公开(公告)号：US06751166B2

公开(公告)日：2004-06-15

申请号：US10005607

申请日：2001-12-07

申请人： Goro Fujita ,  Tetsuhiro Sakamoto ,  Minoru Tobita

发明人： Goro Fujita ,  Tetsuhiro Sakamoto ,  Minoru Tobita

IPC分类号： G11B1100

CPC分类号： G11B11/10515 ,  G11B11/1053 ,  G11B11/10595 ,  G11B20/10009

摘要： A phase error detection apparatus and method is disclosed whereby a data signal is played back at a high S/N ratio from a magneto-optical disk making use of a ghost signal by magnetic domain wall displacement detection while the playback laser poser is kept at an optimum level. First, the laser power is controlled so that the time delay of a ghost signal from a data signal may be equal to a fixed multiple of a data detection clock. Thereupon, a laser power control section searches for a point at which the amount of jitters generated is small based on a RF signal. Then, the playback laser power is adjusted so that the time delay amount of the ghost signal from the data signal may be the fixed multiple n=5 of the clock nearest to the phase delay amount set in advance of a ghost which appears in the isothermal region with a laser power with which an optimum signal characteristic is obtained. In this instance, the laser power control section searches for a peak of the 5T amplitude of the displacement phase difference controlling pattern.

摘要翻译： 公开了一种相位误差检测装置和方法，其中数据信号以高S / N比从使用鬼影信号的磁光盘通过磁畴壁位移检测重放，而播放激光器位置保持在 最佳水平。 首先，控制激光功率，使得来自数据信号的重影信号的时间延迟可以等于数据检测时钟的固定倍数。 因此，激光功率控制部基于RF信号来搜索生成的抖动量小的点。 然后，调整重放激光功率，使得来自数据信号的重影信号的时间延迟量可以是最接近出现在等温中的重影之前设置的相位延迟量的时钟的固定倍数n = 5 具有获得最佳信号特性的激光功率的区域。 在这种情况下，激光功率控制部分搜索位移相位差控制模式的5T振幅的峰值。

公开(公告)号：US20050099908A1

公开(公告)日：2005-05-12

申请号：US10950385

申请日：2004-09-28

申请人： Goro Fujita ,  Kazuhiko Fujiie ,  Yasuhito Tanaka ,  Kimihiro Saito ,  Tetsuhiro Sakamoto ,  Takeshi Miki

发明人： Goro Fujita ,  Kazuhiko Fujiie ,  Yasuhito Tanaka ,  Kimihiro Saito ,  Tetsuhiro Sakamoto ,  Takeshi Miki

IPC分类号： G11B7/24 ,  G11B5/09 ,  G11B7/00 ,  G11B7/005 ,  G11B7/007 ,  G11B27/24

CPC分类号： G11B27/24 ,  G11B7/0053 ,  G11B7/00718

摘要： The present invention provides an optical disk drive and optical disk playback method, with an improved capability of reading address information from an optical disk having address information recorded thereon by wobbling one of side walls of a recording track, with a wider tilt margin.

摘要翻译： 本发明提供了一种光盘驱动器和光盘播放方法，其具有通过以更宽的倾斜余量摆动记录轨道的一个侧壁而从其上记录有地址信息的光盘读取地址信息的能力。

公开(公告)号：US06731589B2

公开(公告)日：2004-05-04

申请号：US09747721

申请日：2000-12-22

申请人： Tetsuhiro Sakamoto ,  Goro Fujita

发明人： Tetsuhiro Sakamoto ,  Goro Fujita

IPC分类号： G11B700

CPC分类号： G11B11/10584 ,  G11B7/00718 ,  G11B7/24076 ,  G11B7/253 ,  G11B7/2531 ,  G11B7/2534 ,  G11B7/26 ,  G11B11/10578 ,  G11B2007/24304

