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31. 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。

32. 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）。

33. 发明申请

US20070230295A1 ABERRATION CORRECTING ELEMENT IN THE OPTICAL HEAD OF A RECORDING AND REPRODUCTION SYSTEM 失效
标题翻译：在记录和再现系统的光学头中校正元素
公开(公告)号：US20070230295A1
公开(公告)日：2007-10-04
申请号：US11760326
申请日：2007-06-08
申请人： Noriaki NISHI
发明人： Noriaki NISHI
IPC分类号： G11B7/00
CPC分类号： G11B7/13925 , G02B27/0068 , G02B27/58 , G02F1/134309 , G02F2203/18 , G11B7/1369 , G11B7/13927 , G11B2007/0013
摘要： Even in the case where there is used technique such as “high NA”, “multi-layer recording”, etc., in order to carry out optimum correction of wave front aberration produced thereby with a simple technique, such an aberration correcting element to vary variable A and variable B (A≠B) of phase distribution formula A(−r4)−B(−r2) as phase correction pattern by aberration correcting element is realized by using a liquid crystal element (30). The liquid crystal element (30) forms such an electrode pattern to generate phase distribution corresponding to spherical aberration at one transparent electrode (31A), and forms such an electrode pattern to generate defocus pattern at the other transparent electrode (31B). In addition, by controlling applied voltages with respect to these electrodes, it becomes possible to independently carry out variable control of the above-described variables A and B.
摘要翻译：即使在使用诸如“高NA”，“多层记录”等技术的情况下，为了通过简单的技术进行由此产生的波前像差的最佳校正，这样的像差校正元件通过像差校正将相位分布公式A（-rH4）-B（-r2）的变量A和变量B（A

34. 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.

35. 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.

36. 发明申请

US20060140104A1 Optical pickup and optical disk apparatus 审中-公开
标题翻译：光学拾取和光盘设备
公开(公告)号：US20060140104A1
公开(公告)日：2006-06-29
申请号：US11288076
申请日：2005-11-29
申请人： Kenji Yamamoto , Noriaki Nishi
发明人： Kenji Yamamoto , Noriaki Nishi
IPC分类号： G11B7/00 , G11B7/135
CPC分类号： G11B7/127 , G11B7/13922 , G11B2007/0006
摘要： An optical pickup adapted to operate for optical disks of a plurality of different types and an optical disk apparatus include a light source for emitting a first light beam with a wavelength matching a first optical disk or a second light beam with a wavelength matching a second optical disk, an objective lens for converging the first light beam or the second light beam emitted from the light source onto the recording surface of the first optical disk or the second optical disk, whichever appropriate, and a first aberration correcting means arranged on the light path of the first light beam between the light source and the objective lens to generate an aberration for canceling the coma arising due to the objective lens.
摘要翻译：适于操作多种不同类型的光盘的光学拾取器和光盘装置包括用于发射具有与第一光盘匹配的波长的第一光束的光源或具有与第二光学器件相匹配的波长的第二光束盘，用于将从光源发射的第一光束或第二光束会聚到第一光盘或第二光盘的记录表面上的任何一个适合的物镜;以及布置在光路上的第一像差校正装置的第一光束在光源和物镜之间产生用于消除由于物镜引起的彗差的像差。

37. 发明申请

US20060023609A1 Optical pickup apparatus, optical recording and reproducing apparatus and optical recording and reproducing method 审中-公开
标题翻译：光学拾取装置，光学记录和再现装置以及光学记录和再现方法
公开(公告)号：US20060023609A1
公开(公告)日：2006-02-02
申请号：US11182883
申请日：2005-07-18
申请人： Kenji Yamamoto , Katsutoshi Sato , Noriaki Nishi , Midori Kanaya , Shinya Makita
发明人： Kenji Yamamoto , Katsutoshi Sato , Noriaki Nishi , Midori Kanaya , Shinya Makita
IPC分类号： G11B7/135 , G11B7/00
CPC分类号： G11B7/1398
摘要： An optical pickup apparatus includes a semiconductor laser for emitting laser light with a wavelength of at least from 400 nm to 415 nm and of which plane parallel to an active layer is located substantially in parallel to the recording surface of an optical recording medium and a reflection surface for reflecting laser light emitted from the semiconductor laser in the direction substantially perpendicular to the recording surface of the optical recording medium, the laser light being irradiated on the optical recording medium through an objective lens to record and/or reproduce the optical recording medium, wherein an angle θ formed between the direction of rays of light introduced into the reflection surface from the semiconductor laser and the direction in which recording tracks of the optical recording medium are extended is selected so as to satisfy: 45°≦θ
摘要翻译：一种光学拾取装置包括用于发射波长为至少400nm至415nm的激光的半导体激光器，并且其平行于有源层的平面与光记录介质的记录表面基本平行的反射表面，用于反射从半导体激光器沿与光学记录介质的记录表面大致垂直的方向发射的激光，激光通过物镜照射在光学记录介质上以记录和/或再现光学记录介质，其中选择在从半导体激光器引入到反射表面中的光线的方向与光学记录介质的记录轨道延伸的方向之间形成的角度θ，以便满足：<？在线公式描述 =“在线公式”end =“lead”？> 45°<=θ<90°<？in-line-formula description =“In-line Formulas” 然后，在可以适用于包括具有BD（蓝光光盘）类型布置的光记录介质的光记录介质的光拾取装置和光记录和再现装置中，可能是可能的通过用记录轨道上具有最佳轮廓的束斑照射光来保持令人满意的记录和再现特性。

