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1. 发明授权

US06751166B2 Phase error detection method for magnetic wall displacement type of magneto-optical recording device 失效
标题翻译：磁性壁位移型磁光记录装置的相位误差检测方法
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。

2. 发明授权

US07075881B2 Signal recording/playback apparatus, and recording compensation method and playback method used therefor 失效
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.

3. 发明授权

US07972673B2 Optical recording medium 有权
标题翻译：光记录介质
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

4. 发明授权

US07038998B2 Optical recording disk having land and groove wobbled at outer circumference side 失效
标题翻译：具有在外周侧摆动的平台和凹槽的光记录盘
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。

5. 发明申请

US20050201211A1 Annealing device and annealing method 审中-公开
标题翻译：退火装置和退火方法
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。

6. 发明申请

US20050099908A1 Playback apparatus and method, and optical disk player 审中-公开
标题翻译：播放装置和方法，以及光盘播放器
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。

7. 发明授权

US06731589B2 Substrate for optical recording media, optical recording medium, manufacturing process for optical recording media, and optical recording/reproducing method 失效
标题翻译：用于光学记录介质的基板，光学记录介质，用于光学记录介质的制造工艺，以及光学记录/再现方法
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。

8. 发明授权

US06385257B1 Frequency demodulating circuit, optical disk apparatus thereof and preformating device 失效
标题翻译：频率解调电路，其光盘装置和预处理装置
公开(公告)号：US06385257B1
公开(公告)日：2002-05-07
申请号：US09074814
申请日：1998-05-08
申请人： Minoru Tobita , Susumu Tosaka , Yoshikatsu Niwa , Shinichi Nakao , Goro Fujita
发明人： Minoru Tobita , Susumu Tosaka , Yoshikatsu Niwa , Shinichi Nakao , Goro Fujita
IPC分类号： H04L2714
CPC分类号： G11B7/24082 , G11B7/00718 , G11B7/00745 , G11B7/128 , G11B7/26 , G11B7/261 , G11B11/10565 , G11B11/10578 , G11B11/10582 , G11B20/1403 , G11B27/19 , G11B27/24 , G11B2220/2525
摘要： A frequency demodulating circuit for demodulating a frequency-modulated signal expressing digital data. The circuit includes a waveform shaping circuit for acquiring a binary signal from the frequency-modulated signal and a detector for decoding the binary signal and response to clock signals to obtain the digital data. A circuit also includes a clock signal generating circuit for generating the clock signals which have a frequency of the frequency-modulated signal corresponding to “one” of the digital data and a frequency higher than the frequency of the frequency-modulated signal by a multiple, which corresponds to a “zero” of the digital data.
摘要翻译：一种用于解调表示数字数据的频率调制信号的频率解调电路。电路包括用于从调频信号获取二进制信号的波形整形电路和用于对二进制信号进行解码和对时钟信号的响应的检测器，以获得数字数据。一个电路还包括一个时钟信号发生电路，用于产生时钟信号，该时钟信号具有对应于数字数据的“1”的频率调制信号，频率高于频率调制信号的频率倍数，其对应于数字数据的“零”。

9. 发明授权

US5978350A Optical disc and optical disc driving device 失效
标题翻译：光盘和光盘驱动装置
公开(公告)号：US5978350A
公开(公告)日：1999-11-02
申请号：US632428
申请日：1996-11-12
申请人： Minoru Tobita , Goro Fujita , Satoshi Otsuka , Tamotsu Yamagami
发明人： Minoru Tobita , Goro Fujita , Satoshi Otsuka , Tamotsu Yamagami
IPC分类号： G11B7/007 , G11B11/105 , G11B13/04 , G11B19/02 , G11B19/12 , G11B19/28 , G11B20/12 , G11B21/08 , G11B27/19 , G11B27/30 , G11B27/32 , G11B7/24
CPC分类号： G11B27/329 , G11B11/10565 , G11B11/10578 , G11B11/10595 , G11B13/04 , G11B19/02 , G11B19/12 , G11B19/28 , G11B20/1258 , G11B21/083 , G11B27/19 , G11B27/3027 , G11B7/00745 , G11B11/10597 , G11B2020/1232 , G11B2020/1265 , G11B2020/1267 , G11B2020/1285 , G11B2020/1287 , G11B2220/20 , G11B2220/218 , G11B2220/2525 , G11B2220/2537
摘要： An optical disk having a plurality of substantially concentric tracks, each of which includes a plurality of segments each comprising a servo area ARs provided with servo pits for giving servo information to a disk drive and a data area ARd. Identification marks SGM, ADM, STM1, STM2 are recorded in the servo area ARs. The identification marks SGM, ADM, STM1, STM2 provide information for identifying the respective segments depending on the recording position in the servo area ARs.
摘要翻译： PCT No.PCT / JP95 / 01682 Sec。 371日期：1996年11月12日 102（e）日期1996年11月12日PCT 1995年8月24日PCT PCT。公开号WO96 / 06433 日期1996年2月29日具有多个基本上同心的轨道的光盘，每个光盘包括多个段，每个段包括具有用于向盘驱动器和数据区ARd提供伺服信息的伺服坑的伺服区AR。识别标记SGM，ADM，STM1，STM2记录在伺服区AR中。识别标记SGM，ADM，STM1，STM2根据伺服区域AR中的记录位置提供用于识别各个段的信息。

10. 发明授权

US5469415A Optical information recording or reproducing apparatus with asymmetry compensation 失效
标题翻译：具有不对称补偿的光信息记录或再现装置
公开(公告)号：US5469415A
公开(公告)日：1995-11-21
申请号：US144874
申请日：1993-10-28
申请人： Goro Fujita , Minoru Tobita
发明人： Goro Fujita , Minoru Tobita
IPC分类号： G11B7/005 , G11B20/10 , G11B20/18 , G11B7/00
CPC分类号： G11B20/10296 , G11B20/10009 , G11B7/005
摘要： In an optical information recording or reproducing apparatus, an asymmetry detection circuit detects asymmetry values from digital RF signals reproduced from the reference area of an optical disk according to a timing signal generated by a timing signal generator. The digital RF signals are demodulated by the viterbi algorithm by a viterbi detection circuit on the basis of asymmetry values detected by an asymmetry detection circuit.
摘要翻译：在光信息记录或再现装置中，不对称检测电路根据由定时信号发生器产生的定时信号从光盘的参考区域再现的数字RF信号中检测不对称值。基于由不对称检测电路检测的不对称值，维特比检测电路通过维特比算法对数字RF信号进行解调。

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