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    • 1. 发明申请
    • OPTICAL RECORDING AND REGENERATING APPARATUS
    • 光学记录和再生设备
    • US20110080815A1
    • 2011-04-07
    • US12893069
    • 2010-09-29
    • Hideharu MIKAMIKoichi WatanabeHarukazu Miyamoto
    • Hideharu MIKAMIKoichi WatanabeHarukazu Miyamoto
    • G11B20/00
    • G11B7/0065G11B7/00781G11B7/128G11B7/24088
    • The present invention achieves an optical recording and regenerating apparatus focusing two opposed beams of light at a same place in an optical recording medium to record a standing wave generated by interference of the two beams of light. In the apparatus, phase information is recorded in the optical recording medium by a phase modulating means for modulating phase of one of the two beams of light. The generation reference light generated from a light source is allowed to interfere with regenerated light generated by projecting one of the two beams of light onto the optical recording medium to generate three or more beams of interfering light having different interference phases are simultaneously generated. The three or more beams of interfering light are then detected, and the phase modulated by the phase modulating means is demodulated from an output of the detector.
    • 本发明实现了在光记录介质中的相同位置聚焦两个相对的光束的光学记录和再生装置,以记录由两束光的干涉产生的驻波。 在该装置中,通过用于调制两束光之一的相位的相位调制装置将相位信息记录在光学记录介质中。 从光源产生的生成参考光被允许同时产生通过将两个光束中的一个投影到光学记录介质上而产生三个或更多个具有不同干涉相位的干涉光束的再生光。 然后检测三个或更多个干涉光束,并且由相位调制装置调制的相位从检测器的输出解调。
    • 2. 发明授权
    • Optical information detecting method, optical head, and optical disc apparatus utilizing plural photodetectors
    • 光信息检测方法,光头,利用多个光检测器的光盘装置
    • US07750276B2
    • 2010-07-06
    • US11852361
    • 2007-09-10
    • Harukazu MiyamotoHideharu MikamiTakeshi Shimano
    • Harukazu MiyamotoHideharu MikamiTakeshi Shimano
    • G02B27/40
    • G11B7/1356G11B7/005G11B7/13G11B2007/0013
    • In multilayer optical discs and high-speed optical discs, the amount of reproduction light per unit time greatly decreases and the reproduction signal quality (S/N) significantly drops due to the low effective reflectivity and the short read time of the medium. These problems are solved by causing reflected signal light from the optical disc and reference light, which is separated from the same light source and introduced into a detector without being shone onto the optical disc, to interference with each other on the detector. Detector outputs having four different interference states are simultaneously obtained, the interference states being displaced at intervals of 90° in terms of the phase relationship between the reference light and the signal. Based on a operation of the four detector outputs, a reproduction signal can be obtained that is stable at all times and amplified with high quality, even when there is an optical path length variation due to disc undulations.
    • 在多层光盘和高速光盘中,由于介质的有效反射率低和读取时间短,每单位时间的再现光量大大降低,再现信号质量(S / N)显着下降。 这些问题通过使来自光盘的反射信号光和从相同光源分离并被引入检测器而不被照射到光盘上的参考光在检测器上彼此干涉来解决。 同时获得具有四种不同干扰状态的检测器输出,以参考光和信号之间的相位关系为90°的间隔移位干涉状态。 基于四个检测器输出的操作,即使当由于盘起伏而导致光程长度变化时,也可以始终获得稳定的高质量放大的再现信号。
    • 3. 发明授权
    • Optical information recording/reproducing apparatus and optical information reproducing apparatus
    • 光信息记录/再现装置和光信息再现装置
    • US08659982B2
    • 2014-02-25
    • US12961571
    • 2010-12-07
    • Hideharu MikamiHarukazu Miyamoto
    • Hideharu MikamiHarukazu Miyamoto
    • G11B20/00G11B7/00G11B7/135G11B27/36
    • G11B7/083G03H2001/0441G03H2210/562G11B7/00781G11B2007/00656
    • In a system of detecting an interference light with a light not irradiated onto an optical disc to increase the S/N ratio, it is difficult to stably acquire a reproduced signal with a simple configuration. Since the recording density is not improved, an improvement in transfer rate is difficult. In an optical information recording/reproducing apparatus where two optical beams face each other and are focused at the same place of a recording medium to record a standing wave developed by interference of the two optical beams, a phase difference of the two optical beams is modulated in a multiple stage and recorded. During reproduction, an interference light of a reproduced light from the recording medium and another reproduction reference light is detected as a reproduced signal, and a phase servo control stabilizing the phase of interference during reproduction by using a low frequency component of the reproduced signal is conducted.