摘要： According to the present invention, when a land-groove recording method is adopted, thermal crosstalk between a land and an adjoining groove is suppressed effectively. Inhomogeneity of a recording layer between the land and groove is suppressed effectively. A substrate for optical recording media comprises groove-like concave parts (2) and convex parts each created between adjoining concave parts. A border sidewall (4) between a concave part and an adjoining convex part (2) has a plurality of sidewall planes, that is, at least a first sidewall plane (41) that leads to the bed of the concave part and a second sidewall plane (42) that leads to the apical plane of the convex part. The first sidewall plane meets the bed of the concave part at an angle ranging from 120° to less than 180°. The second sidewall plane meets the bed of the concave part at an angle ranging from 90° to 110°. A discontinuous part (6) is produced at least along a borderline between the first sidewall plane and second sidewall plane. The presence of the discontinuous part (6) is effective in minimizing thermal crosstalk between the concave part (2) and convex part (3) and suppressing inhomogeneity of a recording layer between a land and an adjoining groove.

摘要翻译： 根据本发明，当采用槽脊记录方法时，能够有效地抑制焊盘与邻接槽之间的热串扰。 有效地抑制了陆地和凹槽之间的记录层的不均匀性。 用于光学记录介质的基板包括槽状凹部（2）和分别形成在相邻的凹部之间的凸部。 在凹部和相邻的凸部（2）之间的边界侧壁（4）具有多个侧壁面，即至少第一侧壁面（41），其通向凹部的床，第二侧壁 平面（42），其导致凸部的顶端平面。 第一侧壁平面以120°至小于180°的角度与凹部的床相遇。 第二侧壁平面以90°至110°的角度与凹部的床相遇。 至少沿着第一侧壁平面和第二侧壁平面之间的边界线产生不连续部分（6）。 不连续部分（6）的存在有效地使凹部（2）和凸部（3）之间的热串扰最小化，并且抑制焊盘和相邻凹槽之间的记录层的不均匀性。

公开(公告)号：US07972673B2

公开(公告)日：2011-07-05

申请号：US11552816

申请日：2006-10-25

申请人： Tetsuhiro Sakamoto ,  Takashi Shimouma ,  Shigeki Takagawa ,  Jun Nakano ,  Goro Fujita

发明人： Tetsuhiro Sakamoto ,  Takashi Shimouma ,  Shigeki Takagawa ,  Jun Nakano ,  Goro Fujita

IPC分类号： B32B3/02

CPC分类号： G11B20/00688 ,  G11B7/0053 ,  G11B7/259 ,  G11B20/00086 ,  G11B20/00115 ,  G11B20/00594 ,  G11B20/10 ,  G11B2220/218 ,  G11B2220/2541 ,  Y10T428/21

摘要： An optical recording medium is provided. The optical recording medium includes at least a reflective film and a cover layer on a substrate; main data by a combination of pit and land are recorded on the substrate; a write-once recording is made to be possible on the reflective film by irradiating a laser light; sub-data are recorded by a mark that is formed by the irradiation of laser light for the write-once recording with respect to the reflective film; a reproducing signal level at portion where said mark is formed increases for the land of specified length; the mark by which the reproduced level decreases at the portion where the mark is formed is formed for an optical disc recording medium manufactured by physical copy; the reflective film is composed of an Ag-alloy film of Ag100-xXx(0

摘要翻译： 提供光记录介质。 光记录介质至少包括反射膜和基底上的覆盖层; 通过凹坑和焊盘的组合的主要数据被记录在基板上; 通过照射激光使反射膜上的一次写入记录成为可能; 子数据由相对于反射膜的一次写入记录的激光照射形成的标记记录; 在所述标记形成的部分处的再现信号电平对于规定长度的地面增加; 对于通过物理复制制造的光盘记录介质，形成在形成标记部分时再现电平降低的标记; 反射膜由Ag100-xXx（0

