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11. 发明授权

US06771576B2 Optical reproduction apparatus 失效
标题翻译：光学再现装置
公开(公告)号：US06771576B2
公开(公告)日：2004-08-03
申请号：US09833405
申请日：2001-04-11
申请人： Tetsuya Okumura , Shigemi Maeda
发明人： Tetsuya Okumura , Shigemi Maeda
IPC分类号： G11B700
CPC分类号： G11B7/126 , G11B7/005 , G11B7/00745 , G11B11/10515 , G11B11/10595 , G11B20/10009
摘要： An optical reproduction apparatus in accordance with the present invention has a gain control circuit for controlling a gain of an amplifier circuit which amplifies a reproduction signal in accordance with amplitudes of the reproduction signal from an optical recording medium. The amplitude is sent to a power control calculation circuit which controls the reproduction power of a light beam in accordance with the amplitude. The gain control circuit has a slower response speed than that of the power control circuit at least during a period when the power control circuit controls the reproduction power. This allows to provide an optical reproduction apparatus that can realize the stable reproduction power and automatic gain control even to the unevenness of the amplitudes of the reproduction signal.
摘要翻译：根据本发明的光学再现装置具有用于控制放大器电路的增益的增益控制电路，该放大器电路根据来自光学记录介质的再现信号的幅度来放大再现信号。振幅被发送到功率控制计算电路，其根据振幅控制光束的再现功率。至少在功率控制电路控制再现功率的期间，增益控制电路的响应速度比功率控制电路慢。这允许提供即使对于再现信号的幅度的不均匀性也能够实现稳定的再现功率和自动增益控制的光学再现装置。

12. 发明授权

US06584050B1 Optical recording device, optical reproducing device, and optical memory medium 有权
标题翻译：光学记录装置，光学再现装置和光学存储介质
公开(公告)号：US06584050B1
公开(公告)日：2003-06-24
申请号：US09559898
申请日：2000-04-26
申请人： Tetsuya Okumura , Shigemi Maeda
发明人： Tetsuya Okumura , Shigemi Maeda
IPC分类号： G11B700
CPC分类号： G11B7/126 , G11B7/0045 , G11B7/005 , G11B7/00745 , G11B11/10515 , G11B11/10595
摘要： A recording-reproducing device includes a power control pattern generating circuit for generating a power control pattern to be used for control of a reproducing power of a semiconductor laser, a phase adjusting pattern generating circuit for adjusting a phase of a reproducing clock to be used upon reproduction of the power control pattern, a synchronous pattern generating circuit for generating a synchronous pattern to be recorded immediately before the phase adjusting pattern, and a recording data selecting circuit. The recording data selecting circuit consecutively selects an output of the phase adjusting pattern generating circuit, an output of the synchronous pattern generating circuit, and an output of the power control pattern generating circuit, and records these outputs in a front part of each sector of a magneto-optical disk.
摘要翻译：一种记录再现装置，包括：功率控制模式发生电路，用于产生用于控制半导体激光器的再现功率的功率控制模式;相位调整模式发生电路，用于调节要用于的半导体激光器的再现时钟的相位; 功率控制模式的再现，用于产生要在相位调整模式之前记录的同步模式的同步模式产生电路和记录数据选择电路。记录数据选择电路连续地选择相位调整图形生成电路的输出，同步图形生成电路的输出和功率控制图形生成电路的输出，并将这些输出记录在每个扇区的前部磁光盘。