    • 在利用未照射到光盘上的光来检测干涉光以提高S / N比的系统中,难以以简单的结构稳定地获取再生信号。 由于记录密度没有改善,传输速率的提高是困难的。 在其中两个光束彼此面对并聚焦在记录介质的相同位置以记录由两个光束的干涉产生的驻波的光信息记录/再现装置中,两个光束的相位差被调制 在多个阶段并记录下来。 在再现期间,检测来自记录介质的再现光的干涉光和另一个再现参考光作为再现信号,并且通过使用再现信号的低频分量来进行稳定再现期间的干扰相位的相位伺服控制 。
    • 5. 发明授权
    • Optical head and optical disk device
    • 光头和光盘装置
    • US08023390B2
    • 2011-09-20
    • US12025797
    • 2008-02-05
    • Takeshi ShimanoHarukazu MiyamotoHideharu MikamiJiro Hashizume
    • Takeshi ShimanoHarukazu MiyamotoHideharu MikamiJiro Hashizume
    • G11B7/135
    • G11B7/1378G11B7/0903G11B7/1353G11B7/1356G11B7/1359
    • An interference type optical head and an optical disk device that can easily adjust an optical path length difference of a couple of lights, ensure higher signal amplification effect, and are suitable for reduction in size are provided in order to improve a regeneration signal quality with amplification of signal in the case where reflectivity of each layer must be lowered and relative noise for the signal increases because read speed is high in a multilayer optical disk. In view of essentially improving an S/N ratio of the regeneration signal in high-speed rotation of a multilayer disk, a plurality of interference phases are generated and an optical system for differential calculation has been reduced in size with an angular selective polarization conversion element in the optical disk device for amplifying the signal with interference of the light not radiated to the disk with the reflected light from the disk. Moreover, adjustment of reflection mirror angle of the reference light is no longer required by using a corner cube prism as the reference light reflection mirror and highly accurate signal detection can also be realized with a simplified structure.
    • 可以容易地调整两个光的光程长度差的干涉型光头和光盘装置,确保更高的信号放大效果,并且适合于减小尺寸,以便通过放大来提高再生信号质量 在多层光盘中的读取速度高的情况下,必须降低每一层的反射率和信号的相对噪声的信号。 鉴于在多层盘的高速旋转中基本上提高再生信号的S / N比,产生多个干涉相位,并且用角度选择偏振转换元件的差分计算用光学系统的尺寸减小了 在光盘装置中,用于将没有辐射到盘的光的信号与来自盘的反射光放大的信号。 此外,通过使用角隅棱镜作为参考光反射镜,不再需要对参考光的反射镜角度的调整,并且也可以以简化的结构实现高精度的信号检测。
    • 6. 发明申请
    • OPTICAL HEAD AND OPTICAL DISK APPARATUS
    • 光头和光盘设备
    • US20090316539A1
    • 2009-12-24
    • US12419421
    • 2009-04-07
    • Hideharu MikamiHarukazu MiyamotoTakahiro Kurokawa
    • Hideharu MikamiHarukazu MiyamotoTakahiro Kurokawa
    • G11B7/00
    • G11B7/005G11B7/0956G11B7/1353G11B7/1356G11B7/1359G11B7/1367G11B7/1378G11B2007/0013
    • There are provided an interference type optical head and an optical disk apparatus, which have a signal amplification effect and which can be manufactured in sizes comparable to conventional optical heads. In an optical disk apparatus that performs signal amplification by making a light, which is used as a reference light without being irradiated on an optical disk and, interfere with reflected light from the optical disk, a corner cube prism that reflects the reference light is mounted on the same actuator as an objective lens. Further, there is provided a movable portion that adjusts the optical path length of the interfering light in accordance with the kind of optical disk being read and the recording layer being read. A wedge prism may be used for the movable portion, and a spherical aberration correction lens and an optical path length adjusting component may be moved integrally. Thus, a stable amplification effect may be obtained while keeping the overall size comparable to conventional apparatuses.
