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1. 发明授权

US07619959B2 Optical head, optical recording medium recording and/or reproducing apparatus and recording and/or reproducing method using the optical head 失效
标题翻译：光头，光记录介质记录和/或再现装置以及使用光头的记录和/或再现方法
公开(公告)号：US07619959B2
公开(公告)日：2009-11-17
申请号：US10498008
申请日：2002-12-18
申请人： Noriaki Nishi , Masaru Tezuka , Naoki Inoue , Kunika Hashimoto
发明人： Noriaki Nishi , Masaru Tezuka , Naoki Inoue , Kunika Hashimoto
IPC分类号： G11B7/00
CPC分类号： G11B7/1263 , G11B7/00 , G11B7/1356 , G11B7/1369 , G11B2007/0006 , G11B2007/0013
摘要： An optical disk drive (101) for optically recording and/or reproducing information signals is provided in which the power of a light beam emitted from an optical head (104) to an optical disk (102) is controlled by an optical-coupling efficiency varying elements (214, 215) correspondingly to the type of the optical disk, recording layer in a multilayer optical disk and a mode of operation selected while a variation of the optical-coupling efficiency is being detected by a light-detecting element (216), thereby positively varying the optical-coupling efficiency in a minimum necessary time. Thus, the power of the light beam focused on the optical disk can be varied in a wide range without having to extremely raise the ratio in output power between modes of operation at a light source (212). Therefore, even a light source whose rating of optical output power is small can be used to write and read information signals to and from any of optical disks of different types or to each of recording layers in a multilayer optical disk with a high accuracy. Namely, good characteristics in writing and reading information signals can be assured without having to largely vary the ratio in output power of the light source from the write to read mode, from one to another type of optical disks or from one to another recording layer of the multilayer optical disk.
摘要翻译：提供用于光学记录和/或再现信息信号的光盘驱动器（101），其中从光学头（104）发射到光盘（102）的光束的功率由光耦合效率变化对应于光盘类型的元件（214,215），多层光盘中的记录层以及由光检测元件（216）检测光耦合效率的变化而选择的操作模式，从而在最小必要时间内积极地改变光耦合效率。因此，聚焦在光盘上的光束的功率可以在宽范围内变化，而不必极大地提高在光源（212）处的操作模式之间的输出功率的比率。因此，即使是光输出功率等级较小的光源也可以用于从多个光盘中的不同类型的光盘或每个记录层以高精度写入信息信号和从多层光盘中的每个记录层读取信息信号。即，可以确保写入和读取信息信号的良好特性，而不必大幅度地改变光源的输出功率与写入/读取模式之间的比例，从一个到另一个类型的光盘，或从一个到另一个记录层多层光盘。