13. 发明授权

US06404717B1 Optical reproducing device and optical memory medium 失效
标题翻译：光学再现装置和光学存储介质
公开(公告)号：US06404717B1
公开(公告)日：2002-06-11
申请号：US09163516
申请日：1998-09-30
申请人： Tetsuya Okumura , Hiroshi Fuji , Shigemi Maeda
发明人： Tetsuya Okumura , Hiroshi Fuji , Shigemi Maeda
IPC分类号： G11B509
CPC分类号： G11B7/126 , G11B7/005 , G11B7/00745 , G11B11/10584 , G11B11/10595 , G11B20/10 , G11B27/3027 , G11B2220/2525
摘要： A magneto-optical disk reproducing device includes a clock producing circuit, which, on the basis of a reproducing signal from recorded marks recorded in a magneto-optical disk, produces a timing offset from peak positions of the reproducing signal; an A/D converter, which samples the reproducing signal in accordance with the timing, and outputs a reproducing signal quantity; and a short mark signal quantity averaging circuit and a long mark signal quantity averaging circuit, each of which averages a plurality of reproducing signal quantities. When projecting a light beam onto a magneto-optical disk, the magneto-optical disk reproducing device controls light quantity of the light beam on the basis of a ratio between the respective values outputted by the foregoing averaging circuits. By this means, the A/D converter is able to sample the reproducing signal at more timings than when a reproducing signal is detected at peak positions thereof, and the magneto-optical disk reproducing device can detect the foregoing ratio more precisely. Consequently, the magneto-optical disk can control the light quantity of the light beam more accurately.
摘要翻译：磁光盘再现装置包括时钟产生电路，其基于记录在磁光盘中的记录标记的再现信号，产生与再现信号的峰值位置的定时偏移; A / D转换器，其根据定时对再现信号进行采样，并输出再现信号量; 以及短标记信号量平均电路和长标记信号量平均电路，其中每个均衡多个再现信号量。当将光束投影到磁光盘上时，磁光盘再现装置基于由上述平均电路输出的各个值之间的比率来控制光束的光量。通过这种方式，A / D转换器能够比在其峰值位置处检测到再现信号时更多的定时对再现信号进行采样，并且磁光盘再现装置可以更精确地检测上述比率。因此，磁光盘可以更精确地控制光束的光量。

14. 发明申请

US20050193318A1 Adaptive waveform equalization for viterbi-decodable signal and signal quality evaluation of viterbi-decodable signal 有权
标题翻译：维特比可解码信号的自适应波形均衡和维特可解码信号的信号质量评估
公开(公告)号：US20050193318A1
公开(公告)日：2005-09-01
申请号：US10625853
申请日：2003-07-22
申请人： Tetsuya Okumura , Shigemi Maeda
发明人： Tetsuya Okumura , Shigemi Maeda
IPC分类号： G11B20/10 , H03M13/03 , H04L25/03
CPC分类号： H04L25/03038 , G11B7/1263 , G11B20/10009 , G11B20/10046 , G11B20/10101 , G11B20/10481 , H04L2025/03617
摘要： The waveform equalizing device includes: an FIR filter for generating an equalized signal pattern y(i, n) on the basis of equalization of a waveform of the reproduced signal pattern u(i, n); a Viterbi decoding circuit for detecting a path metric difference s(n) between a correct path determined as a survivor path and an error path which fails to survive the correct path in Viterbi decoding based on the equalized signal pattern y(i, n); a target register for setting a target value ds for the path metric difference s(n); and a tap coefficients update circuit for adapting the equalization according to an error of the detected path metric difference from the target value. The tap coefficients update circuit adapts equalization properties so that the mean square error is minimized, thereby achieving a satisfactory result in lowering the error rate.
摘要翻译：波形均衡装置包括：FIR滤波器，用于基于再现信号模式u（i，n）的波形的均衡生成均衡信号模式y（i，n）; 维特比解码电路，用于基于均衡的信号模式y（i，n）来检测确定为幸存路径的正确路径和在维特比解码中不能存活正确路径的错误路径之间的路径度量差s（n）; 用于设置路径度量差s（n）的目标值ds的目标寄存器; 以及抽头系数更新电路，用于根据检测到的路径度量差与目标值的误差来适配均衡。抽头系数更新电路适应均衡特性，使得均方误差最小化，从而在降低误码率方面实现令人满意的结果。

15. 发明授权

US06741527B2 Magneto-optical recording medium and magneto-optical recording and reproducing device capable of controlling reproduction power based on long recorded marks 失效
标题翻译：磁光记录介质和能够基于长记录标记控制再现功率的磁光记录和再现装置
公开(公告)号：US06741527B2
公开(公告)日：2004-05-25
申请号：US09557483
申请日：2000-04-24
申请人： Tetsuya Okumura , Shigemi Maeda
发明人： Tetsuya Okumura , Shigemi Maeda
IPC分类号： G11B1100
CPC分类号： G11B7/126 , G11B7/00745 , G11B11/10515 , G11B11/10584 , G11B11/10595 , G11B27/3027 , G11B2220/2525
摘要： A magneto-optical disk recording and reproducing device, which carries out recording and reproducing for a magnetic super-resolution magneto-optical disk including a recording layer and reproducing layer, has a recording data processing circuit which records long recording marks at different positions between adjacent tracks in a radius direction, each of the long recording marks being larger in diameter than an aperture formed on the reproducing layer by projecting thereon the light beam. According to this arrangement, it is possible to continuously reproduce a data recording area with high accuracy and optimum reproducing power without being affected by adjacent tracks.
摘要翻译：一种用于对包括记录层和再现层的磁超分辨率磁光盘执行记录和再现的磁光盘记录和再现装置具有记录数据处理电路，其在相邻的不同位置之间的不同位置记录长记录标记沿着半径方向的轨迹，每个长记录标记的直径大于通过在其上投射光束而在再现层上形成的孔。根据这种配置，可以不受相邻轨迹的影响而以高精度和最佳的再现功率连续再现数据记录区域。

