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1. 发明申请

US20050122857A1 Optical pickup 审中-公开
标题翻译：光学拾音
公开(公告)号：US20050122857A1
公开(公告)日：2005-06-09
申请号：US10995089
申请日：2004-11-23
申请人： Makoto Sato , Masakazu Ogasawara , Ikuya Kikuchi , Katsuhiro Koike
发明人： Makoto Sato , Masakazu Ogasawara , Ikuya Kikuchi , Katsuhiro Koike
IPC分类号： G11B7/09 , G11B7/00 , G11B7/125 , G11B7/1275 , G11B7/135 , G11B7/1369 , G11B7/1376 , G11B7/1392
CPC分类号： G11B7/13925 , G11B7/1275 , G11B7/1369 , G11B7/1376 , G11B2007/0006
摘要： When recording/reading information data onto/from a recording medium by irradiating the recording medium with a first light beam, correction for decreasing the amount of spherical aberration is made just before the recording or reading. On the other hand, when recording/reading information data onto/from a recording medium by irradiating the recording medium with a second light beam, focus correction for correctly condensing the reflected light from the recording medium on the light receiving surface of a photodetector is made just before the recording or reading.
摘要翻译：当通过用第一光束照射记录介质来记录/读取记录介质上的信息数据时，在记录或读取之前进行用于减小球面像差量的校正。另一方面，当通过用第二光束照射记录介质来将信息数据记录/从记录介质读取信息数据时，进行用于将来自记录介质的反射光正确地聚集在光电检测器的光接收表面上的聚焦校正就在录音或阅读之前。

2. 发明申请

US20080232203A1 Optical Pickup 失效
标题翻译：光学拾音
公开(公告)号：US20080232203A1
公开(公告)日：2008-09-25
申请号：US10593649
申请日：2005-03-17
申请人： Masakazu Ogasawara , Makoto Sato , Ikuya Kikuchi
发明人： Masakazu Ogasawara , Makoto Sato , Ikuya Kikuchi
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/0948 , G11B7/1275 , G11B7/13927 , G11B2007/0006
摘要： An optical pickup projects laser beams having the first to the third wavelengths, in response to the type of a recording medium which is an object to which recording or reproduction is to be performed, and reflecting light from the recording medium is received by a light-detecting element. In order to reduce the sizes of the optical pickup, light of the second and the third wavelengths is generated by a single dual-wavelength light source, and reflecting light of all the wavelengths is to be received by the single light-detecting element. A hologram element giving different optical effects to light of each wavelength is arranged between the light irradiating means and the light-detecting element. Thus, appropriate information recording and reproduction can be performed by using light of each wavelength.
摘要翻译：响应于要进行记录或再现的对象的记录介质的类型，并且来自记录介质的光被反射光接收，光拾取器投射具有第一至第三波长的激光束，检测元件。为了减小光学拾取器的尺寸，通过单个双波长光源产生第二和第三波长的光，并且所有波长的反射光将被单个光检测元件接收。在光照射装置和光检测元件之间布置有对每个波长的光赋予不同光学效果的全息元件。因此，可以通过使用每个波长的光来执行适当的信息记录和再现。

3. 发明授权

US07453787B2 Optical pickup 失效
标题翻译：光学拾音
公开(公告)号：US07453787B2
公开(公告)日：2008-11-18
申请号：US10593649
申请日：2005-03-17
申请人： Masakazu Ogasawara , Makoto Sato , Ikuya Kikuchi
发明人： Masakazu Ogasawara , Makoto Sato , Ikuya Kikuchi
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/0948 , G11B7/1275 , G11B7/13927 , G11B2007/0006
摘要： An optical pickup projects laser beams having the first to the third wavelengths, in response to the type of a recording medium which is an object to which recording or reproduction is to be performed, and reflecting light from the recording medium is received by a light-detecting element. In order to reduce the sizes of the optical pickup, light of the second and the third wavelengths is generated by a single dual-wavelength light source, and reflecting light of all the wavelengths is to be received by the single light-detecting element. A hologram element giving different optical effects to light of each wavelength is arranged between the light irradiating means and the light-detecting element. Thus, appropriate information recording and reproduction can be performed by using light of each wavelength.
摘要翻译：响应于要进行记录或再现的对象的记录介质的类型，并且来自记录介质的光被反射光接收，光拾取器投射具有第一至第三波长的激光束，检测元件。为了减小光学拾取器的尺寸，通过单个双波长光源产生第二和第三波长的光，并且所有波长的反射光将被单个光检测元件接收。在光照射装置和光检测元件之间布置有对每个波长的光赋予不同光学效果的全息元件。因此，可以通过使用每个波长的光来执行适当的信息记录和再现。

