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1. 发明申请

US20090316539A1 OPTICAL HEAD AND OPTICAL DISK APPARATUS 有权
标题翻译：光头和光盘设备
公开(公告)号：US20090316539A1
公开(公告)日：2009-12-24
申请号：US12419421
申请日：2009-04-07
申请人： Hideharu Mikami , Harukazu Miyamoto , Takahiro Kurokawa
发明人： Hideharu Mikami , Harukazu Miyamoto , Takahiro Kurokawa
IPC分类号： G11B7/00
CPC分类号： G11B7/005 , G11B7/0956 , G11B7/1353 , G11B7/1356 , G11B7/1359 , G11B7/1367 , G11B7/1378 , G11B2007/0013
摘要： 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.
摘要翻译：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。

2. 发明授权

US08576677B2 Optical signal detecting circuit and information reproducing device using the same 失效
标题翻译：光信号检测电路及使用其的信息再现装置
公开(公告)号：US08576677B2
公开(公告)日：2013-11-05
申请号：US12420897
申请日：2009-04-09
申请人： Takahiro Kurokawa , Hideharu Mikami
发明人： Takahiro Kurokawa , Hideharu Mikami
IPC分类号： G11B7/00
CPC分类号： G11B7/13 , G01J1/4228 , G01J1/44 , G11B7/09 , G11B20/10009
摘要： An object of the present invention is to achieve both low noise and fast response in an optical signal detecting circuit capable of providing all of three signals—a focus error signal, a tracking error signal, and an RF signal—with only a single detection system. A single current-to-voltage converter converts a current signal obtained by adding currents flowing through two photodiodes, into a voltage signal. Not only currents flowing into the photodiodes, but also currents flowing out from the photodiodes are taken out as the voltage signals. Moreover, by applying two different reference voltages to the current-to-voltage converters, a reverse bias voltage is applied between the terminals of each photodiode.
摘要翻译：本发明的目的是在能够提供三个信号的光信号检测电路中实现低噪声和快速响应，即仅具有单个检测系统的聚焦误差信号，跟踪误差信号和RF信号。单个电流 - 电压转换器将通过将流过两个光电二极管的电流相加而获得的电流信号转换成电压信号。不仅流入光电二极管的电流，还有从光电二极管流出的电流作为电压信号被取出。此外，通过将两个不同的参考电压施加到电流 - 电压转换器，在每个光电二极管的端子之间施加反向偏置电压。

3. 发明申请

US20090257327A1 Optical Signal Detecting Circuit and Information Reproducing Device Using the Same 失效
标题翻译：光信号检测电路及其使用的信息再现装置
公开(公告)号：US20090257327A1
公开(公告)日：2009-10-15
申请号：US12420897
申请日：2009-04-09
申请人： Takahiro Kurokawa , Hideharu Mikami
发明人： Takahiro Kurokawa , Hideharu Mikami
IPC分类号： G11B7/00 , G11B7/12
CPC分类号： G11B7/13 , G01J1/4228 , G01J1/44 , G11B7/09 , G11B20/10009
摘要： An object of the present invention is to achieve both low noise and fast response in an optical signal detecting circuit capable of providing all of three signals—a focus error signal, a tracking error signal, and an RF signal—with only a single detection system. A single current-to-voltage converter converts a current signal obtained by adding currents flowing through two photodiodes, into a voltage signal. Not only currents flowing into the photodiodes, but also currents flowing out from the photodiodes are taken out as the voltage signals. Moreover, by applying two different reference voltages to the current-to-voltage converters, a reverse bias voltage is applied between the terminals of each photodiode.
摘要翻译：本发明的目的是在能够提供三个信号的光信号检测电路中实现低噪声和快速响应，即仅具有单个检测系统的聚焦误差信号，跟踪误差信号和RF信号。单个电流 - 电压转换器将通过将流过两个光电二极管的电流相加而获得的电流信号转换成电压信号。不仅流入光电二极管的电流，还有从光电二极管流出的电流作为电压信号被取出。此外，通过将两个不同的参考电压施加到电流 - 电压转换器，在每个光电二极管的端子之间施加反向偏置电压。