16. 发明授权

US07474598B2 Optical reproducing device that controls the strength of the light beam during reproduction 失效
标题翻译：在再现期间控制光束的强度的光学再现装置
公开(公告)号：US07474598B2
公开(公告)日：2009-01-06
申请号：US10082466
申请日：2002-02-25
申请人： Tetsuya Okumura , Shigemi Maeda
发明人： Tetsuya Okumura , Shigemi Maeda
IPC分类号： G11B7/135
CPC分类号： G11B7/1267 , G11B7/005 , G11B7/00736 , G11B11/10515 , G11B11/10595
摘要： An optical reproducing device is provided with predetermined length mark signal measurement means which measures amplitude values of a 2T mark and an 8T mark, which are a short reproducing power control mark and a long reproducing power control marks, respectively, from information data recorded in an magneto-optical disk. Reproducing power of a light beam is controlled by a laser power control circuit, based on the amplitude values of the 2T mark and the 8T mark. The predetermined length mark signal measurement means detects a specific pattern including the 2T mark from a bit arrangement pattern of the information data, and measures the amplitude value of the 2T mark correponding only to the 2T mark included in the specific pattern. This structure can provide an optical reproducing device which can maintain the reproducing power at an optimum value and reduce the probability of reading errors, without reducing the utilization ratio of an optical recording medium.
摘要翻译：光学再现装置具有预定的长度标记信号测量装置，它们分别测量作为短再现功率控制标记和长再现功率控制标记的2T标记和8T标记的振幅值，该信号记录在磁光盘。基于2T标记和8T标记的振幅值，由激光功率控制电路控制光束的再现功率。预定长度标记信号测量装置从信息数据的位排列模式中检测包括2T标记的特定图案，并且仅测量与特定图案中包括的2T标记相对应的2T标记的振幅值。该结构可以提供一种光学再现装置，其可以将再现功率保持在最佳值，并且降低读取错误的可能性，而不降低光学记录介质的利用率。

17. 发明授权

US06600715B2 Optical reproducing device and control method thereof 有权
公开(公告)号：US06600715B2
公开(公告)日：2003-07-29
申请号：US09955827
申请日：2001-09-19
申请人： Tetsuya Okumura , Shigemi Maeda
发明人： Tetsuya Okumura , Shigemi Maeda
IPC分类号： G11B724
CPC分类号： G11B7/126 , G11B11/10515 , G11B11/10595 , G11B20/10481 , G11B20/1816 , G11B27/36 , G11B2220/216 , G11B2220/2525 , G11B2220/2562
摘要： In an optical reproducing device in accordance with the present invention, based on an error rate used in a test read for determining an optimal reproducing power, the value of an error rate corresponding to the maximum burst error which can be corrected by an error correction circuit is obtained. With this structure, an error caused when reproducing power deviates from the optimal reproducing power determined by the test read due to an control error can be corrected by the error detection circuit.