    • 提供了具有信号放大效果的干涉型光学头和光盘装置,其可以制造成与传统光学头相当的尺寸。 在通过制造光而进行信号放大的光盘装置中,其被用作基准光而不被照射在光盘上并且干涉来自光盘的反射光,安装反射参考光的角立方棱镜 在与物镜相同的致动器上。 此外,提供了可移动部分,其根据正在读取的光盘的种类和正在读取的记录层来调节干涉光的光路长度。 楔形棱镜可以用于可动部分,并且球面像差校正透镜和光程长度调节部件可以一体地移动。 因此,可以获得稳定的放大效果,同时保持与常规设备相当的总体尺寸。
    • 7. 发明申请
    • OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS AND OPTICAL INFORMATION REPRODUCING APPARATUS
    • 光信息记录/再现设备和光信息重现设备
    • US20110141867A1
    • 2011-06-16
    • US12961571
    • 2010-12-07
    • Hideharu MIKAMIHarukazu Miyamoto
    • Hideharu MIKAMIHarukazu Miyamoto
    • G11B20/00
    • G11B7/083G03H2001/0441G03H2210/562G11B7/00781G11B2007/00656
    • In a system of detecting an interference light with a light not irradiated onto an optical disc to increase the S/N ratio, it is difficult to stably acquire a reproduced signal with a simple configuration. Since the recording density is not improved, an improvement in transfer rate is difficult. In an optical information recording/reproducing apparatus where two optical beams face each other and are focused at the same place of a recording medium to record a standing wave developed by interference of the two optical beams, a phase difference of the two optical beams is modulated in a multiple stage and recorded. During reproduction, an interference light of a reproduced light from the recording medium and another reproduction reference light is detected as a reproduced signal, and a phase servo control stabilizing the phase of interference during reproduction by using a low frequency component of the reproduced signal is conducted.
    • 在利用未照射到光盘上的光来检测干涉光以提高S / N比的系统中,难以以简单的结构稳定地获取再生信号。 由于记录密度没有改善,传输速率的提高是困难的。 在其中两个光束彼此面对并聚焦在记录介质的相同位置以记录由两个光束的干涉产生的驻波的光信息记录/再现装置中,两个光束的相位差被调制 在多个阶段并记录下来。 在再现期间,检测来自记录介质的再现光的干涉光和另一个再现参考光作为再现信号,并且通过使用再现信号的低频分量来进行稳定再现期间的干扰相位的相位伺服控制 。
    • 8. 发明授权
    • Optical recording and reproducing apparatus
    • 光学记录和再现设备
    • US08400898B2
    • 2013-03-19
    • US12893069
    • 2010-09-29
    • Hideharu MikamiKoichi WatanabeHarukazu Miyamoto
    • Hideharu MikamiKoichi WatanabeHarukazu Miyamoto
    • G11B7/00
    • G11B7/0065G11B7/00781G11B7/128G11B7/24088
    • The present invention achieves an optical recording and reproducing apparatus focusing two opposed beams of light at a same place in an optical recording medium to record a standing wave generated by interference of the two beams of light. In the apparatus, phase information is recorded in the optical recording medium by a phase modulating means for modulating phase of one of the two beams of light. The reproduction reference light generated from a light source is allowed to interfere with reproduced light generated by projecting one of the two beams of light onto the optical recording medium to generate three or more beams of interfering light having different interference phases are simultaneously generated. The three or more beams of interfering light are then detected, and the phase modulated by the phase modulating means is demodulated from an output of the detector.