4. 发明授权

US06667947B2 Optical multi-layer information recordating medium 失效
公开(公告)号：US06667947B2
公开(公告)日：2003-12-23
申请号：US09988813
申请日：2001-11-20
申请人： Takanori Maeda , Ikuya Kikuchi , Makoto Sato , Katsuhiro Koike , Yoshitsugu Araki
发明人： Takanori Maeda , Ikuya Kikuchi , Makoto Sato , Katsuhiro Koike , Yoshitsugu Araki
IPC分类号： G11B724
CPC分类号： G11B7/1374 , G11B7/00718 , G11B7/1378 , G11B7/139 , G11B7/13925 , G11B7/24 , G11B7/24038 , G11B11/10584 , G11B2007/13727
摘要： The present invention relates to an optical multi-layer information recording medium for recording information therein and/or retrieving information therefrom upon radiation of a convergent beam of light. The recording medium includes at least two pairs of recording layer and light-transmissive layer stacked one after another. A first recording layer proximal to a beam radiation side and a second recording layer distal from the beam radiation side are made from a material that satisfies a function including the following parameters; transmissivity and absorptance of the first recording layer, absorptance of the second recording layer, a numerical aperture on the first recording layer, a numerical aperture of the second recording layer, and transmissivity of between the first and second recording layers. Even if the numerical apertures change with spherical aberration compensation made to respective recording layers, a power density of a light spot does not change. Thus, recordation can be performed with consistent recording characteristics.

5. 发明授权

US06594091B2 Optical pickup 失效
公开(公告)号：US06594091B2
公开(公告)日：2003-07-15
申请号：US09999195
申请日：2001-12-03
申请人： Takanori Maeda , Ikuya Kikuchi , Katsuhiro Koike , Makoto Sato
发明人： Takanori Maeda , Ikuya Kikuchi , Katsuhiro Koike , Makoto Sato
IPC分类号： G02B1318
CPC分类号： G02B27/0025 , G11B7/1378 , G11B7/139 , G11B7/13925
摘要： The present invention relates to an optical pickup having a constant numerical aperture even if spherical aberration is compensated for. The optical pickup is used in an information recording and/or reproducing machine. The information recording and/or reproducing machine records and/or reproduces information in a recording medium upon radiation of a light beam from a light source. The optical pickup includes a condensing optical system for condensing the light beam from the light source onto a recording layer of the recording medium. The condensing optical system includes an object lens. The condensing optical system also includes an aperture positioned about a focal length of the object lens apart from a position of a principal incidence plane of the object lens toward the light source along an optical axis of the condensing optical system.

6. 发明授权

US06529339B2 Lens and production method therefor 失效
公开(公告)号：US06529339B2
公开(公告)日：2003-03-04
申请号：US09940675
申请日：2001-08-29
申请人： Takanori Maeda , Katsuhiro Koike , Ikuya Kikuchi , Makoto Sato
发明人： Takanori Maeda , Katsuhiro Koike , Ikuya Kikuchi , Makoto Sato
IPC分类号： G02B702
CPC分类号： G02B7/021
摘要： A lens made of at least one of a resin and glass includes a lens effective diameter area, a peripheral area formed integral with the lens effective diameter area and located at a periphery of the lens effective diameter area, and at least one marker area located in the peripheral area and formed on a circle whose center is a center of the lens effective diameter area.

7. 发明授权

US07016269B2 Optical pickup apparatus and focusing control method 失效
公开(公告)号：US07016269B2
公开(公告)日：2006-03-21
申请号：US10022843
申请日：2001-12-20
申请人： Masakazu Ogasawara , Ikuya Kikuchi
发明人： Masakazu Ogasawara , Ikuya Kikuchi
IPC分类号： G11B7/00
CPC分类号： G11B7/133 , G11B7/08511 , G11B7/0909 , G11B7/0912 , G11B7/094 , G11B7/0943 , G11B7/0946 , G11B7/131 , G11B2007/0013
摘要： An optical pickup apparatus having an irradiation optical system for condensing a light beam on a track of a recording plane and a photodetection optical system for guiding return light to a photodetector to detect a focal error includes a holographic lens provided in the optical path of the return light for outputting 0-th and ±1st order diffracted lights based on the return light; an optical element provided in front of or behind the holographic lens for providing astigmatism; photodetectors for receiving the 0-th and ±1st order diffracted lights; and servo-signal generating operation circuits connected to the photodetectors for generating a first and second focus error signals having a first and second capture ranges based on the output signal of the photodetector.

