公开(公告)号：US20080253252A1

公开(公告)日：2008-10-16

申请号：US11842185

申请日：2007-08-21

申请人： Mamoru SHOJI ,  Kenji KOISHI ,  Atsushi NAKAMURA ,  Takashi ISHIDA ,  Shuichi TASAKA

发明人： Mamoru SHOJI ,  Kenji KOISHI ,  Atsushi NAKAMURA ,  Takashi ISHIDA ,  Shuichi TASAKA

IPC分类号： G11B7/0045

CPC分类号： G11B7/24085 ,  G11B7/00456 ,  G11B11/10506 ,  G11B11/1053

摘要： A data storage medium is provided on which data is to be recorded by modulating the data to generate a plurality of recording modulation codes and irradiating a pulse-like light beam to the data storage medium, so that a plurality of recording marks and spaces which have lengths corresponding to the plurality of recording modulation codes are formed on the data storage medium. The data storage medium comprises a disc information area that includes a region on which at least one of an irradiation information of the light beam to form the recording marks and a constitution information of the recording mark is to be recorded. At least two of the plurality of recording marks are formed by the light beam emitted according to a recording pulse train. The recording pulse train comprises a first pulse which is disposed at a front and forms a leading edge of the recording mark, a last pulse which is disposed at a backend and forms a trailing edge of the recording mark, and a multi-pulse train which is disposed between the first pulse and the last pulse and forms a center of the recording mark. The multi-pulse train has a pulse period longer than T which represents a reference period of the recording modulation code. The plurality of recording marks have different lengths represented by T with each other. A number of pulses in each of the recording pulse trains is increased by one as the recording mark is increased in length by 2T. A shortest recording mark and a second shortest recording mark are constituted of a single pulse, respectively. Each of the multi-pulse trains has an equal pulse width and pulse interval in the plurality of recording marks.

摘要翻译： 提供数据存储介质，通过对数据进行调制以产生多个记录调制码并将脉冲状光束照射到数据存储介质上，从而使多个记录标记和空间具有 对应于多个记录调制码的长度形成在数据存储介质上。 数据存储介质包括盘信息区，其包括要在其上记录形成记录标记的光束的照射信息和记录标记的结构信息中的至少一个的区域。 多个记录标记中的至少两个由根据记录脉冲序列发射的光束形成。 记录脉冲串包括设置在前面并形成记录标记的前沿的第一脉冲，设置在后端并形成记录标记的后沿的最后脉冲和多脉冲串，其中 设置在第一脉冲和最后脉冲之间并形成记录标记的中心。 多脉冲串具有长于T的脉冲周期，其表示记录调制码的参考周期。 多个记录标记具有由T表示的彼此不同的长度。 随着记录标记的长度增加2T，每个记录脉冲串中的脉冲数增加1个。 最短记录标记和第二最短记录标记分别由单个脉冲构成。 每个多脉冲串在多个记录标记中具有相等的脉冲宽度和脉冲间隔。

公开(公告)号：US07215618B2

公开(公告)日：2007-05-08

申请号：US11050587

申请日：2005-02-02

申请人： Yoshihisa Adachi

发明人： Yoshihisa Adachi

IPC分类号： G11B7/00

CPC分类号： G11B7/1267 ,  G11B7/00718 ,  G11B11/1053 ,  G11B11/10595

摘要： A reverse pattern is formed in a track adjacent to a specified track on an optical recording medium with a predetermined light beam capable of writing large recording marks. Thereafter, a normal pattern is formed in an area, of an adjacent track, which is adjacent to the reverse pattern in the specified track with recording light beams of various strengths, the adjacent track being adjacent to the specified track. The specified track is read to detect a plurality of read-out signals according to individual light beam conditions. The adjacent track is read to detect a plurality of read-out signals according to individual light beam conditions. An optimum recording condition is determined for the specified track from the plurality of light beam condition and the read-out signals from the specified track and the adjacent track, and information is recorded in the specified track according to the optimum recording condition. Thus, even when there exists a difference in recording sensitivity between adjacent tracks, since the width of the recording marks can be controlled to be optimum, cross-talk between tracks during signal reproduction and cross-erase during signal recording are restrained to minimum levels, and recording density is improved.