公开(公告)号：US07038998B2

公开(公告)日：2006-05-02

申请号：US10220266

申请日：2002-01-09

申请人： Goro Fujita ,  Tetsuhiro Sakamoto

发明人： Goro Fujita ,  Tetsuhiro Sakamoto

IPC分类号： G11B7/24

CPC分类号： G11B27/24 ,  G11B7/00 ,  G11B7/007 ,  G11B7/261 ,  G11B7/263 ,  G11B27/19 ,  G11B2220/20 ,  G11B2220/2529

摘要： An optical recording medium having a wobble desirably arranged in a production process when having wobble at part of interfaces of lands and grooves is provided. An optical recording medium comprising an approximately disk-shaped disk substrate 15, formed in its surface with trenches 15a and having projections and recesses divided for every track region by the trenches 15a, on which are stacked an optical recording layer 16 having relief shapes corresponding with the trenches 15a and a protection film 17 and of a format where both regions of the projections (lands L) and the recesses (grooves G) are used as recording regions etc., wherein wobble W for providing clock information or address information is formed, between a pair of facing side walls forming each trench 15a, in a side wall portion at an inner circumferential side of the disk substrate 15 when seen from the recess (groove G) and at an outer circumferential side of the disk substrate 15 when seen from the projection (land L).

摘要翻译： 本发明提供一种光盘记录介质，其特征在于，具有摇摆的光盘记录媒体，其特征在于，具有摆动在轨迹和槽的一部分界面的制造工序。 一种光学记录介质，包括近似圆盘形的盘基片15，其表面上形成有沟槽15a，并且具有通过沟槽15a分隔每个轨道区域的突起和凹陷，叠层有具有浮雕形状的光学记录层16 对应于沟槽15a和保护膜17以及其中使用两个突起（区域L）和凹槽（槽G）的两个区域作为记录区域等的格式，其中摆动W用于提供时钟信息或地址信息 形成在从凹部（槽G）观察的盘基板15的内周侧的侧壁部和盘基板的外周侧之间的形成各沟槽15a的一对相对侧壁之间 15从投影（L）看。

公开(公告)号：US20050201211A1

公开(公告)日：2005-09-15

申请号：US10517604

申请日：2004-05-21

申请人： Goro Fujita ,  Takeshi Miki ,  Yasuhito Tanaka ,  Tetsuhiro Sakamoto ,  Kazuhiko Fujiie

发明人： Goro Fujita ,  Takeshi Miki ,  Yasuhito Tanaka ,  Tetsuhiro Sakamoto ,  Kazuhiko Fujiie

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

CPC分类号： G11B11/10582 ,  G11B11/10523 ,  G11B11/10576 ,  G11B11/10595

摘要： The present invention is directed to an annealing apparatus adapted for performing anneal processing with respect to a magneto optical recording medium, which comprises a diffraction optical unit (3) for optically separating light beams emitted from a laser light source (1) into first light beams which are the 0 (zero)-th order diffracted light beams and second and third light beams which are the first order diffracted light beams, an object lens (5) for converging the first light beams to irradiate the first light beams thus converged onto magnetic layers of guide grooves or land portions forming both sides of the guide grooves, and for converging the second and third light beams to irradiate the second and third light beams thus converged onto magnetic layers in the vicinity of the boundary portions between guide grooves and land portions, and a biaxial actuator unit (6) for controlling the object lens (5) on the basis of linear characteristic of a first tracking error signal generated on the basis of intensity distribution of light quantities of rays of return light of the first light beams so that the first light beams follow the guide grooves or the land portions.