4. 发明授权

US08098548B2 Optical head and optical disk apparatus 有权
标题翻译：光头和光盘装置
公开(公告)号：US08098548B2
公开(公告)日：2012-01-17
申请号：US12419421
申请日：2009-04-07
申请人： Hideharu Mikami , Harukazu Miyamoto , Takahiro Kurokawa
发明人： Hideharu Mikami , Harukazu Miyamoto , Takahiro Kurokawa
IPC分类号： G11B7/00
CPC分类号： G11B7/005 , G11B7/0956 , G11B7/1353 , G11B7/1356 , G11B7/1359 , G11B7/1367 , G11B7/1378 , G11B2007/0013
摘要： An interference type optical head and an optical disk apparatus which have a signal amplification effect and 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. A movable portion 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.
摘要翻译：具有信号放大效应的干涉型光头和光盘装置，其尺寸可与常规光头相当。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。可移动部分根据正在读取的光盘的种类和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。

5. 发明授权

US5575825A Abrasive 失效
标题翻译：磨料
公开(公告)号：US5575825A
公开(公告)日：1996-11-19
申请号：US305838
申请日：1994-09-14
申请人： Katsuya Iida , Hideharu Mikami , Hiroaki Nishihara
发明人： Katsuya Iida , Hideharu Mikami , Hiroaki Nishihara
IPC分类号： C09C1/68 , C09K3/14
CPC分类号： C09K3/1409
摘要： An abrasive is produced by crushing a cured product of a phenol resin composition into particles, and washing with water and drying the particles. The phenol resin composition may comprise as principal constituents a phenol resin and an organic filler, or a phenol resin, an organic filler and an inorganic filler.
摘要翻译：通过将酚醛树脂组合物的固化物粉碎成颗粒而制成研磨剂，并用水洗涤并干燥颗粒。酚醛树脂组合物可以包括酚醛树脂和有机填料，酚醛树脂，有机填料和无机填料作为主要成分。

6. 发明授权

US08743370B2 Interferometer including elements that reflect beams moved in parallel in a direction substantially perpendicular to a substrate by reflection 有权
标题翻译：干涉仪包括反射沿基本上垂直于衬底的方向平行移动的光束的元件
公开(公告)号：US08743370B2
公开(公告)日：2014-06-03
申请号：US13348954
申请日：2012-01-12
申请人： Kentaro Osawa , Hideharu Mikami
发明人： Kentaro Osawa , Hideharu Mikami
IPC分类号： G01B9/02 , G02F2/00 , H04B10/08 , H04B17/00
CPC分类号： H04B10/556
摘要： A delay interferometer includes a half beam splitter and two pentagonal prisms disposed on a substrate. The half beam splitter branches light to be measured which travels substantially in parallel with the substrate into two branched light beams. The pentagonal prisms respectively reflect the respective branched light beams such that the optical axes of the branched light beams are moved in parallel in a direction substantially perpendicular to the substrate by reflection. The half beam splitter combines the branched light beams reflected by the pentagonal prisms to generate interference light beams.
摘要翻译：延迟干涉仪包括半分光镜和设置在基底上的两个五边形棱镜。半分束器将待测量的光基本上与基板平行地分散成两个分支的光束。五边形棱镜分别反射相应的分支光束，使得分支光束的光轴在基本上垂直于基板的方向上通过反射平行移动。半分光镜组合由五边形棱镜反射的分支光束以产生干涉光束。