38. 发明申请

US20050276297A1 Optical pickup and optical disk apparatus 审中-公开
标题翻译：光学拾取和光盘设备
公开(公告)号：US20050276297A1
公开(公告)日：2005-12-15
申请号：US11116303
申请日：2005-04-28
申请人： Noriaki Nishi , Yoshiki Okamoto , Katsuhiro Seo , Satoshi Imai , Kenji Yamamoto , Takeshi Yonezawa , Midori Kanaya , Hiroaki Nakagawa
发明人： Noriaki Nishi , Yoshiki Okamoto , Katsuhiro Seo , Satoshi Imai , Kenji Yamamoto , Takeshi Yonezawa , Midori Kanaya , Hiroaki Nakagawa
IPC分类号： G11B7/135 , G11B7/00 , G11B7/125 , H01S5/00
CPC分类号： G11B7/1369 , G11B7/1378 , G11B7/13925 , G11B2007/0006 , G11B2007/13727 , H01S5/005
摘要： An optical pickup includes a laser light source configured to emit laser light, an objective lens configured to focus the laser light emitted from the laser light onto an optical disk, and an image-formation magnification rate varying section for varying an image-formation magnification rate at which the laser light is focused on the optical disk.
摘要翻译：光学拾取器包括被配置为发射激光的激光光源，被配置为将从激光发射的激光聚焦到光盘上的物镜，以及用于改变成像放大率的成像倍率变化部分其中激光聚焦在光盘上。

39. 发明授权

US06781931B2 Optical information recording/reproducing apparatus and optical pickup apparatus 失效
标题翻译：光信息记录/再现装置和光拾取装置
公开(公告)号：US06781931B2
公开(公告)日：2004-08-24
申请号：US09459600
申请日：1999-12-13
申请人： Noriaki Nishi
发明人： Noriaki Nishi
IPC分类号： G11B700
CPC分类号： G11B7/131 , G11B7/00 , G11B7/0909 , G11B7/123 , G11B7/1356 , G11B7/1359
摘要： The invention relates to an optical information recording/reproduction apparatus and an optical pickup apparatus in which the configuration of a light receiving element is optimized particularly in a focus error signal and/or tracking error signal. Thereby, the offset due to the stray light generated from the light emitted from a light emitting element which is incident directly onto the light receiving element without incidence onto a recording medium is equalized approximately to 0.
摘要翻译：本发明涉及一种光信息记录/再现装置和光拾取装置，其特征在于在聚焦误差信号和/或跟踪误差信号中优化光接收元件的结构。因此，由从直接入射到光接收元件上的发光元件发射的光产生的杂散光而不入射到记录介质上的偏移量大约相等于0。

40. 发明授权

US06778474B2 Optical pickup device, optical disc apparatus and method of detecting track discrimination signal 失效
标题翻译：光拾取装置，光盘装置以及检测轨道识别信号的方法
公开(公告)号：US06778474B2
公开(公告)日：2004-08-17
申请号：US09750377
申请日：2000-12-27
申请人： Noriaki Nishi
发明人： Noriaki Nishi
IPC分类号： G11B700
CPC分类号： G11B7/127 , G11B7/00718 , G11B7/08505 , G11B7/0903 , G11B7/131 , G11B7/1353
摘要： A track discrimination signal can be generated without requiring the use of a large number of parts or a complex device configuration even when an optical recording medium adapted to the “land/groove recording system” such as a “DVD-RAM” is used. A main light spot is and auxiliary light spots are formed on an optical disc for signal recording and signal reproduction. The auxiliary light spots have respective distances different from that of the main light spot relative to an objective lens and formed at a position expressed by SPn/2, where S is the absolute value of the distance relative to the main spot in the normal direction of the recording tracks formed on the signal recording surface relative to the man spot, P is the track pitch and n is an integer.
摘要翻译：即使当使用适合于诸如“DVD-RAM”的“平台/凹槽记录系统”的光记录介质时，也可以产生轨迹鉴别信号，而不需要使用大量的部件或复杂的装置配置。主光点是在光盘上形成的辅助光点，用于信号记录和信号再现。辅助光点具有与主光点相对于物镜的距离不同的距离，并且形成在由下述位置表示的位置处：S是相对于形成在上述记录道上的记录轨道的法线方向的主要点的距离的绝对值信号记录表面，P是轨道间距，n是整数。

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