摘要翻译： 本发明涉及一种用于对磁光记录介质进行退火处理的退火设备，该退火设备包括用于将从激光光源（1）发射的光束光学分离成第一光束的衍射光学单元（3） 它们是作为一级衍射光束的0（零）级衍射光束和第二和第三光束，用于会聚第一光束以照射第一光束的物镜（5），从而会聚到磁 形成导向槽的两侧的引导槽或台面部分的层，并且用于会聚第二和第三光束以照射第二和第三光束，从而会聚在引导槽和焊盘部分之间的边界部分附近的磁性层上 以及用于基于第一跟踪误差符号的线性特性来控制物镜（5）的双轴致动器单元（6） 基于第一光束的光量的光的强度分布产生，使得第一光束跟随引导槽或岸台部分。

公开(公告)号：US07075881B2

公开(公告)日：2006-07-11

申请号：US10173043

申请日：2002-06-18

申请人： Goro Fujita ,  Tetsuhiro Sakamoto

发明人： Goro Fujita ,  Tetsuhiro Sakamoto

IPC分类号： G11B7/24 ,  G11B7/00

CPC分类号： G11B7/126 ,  G11B7/00 ,  G11B7/0045

摘要： A signal recording/playback apparatus includes a recording data converter. The recording data converter converts on a data pattern having a large influence on adjacent tracks on an optical disk, and outputs the converted data to an optical pickup. Specifically, by performing a data converting process in which, for a data pattern having a predetermined length of at least consecutive bits having identical values, part of the bits is inverted based on a conversion table, the recording data converter compensates a recording operation. Alternatively, instead of inverting the bits, by controlling the output power and pulse width of a laser, the recording operation is compensated. The signal recording/playback apparatus includes a played-back data converter. In the data playback mode of the signal recording/playback apparatus, the data converted by the recording data converter is identified and decoded into the original data by the played-back data converter. The played-back data converter outputs the original data.

公开(公告)号：US20080199602A1

公开(公告)日：2008-08-21

申请号：US12148636

申请日：2008-04-21

申请人： Takeshi Miki ,  Kazuhiko Fujiie ,  Yasuhito Tanaka ,  Goro Fujita ,  Tetsuhiro Sakamoto

发明人： Takeshi Miki ,  Kazuhiko Fujiie ,  Yasuhito Tanaka ,  Goro Fujita ,  Tetsuhiro Sakamoto

IPC分类号： B05D5/00 ,  B05D3/06

CPC分类号： G11B11/10582 ,  G11B11/10517 ,  G11B11/10584

摘要： A method for manufacturing a magneto-optical recording medium in which reading of recorded information is performed through domain wall displacement in a reproduction layer is provided, in which magnetic separation of groove side-wall portions is performed more reliably; as a result a magneto-optical recording medium with satisfactory recording and reproduction characteristics can be provided. The method is to manufacture a magneto-optical recording medium in which on a substrate 1 having grooves 12 at least a reproduction layer and a recording layer, each of which is formed of magnetic layers, are deposited and recorded information is reproduced through domain wall displacement in the reproduction layer; and the method includes a first annealing process in which, after depositing at least the reproduction layer and recording layer on the substrate 1 on which are formed lands 11 and grooves 12, only side-wall portions 13 between adjacent lands 11 and grooves 12 are irradiated with laser light L1, and a second magnetization annealing process in which regions including adjacent side-wall portions 13 and lands between side-wall portions 13 are irradiated with laser light L2 having a spot diameter greater than the spot diameter of the laser light in the first annealing process, while applying an external magnetic field Hex.

摘要翻译： 提供了一种制造磁光记录介质的方法，其中通过再现层中的畴壁位移进行记录信息的读取，其中槽侧壁部分的磁分离更可靠地进行; 结果，可以提供具有令人满意的记录和再现特性的磁光记录介质。 该方法是制造磁光记录介质，其中在至少具有由磁层形成的再生层和记录层的凹槽12的基板1上沉积，并通过畴壁位移再现记录信息 在复制层; 并且该方法包括第一退火处理，其中在至少将再生层和记录层沉积在其上形成有焊盘11和凹槽12的基板1上之后，仅在相邻焊盘11和槽12之间照射侧壁部分13 激光L 1和第二磁化退火处理，其中包括相邻的侧壁部分13和侧壁部分13之间的区域的区域被照射具有大于激光的光斑直径的光点直径的激光L 2 在第一退火过程中，同时施加外部磁场Hex。