摘要翻译： 在具有能够写入大记录标记的预定光束的光记录介质上与轨道相邻的轨道中形成反向图案。 此后，在具有各种强度的记录光束的特定轨道中与相邻图案相邻的相邻轨道的区域中形成正常图案，相邻轨迹与指定轨迹相邻。 读取指定的轨道以根据各个光束条件检测多个读出信号。 读取相邻轨道以根据各个光束条件检测多个读出信号。 根据多个光束条件和来自指定轨道和相邻轨道的读出信号确定针对指定轨迹的最佳记录条件，并且根据最佳记录条件将信息记录在指定轨道中。 因此，即使在相邻轨道之间存在记录灵敏度差异的情况下，由于可以将记录标记的宽度控制为最佳，信号再现期间的轨道和信号记录期间的交叉擦除之间的串扰被抑制到最小水平， 并且提高了记录密度。

公开(公告)号：US07193957B2

公开(公告)日：2007-03-20

申请号：US11213829

申请日：2005-08-30

申请人： Naruhiro Masui ,  Hidetoshi Ema

发明人： Naruhiro Masui ,  Hidetoshi Ema

IPC分类号： G11B7/00

CPC分类号： G11B7/126 ,  G11B7/0062 ,  G11B7/1263 ,  G11B11/1053 ,  H01S5/0427 ,  H01S5/0683

摘要： A light source drive which modulates a light source so as to cause the same to emit a light, includes: a superposition current generation part which generates a superposition current approximately corresponding to a charging/discharging current needed for a capacitance occurring in parallel to the light source for a predetermined time period near at least one of a rising-up part and a decaying-down part of a waveform of a drive current for the light source; and an addition/subtraction part which adds to or subtracts from the drive current the superposition current generated by the superposition current generation part.

摘要翻译： 调制光源以使其发光的光源驱动器包括：叠加电流产生部分，其产生大致对应于与光并行发生的电容所需的充电/放电电流的叠加电流 源于光源的驱动电流的波形的上升部分和衰减部分中的至少一个附近的预定时间段; 以及加法/减法部分，其从驱动电流增加或减去由叠加电流产生部分产生的叠加电流。

公开(公告)号：US20060285477A1

公开(公告)日：2006-12-21

申请号：US11467130

申请日：2006-08-24

申请人： Mamoru SHOJI ,  Kenji KOISHI ,  Atsushi NAKAMURA ,  Takashi ISHIDA ,  Shuichi TASAKA

发明人： Mamoru SHOJI ,  Kenji KOISHI ,  Atsushi NAKAMURA ,  Takashi ISHIDA ,  Shuichi TASAKA

IPC分类号： G11B7/24 ,  G11B7/0045

CPC分类号： G11B7/24085 ,  G11B7/00456 ,  G11B11/10506 ,  G11B11/1053

摘要： The optical data recording method comprising the steps of: modulating data to be recorded, to generate a plurality of recording modulation codes; and emitting a pulse-like light beam to an optical disc, so that a plurality of recording marks and spaces which have lengths corresponding to the plurality of recording modulation codes are formed on the optical disc. In the optical data recording method, at least two of the plurality of recording marks comprises: a first pulse which is disposed at a front and forms a leading edge of the recording mark, a last pulse which is disposed at a backend and forms a trailing edge of the recording mark, and a multi-pulse train which is disposed between the first pulse and the last pulse and forms a center of the recording mark. The multi-pulse train has a pulse period longer than T which represents a reference period of the recording modulation code.

摘要翻译： 该光学数据记录方法包括以下步骤：调制要记录的数据，以产生多个记录调制码; 并向光盘发射脉冲状光束，使得在光盘上形成具有与多个记录调制码对应的长度的多个记录标记和空间。 在光学数据记录方法中，多个记录标记中的至少两个记录标记包括：设置在前面并形成记录标记的前沿的第一脉冲，设置在后端并形成尾部的最后脉冲 记录标记的边缘，以及设置在第一脉冲和最后脉冲之间并形成记录标记的中心的多脉冲串。 多脉冲串具有长于T的脉冲周期，其表示记录调制码的参考周期。

公开(公告)号：US07050377B1

公开(公告)日：2006-05-23

申请号：US10657121

申请日：2003-09-09

申请人： Natsuko Nobukuni ,  Michikazu Horie

发明人： Natsuko Nobukuni ,  Michikazu Horie

IPC分类号： G11B7/00

CPC分类号： G11B7/0062 ,  G11B7/00456 ,  G11B7/126 ,  G11B7/243 ,  G11B7/2534 ,  G11B7/2585 ,  G11B11/10506 ,  G11B11/10528 ,  G11B11/1053 ,  G11B11/10595 ,  G11B2007/24304 ,  G11B2007/24306 ,  G11B2007/24308 ,  G11B2007/2431 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B2007/2432