18. 发明授权

US6125085A Optical recording method and device for optimally controlling the width of the recording marks 失效
标题翻译：用于最佳地控制记录标记宽度的光记录方法和装置
公开(公告)号：US6125085A
公开(公告)日：2000-09-26
申请号：US108472
申请日：1998-07-01
申请人： Hiroshi Fuji , Tetsuya Okumura , Shigemi Maeda
发明人： Hiroshi Fuji , Tetsuya Okumura , Shigemi Maeda
IPC分类号： G11B7/007 , G11B7/013 , G11B7/125 , G11B11/105 , G11B11/00
CPC分类号： G11B7/126 , G11B11/1053 , G11B11/10595 , G11B7/007 , G11B7/24085
摘要： A method and apparatus are provided for optimally controlling the width of recording marks formed by a light beam on an optical recording medium in an optical recording apparatus. The method is accomplished by selecting and storing in a storage device a predetermined optimal read signal value, and then setting a plurality of selectable predetermined recording conditions in the optical recording apparatus. These conditions differ from one another in the quantity of light in the light beam, or in the strength of an external magnetic field. In the optical recording apparatus, a set of first test patterns then are recorded by the light beam on separate first tracks of the optical recording medium under each of the predetermined conditions. Similarly, a second test track is recorded onto the optical recording medium under the same predetermined conditions adjacent to each of the first test tracks. The first test tracks are thereafter read by the optical recording apparatus, and the amplitude of the read signals is stored in the storage device, along with an indication of the predetermined recording signal condition under which it was generated. Finally, using a comparison device, the stored signal quantities are compared to the predetermined optimal read signal value. The optimal one of the predetermined recording conditions to be used by the optical recording apparatus is determined to be the condition associated with the one of the stored signals that most closely approximates the predetermined optimal signal value.
摘要翻译：提供了一种方法和装置，用于最佳地控制光记录装置中的光记录介质上由光束形成的记录标记的宽度。该方法通过在存储装置中选择和存储预定的最佳读取信号值，然后在光学记录装置中设置多个可选择的预定记录条件来实现。这些条件在光束中的光量或外部磁场的强度彼此不同。在光学记录装置中，在每个预定条件下，将一组第一测试图案由光束记录在光学记录介质的分开的第一轨道上。类似地，在与每个第一测试轨道相邻的相同的预定条件下，将第二测试轨迹记录在光学记录介质上。随后由光学记录装置读取第一测试轨迹，并将读出的信号的幅度与其产生的预定记录信号条件的指示一起存储在存储装置中。最后，使用比较装置，将所存储的信号量与预定的最佳读取信号值进行比较。将由光学记录装置使用的预定记录条件中的最佳一个确定为与最接近预定最佳信号值的存储信号之一相关联的条件。

19. 发明授权

US07683968B2 Image-taking apparatus 有权
标题翻译：摄像仪
公开(公告)号：US07683968B2
公开(公告)日：2010-03-23
申请号：US11654642
申请日：2007-01-18
申请人： Tatsuhiko Hagihara , Naoyuki Nishikawa , Akihiro Maejima , Nobuyoshi Maezono , Tetsuya Okumura
发明人： Tatsuhiko Hagihara , Naoyuki Nishikawa , Akihiro Maejima , Nobuyoshi Maezono , Tetsuya Okumura
IPC分类号： G02B13/16 , H04N5/225
CPC分类号： G02B27/0006 , B08B1/002 , G03B17/02
摘要： An image-taking apparatus which captures object light to take an image includes: an optical device through which the object light is transmitted; an image pickup device which generates an image signal representing an object image; and a cleaning section which is deformed by receiving a predetermined stimulus, the cleaning section being brought into contact with, and being separated from, the optical device and/or the image pickup device to clean substances attached to the contact portion. The apparatus further includes: a stimulus application section which applies the stimulus to the cleaning section; and a control section which controls the deformation of the cleaning section by controlling the stimulus applied from the stimulus application section, and which thus causes the cleaning section to clean the contact portion.
摘要翻译：拍摄物体拍摄图像的拍摄装置包括：透过物体光的光学装置; 图像拾取装置，其生成表示对象图像的图像信号; 以及通过接收预定的刺激而变形的清洁部，所述清洁部与所述光学装置和/或所述图像拾取装置接触并且与所述图像拾取装置分离，以清洁附着到所述接触部分的物质。该装置还包括：将刺激施加到清洁部的刺激施加部; 以及控制部，其通过控制从刺激施加部施加的刺激来控制清洁部的变形，并且由此使得清洁部清洁接触部。

20. 发明申请

US20050018320A1 Method of holding plastic lens and plastic lens holding structure 失效
公开(公告)号：US20050018320A1
公开(公告)日：2005-01-27
申请号：US10895084
申请日：2004-07-21
申请人： Tetsuya Okumura
发明人： Tetsuya Okumura
IPC分类号： G02B7/02
CPC分类号： G02B7/026
摘要： A plastic lens is fixedly held in precise position a lens holder by cramming a deformable retaining ring between a front collar and a periphery of the plastic lens loosely put in an annular mounting space formed in the lens holder and crushing the front collar against the retaining ring so as thereby to rivet the plastic lens to the lens holder.

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