2. 发明申请

US20050117494A1 Optical head, optical recording medium recording and/or reproducing apparatus and recording and/or reproducing method using the optical head 失效
标题翻译：光头，光记录介质记录和/或再现装置以及使用光头的记录和/或再现方法
公开(公告)号：US20050117494A1
公开(公告)日：2005-06-02
申请号：US10498008
申请日：2002-12-18
申请人： Noriaki Nishi , Masaru Tezuka , Naoki Inoue , Kunika Hashimoto
发明人： Noriaki Nishi , Masaru Tezuka , Naoki Inoue , Kunika Hashimoto
IPC分类号： G02F1/13 , G11B7/00 , G11B7/004 , G11B7/1263
CPC分类号： G11B7/1263 , G11B7/00 , G11B7/1356 , G11B7/1369 , G11B2007/0006 , G11B2007/0013
摘要： An optical disk drive (101) for optically recording and/or reproducing information signals is provided in which the power of a light beam emitted from an optical head (104) to an optical disk (102) is controlled by an optical-coupling efficiency varying elements (214, 215) correspondingly to the type of the optical disk, recording layer in a multilayer optical disk and a mode of operation selected while a variation of the optical-coupling efficiency is being detected by a light-detecting element (216), thereby positively varying the optical-coupling efficiency in a minimum necessary time. Thus, the power of the light beam focused on the optical disk can be varied in a wide range without having to extremely raise the ratio in output power between modes of operation at a light source (212). Therefore, even a light source whose rating of optical output power is small can be used to write and read information signals to and from any of optical disks of different types or to each of recording layers in a multilayer optical disk with a high accuracy. Namely, good characteristics in writing and reading information signals can be assured without having to largely vary the ratio in output power of the light source from the write to read mode, from one to another type of optical disks or from one to another recording layer of the multilayer optical disk.
摘要翻译：提供用于光学记录和/或再现信息信号的光盘驱动器（101），其中从光学头（104）发射到光盘（102）的光束的功率由光耦合效率变化对应于光盘类型的元件（214,215），多层光盘中的记录层以及由光检测元件（216）检测光耦合效率的变化而选择的操作模式，从而在最小必要时间内积极地改变光耦合效率。因此，聚焦在光盘上的光束的功率可以在宽范围内变化，而不必极大地提高在光源（212）处的操作模式之间的输出功率的比率。因此，即使是光输出功率等级较小的光源也可以用于从多个光盘中的不同类型的光盘或每个记录层以高精度写入信息信号和从多层光盘中的每个记录层读取信息信号。即，可以确保写入和读取信息信号的良好特性，而不必大幅度地改变光源的输出功率与写入/读取模式之间的比例，从一种光盘到另一种类型的光盘，或从一种到另一种类型的光盘多层光盘。

3. 发明授权

US07177259B2 Optical head and optical recording medium drive device 有权
标题翻译：光头和光记录介质驱动装置
公开(公告)号：US07177259B2
公开(公告)日：2007-02-13
申请号：US10493671
申请日：2003-08-19
申请人： Noriaki Nishi , Masaru Tezuka , Kunika Hashimoto
发明人： Noriaki Nishi , Masaru Tezuka , Kunika Hashimoto
IPC分类号： G11B7/00
CPC分类号： G11B7/128 , G11B7/1263 , G11B7/1356 , G11B7/1369 , G11B2007/0006 , G11B2007/0013
摘要： The present invention is directed to an optical head adapted for performing recording or reproduction of information signals with respect to an optical disc (102), which controls light coupling efficiency with respect to light beams irradiated onto the optical disc (102) by light coupling efficiency adjustable element such as a liquid crystal element (214), etc. in accordance with type of the optical disc (102), recording surface of multi-layer optical disc and/or operation mode to change power of light beams irradiated onto the optical disc (102) to a large extent without excessively increasing change quantity of output power of a semiconductor laser element (212). A beam splitter (218) divides incident light beams of P-polarized light at a predetermined ratio to allow the light beams thus obtained to be incident on a light detector (219) for disc surface power monitor.
摘要翻译：本发明涉及一种适用于相对于光盘（102）执行信息信号的记录或再现的光学头，其通过光耦合效率来控制相对于照射到光盘（102）上的光束的光耦合效率根据光盘（102）的类型，诸如液晶元件（214）等的可调元件，多层光盘的记录面和/或操作模式，以改变照射到光盘上的光束的功率（102），而不会过度增加半导体激光元件（212）的输出功率的变化量。分束器（218）以预定比例将P偏振光的入射光束分隔开，以使所获得的光束入射到用于盘表面功率监视器的光检测器（219）上。