7. 发明授权

US08730775B2 Optical information reproducing device, optical information recording device, and method for recording optical information 有权
标题翻译：光信息再现装置，光信息记录装置和用于记录光信息的方法
公开(公告)号：US08730775B2
公开(公告)日：2014-05-20
申请号：US12985410
申请日：2011-01-06
申请人： Hideharu Mikami
发明人： Hideharu Mikami
IPC分类号： G11B7/00 , G11B7/135
CPC分类号： G11B7/0065 , G11B7/00781 , G11B7/1369 , G11B7/24044 , G11B7/2467 , G11B7/25
摘要： Multi-level recording is quite effective for attaining a larger capacity and a higher transfer rate in the case of an optical disk; however, with conventional technologies, a SIGNAL-TO-NOISE RATIO of a signal deteriorates along with an increase in a multi-level degree, creating a factor for limitations to the multi-level degree. In order to solve problems, when optical information is recorded by use of a standing wave occurring due to interference between two light beams, at least one of the two light beams is modulated in multi-stages. Further, at the time of regeneration, a regeneration reference beam is caused to interfere with respective polarization components of a regeneration beam, the polarization components being orthogonal to each other, thereby concurrently generating not less than three interference beams differing in interference phase from each other before being detected.
摘要翻译：多级记录对于在光盘的情况下获得更大的容量和更高的传输速率是非常有效的; 然而，利用传统技术，信号的信号噪声比随着多级度的增加而恶化，从而产生了对多级程度的限制的因素。为了解决问题，当通过使用由于两个光束之间的干涉而发生的驻波来记录光学信息时，两个光束中的至少一个被多级调制。此外，在再生时，使再生参考光束与再生光束的各偏振分量相互干扰，偏振分量彼此正交，从而同时产生不少于干涉相位彼此不同的三个干涉光束在被检测之前。

8. 发明授权

US08699122B2 Interferometer, demodulator, and optical fiber communication module 有权
标题翻译：干涉仪，解调器和光纤通信模块
公开(公告)号：US08699122B2
公开(公告)日：2014-04-15
申请号：US12826763
申请日：2010-06-30
申请人： Hideharu Mikami
发明人： Hideharu Mikami
IPC分类号： G01B9/02 , G02F2/00
CPC分类号： H04L27/223
摘要： In a delay line interferometer inside a demodulator, with respect to polarization states of two split beams of light to be interfered with each other, p polarization and s polarization are reversed by a half beam splitter and, further, again multiplexed by the half beam splitter used for splitting so that interference beams of light are generated.
摘要翻译：在解调器内部的延迟线干涉仪中，相对于待彼此干扰的两束分束光的偏振状态，p偏振和s偏振被半分束器反转，并且还被半分束器用于分裂，从而产生干涉光束。

9. 发明申请

US20110249976A1 POLARIZATION DIVERSITY OPTICAL SYSTEM DEVICE, DEMODULATOR AND TRANSCEIVER 有权
标题翻译：极化多样性光学系统设备，解调器和收发器
公开(公告)号：US20110249976A1
公开(公告)日：2011-10-13
申请号：US13072819
申请日：2011-03-28
申请人： Kentaro Osawa , Hideharu Mikami
发明人： Kentaro Osawa , Hideharu Mikami
IPC分类号： H04B10/02 , G02F2/00 , G02B27/28
CPC分类号： G02B27/283 , H04B10/61 , H04B10/611 , H04B10/614
摘要： A polarization diversity optical system device includes: a polarization split unit that splits a first coherent light into a first split light and a second split light whose polarization components are orthogonal to each other, and splits a second coherent light into a third split light and a fourth split light whose polarization components are orthogonal to each other; and alight combining unit that combines the first split light with one of the third split light and the fourth split light, and combines the second split light with the other of the third split light and the fourth split light.
摘要翻译：偏振分集光学系统装置包括：将第一相干光分解成第一分离光的偏振分割单元和其偏振分量彼此正交的第二分离光，并将第二相干光分离成第三分光，以及其偏振分量彼此正交的第四分裂光; 以及将第一分离光与第三分裂光和第四分离光中的一个组合的合成单元，并且将第二分离光与第三分离光和第四分离光中的另一个组合。

10. 发明授权

US07750276B2 Optical information detecting method, optical head, and optical disc apparatus utilizing plural photodetectors 有权
标题翻译：光信息检测方法，光头，利用多个光检测器的光盘装置
公开(公告)号：US07750276B2
公开(公告)日：2010-07-06
申请号：US11852361
申请日：2007-09-10
申请人： Harukazu Miyamoto , Hideharu Mikami , Takeshi Shimano
发明人： Harukazu Miyamoto , Hideharu Mikami , Takeshi Shimano
IPC分类号： G02B27/40
CPC分类号： G11B7/1356 , G11B7/005 , G11B7/13 , G11B2007/0013
摘要： 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.
摘要翻译：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。

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