摘要： An optical recording method for recording mark length-modulated information on a recording medium by using a plurality of recording mark lengths. The optical recording method comprises the steps of: when a time length of one recording mark is denoted nT (T is a reference clock period equal to or less than 25 ns, and n is a natural number equal to or more than 2), (i) dividing the time length of the recording mark nT into η1T, α1T, β1T, α2T, β2T, . . . , α1T, β1T, αmT, βmT, η2T in that order (m is a pulse division number; Σi(αi+βi)+η1+η2=n; αi (1≦i≦m) is a real number>0; βi (1≦i≦m−1) is a real number>0; βm is a real number≧0; and η1 is a real number of −2≦η1≦2 and η2 is a real number of −2≦η2≦2); radiating recording light with a recording power Pwi in a time duration of αiT (1≦i≦m), and radiating recording light with a bias power Pbi in a time duration of βiT (1≦i≦m), the bias power being Pbi

公开(公告)号：US06934100B2

公开(公告)日：2005-08-23

申请号：US09997933

申请日：2001-11-30

申请人： Hiroaki Ueno

发明人： Hiroaki Ueno

IPC分类号： H04N17/06 ,  G11B5/00 ,  G11B5/02 ,  G11B5/09 ,  G11B5/455 ,  G11B11/105 ,  G11B20/10 ,  G11B27/36

CPC分类号： G11B27/36 ,  G11B5/09 ,  G11B11/1053 ,  G11B20/10009 ,  G11B2005/001 ,  G11B2220/20

摘要： Method of accurately measuring various kinds of non-linear transition shifts (NLTSs) in the magnetic recording/reproduction using an MR-type reproducing head is provided.According to the method, the data of a reference bit-string pattern are sent, as reference signals, to a magnetic disk 2 via a head IC 5 and a magnetic head 3 so as to be magnetically recorded. A first predetermined harmonic component Vnref is measured from the reproduced signals of the record data detected by the magnetic head 3, a bit-string pattern is selected from plural kinds of predetermined bit-string patterns, the data of the selected bit-string pattern are sent, as to-be-measured signals, to the magnetic disk 2, a second predetermined harmonic component Vnpat is measured from the reproduced signals, and the NLTS is calculated from Vnref and Vnpat.

摘要翻译： 提供了使用MR型再现头在磁记录/再现中精确测量各种非线性跃迁（NLTS）的方法。 根据该方法，将基准比特串图案的数据作为参考信号通过头IC5和磁头3发送到磁盘2，以进行磁记录。 根据由磁头3检测到的记录数据的再现信号测量第一预定谐波分量Vnref，从多种预定位串模式中选择位串模式，所选位串模式的数据为 将被测量的信号发送到磁盘2，根据再现信号测量第二预定谐波分量Vnpat，并且从Vnref和Vnpat计算NLTS。

公开(公告)号：US20050041552A1

公开(公告)日：2005-02-24

申请号：US10501500

申请日：2003-10-09

申请人： Mamoru Shoji ,  Kenji Koishi ,  Atsushi Nakamura ,  Takashi Ishida ,  Shuichi Tasaka

发明人： Mamoru Shoji ,  Kenji Koishi ,  Atsushi Nakamura ,  Takashi Ishida ,  Shuichi Tasaka

IPC分类号： G11B3/00 ,  G11B5/09 ,  G11B7/00 ,  G11B7/0045 ,  G11B7/013 ,  G11B11/105

CPC分类号： G11B7/24085 ,  G11B7/00456 ,  G11B11/10506 ,  G11B11/1053

摘要： The optical data recording method comprising the steps of: modulating data to be recorded, to generate a plurality of recording modulation codes; and emitting a pulse-like light beam to an optical disc, so that a plurality of recording marks and spaces which have lengths corresponding to the plurality of recording modulation codes are formed on the optical disc. In the optical data recording method, at least two of the plurality of recording marks comprises: a first pulse which is disposed at a front and forms a leading edge of the recording mark, a last pulse which is disposed at a backend and forms a trailing edge of the recording mark, and a multi-pulse train which is disposed between the first pulse and the last pulse and forms a center of the recording mark. The multi-pulse train has a pulse period longer than T which represents a reference period of the recording modulation code.