4. 发明授权

US07280449B2 Optical head and recording and/or reproducing apparatus 有权
标题翻译：光头和记录和/或再现装置
公开(公告)号：US07280449B2
公开(公告)日：2007-10-09
申请号：US10794336
申请日：2004-03-04
申请人： Noriaki Nishi , Masaru Tezuka
发明人： Noriaki Nishi , Masaru Tezuka
IPC分类号： G11B7/13
CPC分类号： G11B7/1263 , G11B7/0053 , G11B7/0943 , G11B7/131 , G11B7/1356 , G11B7/1369 , G11B7/13925 , G11B7/24079 , G11B7/24082
摘要： An optical head in which pre-formatted signals may be detected as variations in the amplitude or the phase in the pre-formatted signals are suppressed, and a recording and/or reproducing apparatus employing the optical head, are disclosed. The optical head includes a light source 212, an objective lens 220 for condensing a light beam radiated from the light source 212 on a recording track of an optical recording medium 102, and a photodetector unit 223 for receiving the light beam reflected back from said recording track. The photodetector unit 223 includes a first light receiving section 230b and a second light receiving section 230c. With a track pitch Tp of the optical recording medium, the wavelength λ of the light beam radiated from the light source 212, the numerical aperture NA of the objective lens and with λ/(Tp·NA)≧4/3, the first light receiving section receives the light of one of two light spot areas lying on both sides of a center area of a light spot of the reflected light beam passing through the center of the light spot for extending along the length of the recording track. The second light receiving section receives the light of the other of the two light spot areas.
摘要翻译：预先格式化的信号可被检测为预格式化信号中的幅度或相位的变化的光学头，并且公开了采用光学头的记录和/或再现装置。光头包括光源212，用于将从光源212辐射的光束聚光在光记录介质102的记录轨道上的物镜220和用于接收从所述记录反射回的光束的光电检测器单元223 跟踪。光检测器单元223包括第一光接收部分230b和第二光接收部分230c。利用光学记录介质的轨道间距Tp，从光源212辐射的光束的波长λ，物镜的数值孔径NA和λ/（Tp.NA）> = 4/3，第一光接收部接收位于通过光点中心的反射光束的光点的中心区域的两侧的两个光点区域之一的光，以沿着记录轨道的长度延伸。第二光接收部接收两个光点区域中的另一个的光。

5. 发明授权

US08953424B2 Optical recording medium driving apparatus, and method of generating tracking error signal 有权
标题翻译：光记录介质驱动装置，以及产生跟踪误差信号的方法
公开(公告)号：US08953424B2
公开(公告)日：2015-02-10
申请号：US13485144
申请日：2012-05-31
申请人： Kimihiro Saito , Noriaki Nishi
发明人： Kimihiro Saito , Noriaki Nishi
IPC分类号： G11B7/00 , G11B7/09
CPC分类号： G11B7/0903
摘要： An optical-recording-medium driving apparatus includes: a light irradiating/receiving section configured to irradiate light on a medium so as to form a first side spot, a main spot, and a second side spot, and to receive reflection light from the individual spots; a first delay section configured to delay a light reception signal on the first side spot in accordance with a disposition interval between the first and the second side spots; a second delay section configured to delay a light reception signal on the main spot in accordance with a disposition interval between the main and second side spots; and a tracking-error-signal generation section configured to generate a tracking error signal on the basis of a correlation between delayed light reception signals on the first side spot and the main spot, and a correlation between the light reception signals on the second side spot and the main spot.
摘要翻译：光记录介质驱动装置包括：光照射/接收部分，被配置为将光照射在介质上以形成第一侧光点，主光点和第二侧光斑，并且接收来自该个体的反射光斑点第一延迟部，被配置为根据第一和第二侧光斑之间的配置间隔延迟第一侧光点处的光接收信号; 第二延迟部，被配置为根据所述主侧和第二侧光斑之间的配置间隔延迟所述主光点上的光接收信号; 以及跟踪误差信号生成部，被配置为基于第一侧点的延迟光接收信号和主光点之间的相关性以及第二侧光点上的光接收信号之间的相关性来生成跟踪误差信号和主要地点。