    • 本发明实现了在光记录介质中的相同位置聚焦两个相对的光束以记录由两束光的干涉产生的驻波的光学记录和再现装置。 在该装置中,通过用于调制两束光之一的相位的相位调制装置将相位信息记录在光学记录介质中。 从光源产生的再现参考光被允许同时产生通过将两个光束中的一个投影到光记录介质上而产生三个或更多个具有不同干涉相位的干涉光束的再生光。 然后检测三个或更多个干涉光束,并且由相位调制装置调制的相位从检测器的输出解调。
    • 9. 发明申请
    • OPTICAL HEAD AND OPTICAL DISK DEVICE
    • 光头和光盘设备
    • US20080205246A1
    • 2008-08-28
    • US12025797
    • 2008-02-05
    • Takeshi ShimanoHarukazu MiyamotoHideharu MikamiJiro Hashizume
    • Takeshi ShimanoHarukazu MiyamotoHideharu MikamiJiro Hashizume
    • G11B7/135
    • G11B7/1378G11B7/0903G11B7/1353G11B7/1356G11B7/1359
    • An interference type optical head and an optical disk device that can easily adjust an optical path length difference of a couple of lights, ensure higher signal amplification effect, and are suitable for reduction in size are provided in order to improve a regeneration signal quality with amplification of signal in the case where reflectivity of each layer must be lowered and relative noise for the signal increases because read speed is high in a multilayer optical disk. In view of essentially improving an S/N ratio of the regeneration signal in high-speed rotation of a multilayer disk, a plurality of interference phases are generated and an optical system for differential calculation has been reduced in size with an angular selective polarization conversion element in the optical disk device for amplifying the signal with interference of the light not radiated to the disk with the reflected light from the disk. Moreover, adjustment of reflection mirror angle of the reference light is no longer required by using a corner cube prism as the reference light reflection mirror and highly accurate signal detection can also be realized with a simplified structure.
    • 可以容易地调整两个光的光程长度差的干涉型光头和光盘装置,确保更高的信号放大效果,并且适合于减小尺寸,以便通过放大来提高再生信号质量 在多层光盘中的读取速度高的情况下,必须降低每一层的反射率和信号的相对噪声的信号。 鉴于在多层盘的高速旋转中基本上提高再生信号的S / N比,产生多个干涉相位,并且用角度选择偏振转换元件的差分计算用光学系统的尺寸减小了 在光盘装置中,用于将没有辐射到盘的光的信号与来自盘的反射光放大的信号。 此外,通过使用角隅棱镜作为参考光反射镜,不再需要对参考光的反射镜角度的调整,并且也可以以简化的结构实现高精度的信号检测。
    • 10. 发明授权
    • Write power adjustment method and information recording method
    • 写功率调节方法和信息记录方法
    • US08472293B2
    • 2013-06-25
    • US13515654
    • 2010-03-02
    • Soichiro EtoKoichi WatanabeHarukazu Miyamoto
    • Soichiro EtoKoichi WatanabeHarukazu Miyamoto
    • G11B7/00
    • G11B7/0045G11B7/1267G11B7/24038G11B2007/0013
    • In write power adjustment for an optical disc having a plurality of information storage layers, data of trial writing is varied by the influence of layers other than a target layer. It is difficult, therefore, to determine optimal write power. A modulation M[m] is obtained from a reproduction signal amplitude of a signal subjected to the trial writing performed with use of write powers Pw[m] (m being an integer) of a plurality of kinds. At least an optimum write power intercept Pint_opt is determined by fitting a relation between the Pw[m] and the M[m] by a modulation characteristic formula M=Masy×(1−(Pint−Pasy)/(Pw−Pasy)) having an asymptotic modulation Masy, a write power intercept Pint, and an asymptotic write power Pasy as parameters. Approximation accuracy by the fitting and/or quality of the trial writing signal are evaluated with use of at least the M[m], the modulation characteristic formula, and the Pint_opt. An optimum write power Pw_opt is calculated by performing a specified operation at least with use of the Pint_opt.
    • 在具有多个信息存储层的光盘的写入功率调整中,试写的数据由目标层以外的层的影响而变化。 因此,很难确定最佳写入功率。 通过使用多种写入功率Pw [m](m为整数)进行试写的信号的再现信号振幅,获得调制M [m]。 通过用调制特性公式M = Masy×(1-(Pint-Pasy)/(Pw-Pasy))拟合Pw [m]和M [m]之间的关系来确定至少最佳写功率截止Pint_opt 具有渐近调制Masy,写功率截取Pint,渐近写功率Pasy作为参数。 通过使用至少M [m],调制特性公式和Pint_opt来评估试写信号的拟合和/或质量的近似精度。 至少通过使用Pint_opt执行指定的操作来计算最佳写入功率Pw_opt。