摘要翻译： 该光学数据记录方法包括以下步骤：调制要记录的数据，以产生多个记录调制码; 并向光盘发射脉冲状光束，使得在光盘上形成具有与多个记录调制码对应的长度的多个记录标记和空间。 在光学数据记录方法中，多个记录标记中的至少两个记录标记包括：设置在前面并形成记录标记的前沿的第一脉冲，设置在后端并形成尾部的最后脉冲 记录标记的边缘，以及设置在第一脉冲和最后脉冲之间并形成记录标记的中心的多脉冲串。 多脉冲串具有长于T的脉冲周期，其表示记录调制码的参考周期。

公开(公告)号：US06678220B1

公开(公告)日：2004-01-13

申请号：US09583480

申请日：2000-05-31

申请人： Hideki Saga

发明人： Hideki Saga

IPC分类号： G11B700

CPC分类号： G11B11/1053 ,  G11B7/094 ,  G11B7/1267 ,  G11B11/10556 ,  G11B11/10595

摘要： An information recording apparatus includes an energy generation device for generating recording energy; a position control device for controlling a position of irradiation on the recording medium with an output of the energy generation device; a drive device for driving the energy generation device; a switching device for switching information based on user data and test information to supply the two kinds of information selectively to the drive device; a reading device for reading the marks recorded on the recording medium; an evaluation device for evaluating a reproduced signal obtained by the reading device; and a recording condition control device for controlling a recording condition on the basis of an evaluation result obtained by the evaluation device, wherein, when the marks used for recording the test information are to be reproduced, controlling operation of the position control device is changed to be different from that used for recording the test information.

公开(公告)号：US06661760B2

公开(公告)日：2003-12-09

申请号：US10141981

申请日：2002-05-10

申请人： Natsuko Nobukuni ,  Michikazu Horie

发明人： Natsuko Nobukuni ,  Michikazu Horie

IPC分类号： G11B700

CPC分类号： G11B7/0062 ,  G11B7/00456 ,  G11B7/126 ,  G11B7/243 ,  G11B7/2534 ,  G11B7/2585 ,  G11B11/10506 ,  G11B11/10528 ,  G11B11/1053 ,  G11B11/10595 ,  G11B2007/24304 ,  G11B2007/24306 ,  G11B2007/24308 ,  G11B2007/2431 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B2007/2432

摘要： An optical recording method for recording mark length-modulated information on a recording medium by using a plurality of recording mark lengths. The optical recording method comprises the steps of: when a time length of one recording mark is denoted nT (T is a reference clock period equal to or less than 25 ns, and n is a natural number equal to or more than 2), (i) dividing the time length of the recording mark nT into &eegr;1T, &agr;1T, &bgr;1T, &agr;2T, &bgr;2T, . . . , &agr;iT, &bgr;iT, . . . , &agr;mT, &bgr;mT, &eegr;2T  in that order (m is a pulse division number; &Sgr;i(&agr;i+&bgr;i)+&eegr;1+&eegr;2=n; &agr;i (1≦i≦m) is a real number >0; &bgr;i (1≦i≦m−1) is a real number>0; &bgr;m is a real number ≧0; and &eegr;1 is a real number of −2≦&eegr;1≦2 and &eegr;2 is a real number of −2≦&eegr;2≦2); radiating recording light with a recording power Pwi in a time duration of &agr;iT (1≦i≦m), and radiating recording light with a bias power Pbi in a time duration of &bgr;iT (1≦i≦m), the bias power being Pbi

摘要翻译： 一种用于通过使用多个记录标记长度将标记长度调制信息记录在记录介质上的光学记录方法。 光记录方法包括以下步骤：当一个记录标记的时间长度表示为nT（T是等于或小于25ns的参考时钟周期，n是等于或大于2的自然数）时，（ i）将记录标记nT intoin的时间长度除以（m是脉冲数; Sigmai（alphai + betai）+ eta1 + eta2 = n; alphai（1≤i≤m）是实数] 0; betai（1 <= i <= m-1）是实数> 0; betam是实数> = 0; eta1是-2 <= ETA1 <= 2的实数，ETA2是实数 -2 <= ETA2 <= 2）;以alphaiT（1 <= i <= m）的持续时间内记录具有记录功率Pwi的记录光，并且以具有偏置功率Pbi的记录光在 betaiT（1 <= i <= m），偏置功率为Pbi = 1.25。

公开(公告)号：US06545954B2

公开(公告)日：2003-04-08

申请号：US10080549

申请日：2002-02-25

申请人： Hirofumi Sukeda ,  Hideki Saga

发明人： Hirofumi Sukeda ,  Hideki Saga

IPC分类号： G11B1100

CPC分类号： G11B7/1267 ,  G11B11/1051 ,  G11B11/10521 ,  G11B11/1053 ,  G11B11/10595 ,  G11B27/36 ,  G11B2220/2525

摘要： A high-speed large capacity file system is built in which the track density is improved by applying a highly precise magnetic domain width control technique to a light pulse-irradiated magnetic field modulation magnetooptical disk device which can be overwritten and is suitable for the improvement of the bit density. For the purpose, bipolar magnetic domains having edges of positive and negative polarities with respect to the direction of movement of a light spot are formed and the recording condition is optimized. Normal recording is carried out on the basis of the result of the optimization of the recording condition.