6. 发明申请

US20120320721A1 OPTICAL RECORDING MEDIUM DRIVING APPARATUS, AND METHOD OF GENERATING TRACKING ERROR SIGNAL 有权
标题翻译：光记录介质驱动装置及产生跟踪误差信号的方法
公开(公告)号：US20120320721A1
公开(公告)日：2012-12-20
申请号：US13485144
申请日：2012-05-31
申请人： Kimihiro Saito , Noriaki Nishi
发明人： Kimihiro Saito , Noriaki Nishi
IPC分类号： G11B7/00
CPC分类号： G11B7/0903
摘要： An optical-recording-medium driving apparatus includes: a light irradiating/receiving section configured to irradiate light on a medium so as to form a first side spot, a main spot, and a second side spot, and to receive reflection light from the individual spots; a first delay section configured to delay a light reception signal on the first side spot in accordance with a disposition interval between the first and the second side spots; a second delay section configured to delay a light reception signal on the main spot in accordance with a disposition interval between the main and second side spots; and a tracking-error-signal generation section configured to generate a tracking error signal on the basis of a correlation between delayed light reception signals on the first side spot and the main spot, and a correlation between the light reception signals on the second side spot and the main spot.
摘要翻译：光记录介质驱动装置包括：光照射/接收部分，被配置为将光照射在介质上以形成第一侧光点，主光点和第二侧光斑，并且接收来自该个体的反射光斑点第一延迟部，被配置为根据第一和第二侧光斑之间的配置间隔延迟第一侧光点处的光接收信号; 第二延迟部，被配置为根据所述主侧和第二侧光斑之间的配置间隔延迟所述主光点上的光接收信号; 以及跟踪误差信号生成部，被配置为基于第一侧点的延迟光接收信号和主光点之间的相关性以及第二侧光点上的光接收信号之间的相关性来生成跟踪误差信号和主要地点。

7. 发明申请

US20100214902A1 OPTICAL PICKUP AND OPTICAL DISC DEVICE 有权
标题翻译：光学拾取和光盘设备
公开(公告)号：US20100214902A1
公开(公告)日：2010-08-26
申请号：US12703294
申请日：2010-02-10
申请人： Fumiaki Nakano , Nobuhiko Ando , Noriaki Nishi , Takashi Nakao , Hiroaki Nakagawa , Yutaka Tentaku
发明人： Fumiaki Nakano , Nobuhiko Ando , Noriaki Nishi , Takashi Nakao , Hiroaki Nakagawa , Yutaka Tentaku
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/0903 , G11B7/131 , G11B2007/0013
摘要： An optical pickup includes: a light source outputting a light beam; an objective lens collecting the light beam on a target recording layer as a target of plural recording layers provided in an optical disc; a lens moving unit moving the objective lens in a tracking direction nearly orthogonal to track grooves helically or coaxially formed in the target recording layer; a collective lens collecting a reflected light beam formed when the light beam is reflected by the optical disc; a diffraction optical element diffracting part of the reflected first-order light beam in predetermined directions as first, second, third and fourth beams; and a photodetector receiving the first and second beams using first and second light receiving areas, and generating light reception signals, and receiving the third and fourth beams using third and fourth light receiving areas, and generates light reception signals.
摘要翻译：光拾取器包括：输出光束的光源; 将目标记录层上的光束收集成设置在光盘中的多个记录层的目标物的物镜; 透镜移动单元，沿跟踪方向移动所述物镜，所述跟踪方向与所述目标记录层中螺旋或同轴地形成的轨道槽几乎正交; 收集当光束被光盘反射时形成的反射光束的集体透镜; 衍射光学元件将预定方向的反射一次光束的一部分衍射为第一，第二，第三和第四光束; 以及光电检测器，其使用第一和第二光接收区域接收第一和第二光束，并且产生光接收信号，并且使用第三和第四光接收区域接收第三和第四光束，并且产生光接收信号。

