光盘包括第一信息记录层和第二至第N信息记录层（N为2以上的整数），其被配置为比第一信息记录层更靠近照射激光的一侧， 它们从第一信息记录层附近的一侧排列。 第一信息记录层包括只读控制数据区，用于学习用于记录数据的记录参数的第一记录学习区和用于记录用户数据的第一用户数据记录区。 当将第二至第N信息记录层中的至少一个作为第i信息记录层（i为满足2＆nlE; i＆nlE; N的整数）时，第i信息记录层包括第i个记录 用于学习记录参数以在第i个信息记录层中记录数据的学习区域和用于记录用户数据的第i个用户数据记录区域。 第一记录学习区域和第i记录学习区域被布置在不同的径向位置，并且第i个记录学习区域被布置在设置有控制数据区域的径向位置的区域内。

公开(公告)号：USRE41918E1

公开(公告)日：2010-11-09

申请号：US09460223

申请日：1999-12-13

申请人： Naoyasu Miyagawa ,  Yasuhiro Gotoh

发明人： Naoyasu Miyagawa ,  Yasuhiro Gotoh

IPC分类号： G09B19/017 ,  G09B23/033 ,  G09B23/088 ,  G09B7/005 ,  G09B7/042

CPC分类号： G11B7/085 ,  G11B7/0037 ,  G11B7/08505 ,  G11B7/12 ,  G11B7/124 ,  G11B7/1245 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/13925 ,  G11B19/12 ,  G11B23/0302 ,  G11B23/30 ,  G11B2007/0006

摘要： An optical disc apparatus for recording, reproducing or erasing an information signal by converging a light flux onto a recording layer through a transparent substrate. The apparatus includes one or a plurality of optical heads having a plurality of objective lenses whose aberrations have respectively been corrected for a plurality of disc substrates of different thicknesses, a cartridge for enclosing the optical disc, a discrimination hole which is formed on the cartridge, and a sensor for detecting the opening/closing state of the discrimination hole and for generating a discrimination signal. In accordance with the result of the discrimination as to the thickness of the loaded optical disc, the objective lens, in which the occurrence of the aberration is smallest, is used, so that the information signal can preferably be recorded, reproduced or erased onto/from the optical discs having different substrate thicknesses. Instead of an optical head having objective lenses, an optical head having a waveguide and a plurality of converging grating couplers whose aberrations have respectively been corrected for a plurality of disc substrates of different thicknesses is provided to achieve the same object. An optical recording/reproducing apparatus for recording, reproducing or erasing an information signal onto/from an optical disc having at least a transparent substrate and an information layer by converging a light flux on the information layer through the transparent substrate. The apparatus includes optical converging devices, with different numerical apertures, focal distances or working distances, such as objective lenses or grating lenses, for performing aberration correction over a plurality of transparent substrates of different thicknesses of optical discs and a device for discriminating the type of optical disc based on the thicknesses of the transparent substrates. One of the optical converging devices that generates the least aberration is used according to a result of the discrimination of the thickness of the optical disk loaded in the apparatus to cause the information signal to be suitably recorded, reproduced or erased onto/from the optical discs having the different substrate thicknesses.

公开(公告)号：US07701813B2

公开(公告)日：2010-04-20

申请号：US10568595

申请日：2005-07-08

申请人： Naoyasu Miyagawa

发明人： Naoyasu Miyagawa

IPC分类号： G11B7/00

CPC分类号： G11B7/0945 ,  G11B7/007 ,  G11B7/00736 ,  G11B7/0901 ,  G11B2007/0006

摘要： A method for recording and reproducing information to/from with an optical recording medium, with which either in-groove recording or on-groove recording is selected according to a type of the recording medium, and information can be recorded and reproduced with good signal quality. In this method a laser beam is reflected by an information recording layer and is received by a photodetector that has been split into at least two parts by a split line parallel to the direction of the grooves. Further, the laser beam is reflected in a region in which a groove width is greater than a width between grooves, and the method determines whether the grooves on a side where the laser beam is incident are convex or concave based on a sum signal and a difference signal of photodetection signals outputted from the photodetector.

摘要翻译： 一种用于根据记录介质的类型选择槽内记录或槽内记录的用于记录和再现信息的方法，并且可以以良好的信号质量来记录和再现信息 。 在该方法中，激光束被信息记录层反射，并且被光电检测器接收，该光电检测器通过平行于凹槽方向的分割线分成至少两部分。 此外，激光束被反射在槽宽度大于槽之间的宽度的区域中，并且该方法基于和信号确定激光束入射侧的沟槽是凸的还是凹的， 从光电检测器输出的光检测信号的差分信号。

公开(公告)号：USRE40908E1

公开(公告)日：2009-09-08

申请号：US09609829

申请日：1999-11-22

申请人： Naoyasu Miyagawa ,  Yasuhiro Gotoh

发明人： Naoyasu Miyagawa ,  Yasuhiro Gotoh

IPC分类号： G11B7/00

CPC分类号： G11B7/085 ,  G11B7/0037 ,  G11B7/08505 ,  G11B7/12 ,  G11B7/124 ,  G11B7/1245 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/13925 ,  G11B19/12 ,  G11B23/0302 ,  G11B23/30 ,  G11B2007/0006

摘要： An optical disc apparatus for recording, reproducing or erasing an information signal by converging a light flux onto a recording layer through a transparent substrate. The apparatus includes one or a plurality of optical heads having a plurality of objective lenses whose aberrations have respectively been corrected for a plurality of disc substrates of different thicknesses, a cartridge for enclosing the optical disc, a discrimination hole which is formed on the cartridge, and a sensor for detecting the opening/closing state of the discrimination hole and for generating a discrimination signal. In accordance with the result of the discrimination as to the thickness of the loaded optical disc, the objective lens, in which the occurrence of the aberration is smallest, is used, so that the information signal can preferably be recorded, reproduced or erased onto/from the optical discs having different substrate thicknesses. Instead of an optical head having objective lenses, an optical head having a waveguide and a plurality of converging grating couplers whose aberrations have respectively been corrected for a plurality of disc substrates of different thicknesses is provided to achieve the same object. An optical recording/reproducing apparatus for recording, reproducing or erasing an information signal onto/from an optical disc having at least a transparent substrate and an information layer by converging a light flux on the information layer through the transparent substrate. The apparatus includes optical converging devices, with different numerical apertures, focal distances or working distances, such as objective lenses or grating lenses, for performing aberration correction over a plurality of transparent substrates of different thicknesses of optical discs and a device for discriminating the type of optical disc based on the thicknesses of the transparent substrates. One of the optical converging devices that generates the least aberration is used according to a result of the discrimination of the thickness of the optical disc loaded in the apparatus to cause the information signal to be suitably recorded, reproduced or erased onto/from the optical discs having the different substrate thicknesses.