公开(公告)号：US20070097849A1

公开(公告)日：2007-05-03

申请号：US11552816

申请日：2006-10-25

申请人： Tetsuhiro Sakamoto ,  Takashi Shimouma ,  Shigeki Takagawa ,  Jun Nakano ,  Goro Fujita

发明人： Tetsuhiro Sakamoto ,  Takashi Shimouma ,  Shigeki Takagawa ,  Jun Nakano ,  Goro Fujita

IPC分类号： G11B3/70

CPC分类号： G11B20/00688 ,  G11B7/0053 ,  G11B7/259 ,  G11B20/00086 ,  G11B20/00115 ,  G11B20/00594 ,  G11B20/10 ,  G11B2220/218 ,  G11B2220/2541 ,  Y10T428/21

摘要： An optical recording medium is provided. The optical recording medium includes at least a reflective film and a cover layer on a substrate; main data by a combination of pit and land are recorded on the substrate; a write-once recording is made to be possible on the reflective film by irradiating a laser light; sub-data are recorded by a mark that is formed by the irradiation of laser light for the write-once recording with respect to the reflective film; a reproducing signal level at portion where said mark is formed increases for the land of specified length; the mark by which the reproduced level decreases at the portion where the mark is formed is formed for an optical disc recording medium manufactured by physical copy; the reflective film is composed of an Ag-alloy film of Ag100−xXx(0

摘要翻译： 提供光记录介质。 光记录介质至少包括反射膜和基底上的覆盖层; 通过凹坑和焊盘的组合的主要数据被记录在基板上; 通过照射激光使反射膜上的一次写入记录成为可能; 子数据由相对于反射膜的一次写入记录的激光照射形成的标记记录; 在所述标记形成的部分处的再现信号电平对于规定长度的地面增加; 对于通过物理复制制造的光盘记录介质，形成在形成标记部分时再现电平降低的标记; 反射膜由Ag 100-x X x（O

公开(公告)号：US20070008832A1

公开(公告)日：2007-01-11

申请号：US10569749

申请日：2004-08-19

申请人： Yasuhito Tanaka ,  Takeshi Miki ,  Tetsuhiro Sakamoto ,  Goro Fujita ,  Kazuhiko Fujiie

发明人： Yasuhito Tanaka ,  Takeshi Miki ,  Tetsuhiro Sakamoto ,  Goro Fujita ,  Kazuhiko Fujiie

IPC分类号： G11B11/00

CPC分类号： G11B11/10582

摘要： A laser beam from an LD 11 is irradiated onto a magnetooptic disk 33 by a predetermined power for a heat treatment. After the heat treatment, the laser beam of a power smaller than the power upon heat treatment is irradiated to the heat-treated area. Reflection light of the laser beam of the small power enters photodetectors 24 and 26 and reflection light amounts of a P wave and an S wave are detected, respectively. A differential detecting circuit 27 detects a level of a magnetooptic signal corresponding to the heat-treated area on the basis of the reflection light amounts of the P wave and the S wave. A controller 28 determines whether or not the magnetooptic signal level detected by the differential detecting circuit 28 lies within a permissible range. If it is out of the range, the power of the laser beam to execute the heat treatment is adjusted and the process of a magnetooptic disk is stopped or a message showing such a fact is displayed, or the like.

摘要翻译： 来自LD11的激光束以预定的功率照射在磁光盘33上用于热处理。 在热处理之后，将热处理后的功率小于的功率的激光束照射到热处理区域。 小功率激光束的反射光分别进入光电探测器24和26，分别检测P波和S波的反射光量。 差分检测电路27基于P波和S波的反射光量来检测与热处理区域对应的磁光信号的电平。 控制器28确定由差分检测电路28检测的磁光信号电平是否处于容许范围内。 如果超出该范围，则调整执行热处理的激光束的功率，并且停止磁光盘的处理或者显示表示这种事实的消息等。