8. 发明授权

US07428201B2 Optical disc device, optical pickup control method and optical disc discriminating method 失效
标题翻译：光盘装置，光学拾取控制方法和光盘识别方法
公开(公告)号：US07428201B2
公开(公告)日：2008-09-23
申请号：US10569370
申请日：2005-07-11
申请人： Takashi Nakao , Noriaki Nishi
发明人： Takashi Nakao , Noriaki Nishi
IPC分类号： G11B7/00
CPC分类号： G11B7/13925 , G11B7/0903 , G11B7/0908 , G11B7/0945 , G11B7/126 , G11B7/131 , G11B19/127 , G11B2007/0006 , G11B2007/0013
摘要： In the present invention, an optical pick-up (4) applies an optical beam to an optical disc (2) on which one or more information recording layers (20A) and (20B) are laminated in the direction of thickness through an objective lens (34) and detects a reflected light from one of the information recording layers laminated on the optical disc. A first photodetecting part (81) for detecting the reflected light from the one information recording layer and a second photodetecting part (82) composed of one or more light receiving surfaces for detecting a stray light from other information recording layers are mounted on a light receiving element (52). The number of the information recording layers laminated on the optical disc (2) is discriminated on the basis of the intensity of the stray light detected by the second photodetecting part (82). The optical pick-up (4) is controlled in accordance with the discriminated number of the information recording layers before a focus is controlled.
摘要翻译：在本发明中，光学拾取器（4）将光束施加到光盘（2）上，其中一个或多个信息记录层（20A）和（20B）在厚度方向上通过一个物镜（34），并检测层叠在光盘上的信息记录层之一的反射光。用于检测来自一个信息记录层的反射光的第一光电检测部分（81）和由用于检测来自其它信息记录层的杂散光的一个或多个光接收表面组成的第二光电检测部分（82）安装在光接收元件（52）。基于由第二受光部（82）检测到的杂散光的强度来判别层叠在光盘（2）上的信息记录层的数量。在控制焦点之前，根据所识别的信息记录层的数量来控制光学拾取器（4）。

9. 发明授权

US07173898B2 Optical recording medium driving device 有权
公开(公告)号：US07173898B2
公开(公告)日：2007-02-06
申请号：US10307979
申请日：2002-12-03
申请人： Noriaki Nishi , Kenji Yamamoto
发明人： Noriaki Nishi , Kenji Yamamoto
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/0079 , G11B7/1263 , G11B7/1356 , G11B7/1365 , G11B7/1369 , G11B7/1395 , G11B19/12 , G11B2007/0006 , G11B2007/0013 , G11B2007/13727
摘要： A method and an apparatus for driving an optical recording medium for recording and/or reproducing various information for the optical recording medium, in which the output power ratio of the light source may be reduced for recording and reproduction, for optical recording media of different sorts, or for respective recording surfaces of a multi-layered optical recording medium, so that optimum characteristics may be realized even with use of an easy-to-fabricate light source or a light source with a smaller light output rating. The intensity of a light beam emitted on an optical recording medium 102 by an optical head 104 is controlled by optical coupling efficiency varying elements 214, 215 depending on the sort of the optical recording medium 102, recording surfaces of a multi-layered optical recording medium, recording surfaces in the multi-layered optical recording medium or on the operating modes, in such a manner that the intensity of the light beam emitted on the optical recording medium 102 may be significantly varied without drastically increasing the output power ratio on the side light source 212.

10. 发明申请

US20060164955A1 Recording and playback apparatus and optical head 失效
公开(公告)号：US20060164955A1
公开(公告)日：2006-07-27
申请号：US11387832
申请日：2006-03-24
申请人： Noriaki Nishi , Hiroaki Mizuma , Motoi Kimura , Kenji Yamamoto , Masatoshi Nishino
发明人： Noriaki Nishi , Hiroaki Mizuma , Motoi Kimura , Kenji Yamamoto , Masatoshi Nishino
IPC分类号： G11B7/00
CPC分类号： G11B7/1263 , G11B7/128 , G11B7/1356 , G11B7/1369 , G11B7/1381
摘要： The light intensity of a light beam emitted from a light source is appropriately controlled when the light beam is transmitted through a variable optical coupling efficiency device in an optical head. During a read mode, the light beam from the light source is incident on an optical disk at an intensity relatively weaker than that of the light source. By switching the optical coupling efficiency of the variable optical coupling efficiency device between a write mode and a read mode, the light intensity directed to an optical recording medium is substantially varied from the write mode to the read mode. This arrangement eliminates the need for substantially increasing the optical output power ratio of the light source of write power to read power.

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