8. 发明申请

US20100220576A1 OPTICAL PICKUP DEVICE AND INFORMATION RECORDING/REPRODUCTION DEVICE 审中-公开
标题翻译：光学拾取装置和信息记录/再现装置
公开(公告)号：US20100220576A1
公开(公告)日：2010-09-02
申请号：US11993121
申请日：2006-06-13
申请人： Ikuya Kikuchi , Masakazu Ogasawara , Takuma Yanagisawa
发明人： Ikuya Kikuchi , Masakazu Ogasawara , Takuma Yanagisawa
IPC分类号： G11B7/135
CPC分类号： G11B7/0901 , G11B7/0906 , G11B7/1353 , G11B7/1381
摘要： The present invention makes possible a compact optical pickup device that eliminates effects due to the position where a sub beam is projected during tracking compensation, and provides for stable tracking compensation.A diffraction grating 12 in the optical pickup device PU gives an astigmatism to a sub beam (either of ±1-dimensional light), and shines that sub beam onto an optical disc DK. Also, a tracking error signal Ste is obtained by subtracting a push-pull signal PPsub that corresponds to a sub beam from a push-pull signal PPmain that corresponds to a main beam (0-dimensional light), and tracking compensation is performed based on that tracking error signal Ste.
摘要翻译：本发明使得可以消除由于在跟踪补偿期间投影子光束的位置而产生的影响的紧凑型光学拾取装置，并提供稳定的跟踪补偿。光学拾取装置PU中的衍射光栅12给子光束（±1维光）的散光，并将该子光束照射到光盘DK上。此外，通过从对应于主波束（0维光）的推挽信号PPmain中减去与子波对应的推挽信号PPsub来获得跟踪误差信号Ste，并且基于跟踪误差信号Ste。

9. 发明授权

US07139234B2 Optical pickup 失效
标题翻译：光学拾音
公开(公告)号：US07139234B2
公开(公告)日：2006-11-21
申请号：US10713038
申请日：2003-11-17
申请人： Masakazu Ogasawara , Ikuya Kikuchi
发明人： Masakazu Ogasawara , Ikuya Kikuchi
IPC分类号： G11B7/135
CPC分类号： G11B7/1369 , G11B7/1353 , G11B7/13927 , G11B2007/0006
摘要： An optical pickup is provided for recording and reproduction of information onto and from an optical disk. In the optical disk, in a forward optical path, a single polarized optical beam is converted to plural polarized optical beams. Polarization modes of the plural polarized optical beams are then converted to a polarization mode suitable for one of the recording and the reproduction to produce polarization-converted optical beams and to radiate the polarization-converted optical beams to the disk. In the backward optical path, polarization modes of the polarization-converted optical beams reflected from the disk are returned to the same polarization mode as that of the plural polarized optical beams, so that plural polarized reflected optical beams are produced. Polarization modes of the plural polarized reflected optical beams are then returned to the same polarization mode as the single polarized optical mode.
摘要翻译：提供了用于在光盘上记录和再现信息的光学拾取器。在光盘中，在正向光路中，单个偏振光束被转换为多个偏振光束。然后将多个偏振光束的极化模式转换为适合于记录和再现之一的偏振模式，以产生偏振转换的光束，并将偏振转换的光束辐射到光盘。在反向光路中，从盘反射的偏振光转换光束的偏振模式返回到与多个偏振光束相同的偏振模式，从而产生多个偏振反射光束。然后，多个偏振反射光束的极化模式返回到与单偏振光学模式相同的偏振模式。

10. 发明授权

US5892748A Optical pickup for reading or recording information on a recording surface 失效
标题翻译：用于在记录表面上读取或记录信息的光学拾取器
公开(公告)号：US5892748A
公开(公告)日：1999-04-06
申请号：US611753
申请日：1996-03-06
申请人： Ikuya Kikuchi
发明人： Ikuya Kikuchi
IPC分类号： G11B7/00 , G11B7/125 , G11B7/135
CPC分类号： G11B7/1353 , G11B2007/0006 , G11B2007/0013
摘要： An optical pickup reads or records information on a recording surface of a first optical record medium or a second optical record medium, each of which has a protection film different in thickness from each other. The optical pickup includes: a light beam source for emitting a light beam; a dividing unit for dividing the light beam into a non-diffracted light, which is a portion of the light beam other than diffracted lights, and a first order diffracted light; and a converging unit for converging the non-diffracted light and the first order diffracted light. Further, an optical path length between the light beam source and the converging unit is determined so that the non-diffracted light is converged onto the recording surface of the first optical record medium and a spherical aberration of the non-diffracted light converged onto the recording surface of the first optical record medium is minimized. And the dividing unit is constructed so that the first order diffracted light is converged onto the recording surface of the second optical record medium and a spherical aberration of the first order diffracted light converged onto the recording surface of the second optical record medium is minimized.
摘要翻译：光学拾取器在第一光学记录介质或第二光学记录介质的记录表面上读取或记录信息，每个记录介质的厚度彼此不同。光拾取器包括：用于发射光束的光束源; 分割单元，用于将光束分成不是衍射光的光束的一部分的非衍射光和一级衍射光; 以及用于会聚非衍射光和一级衍射光的会聚单元。此外，确定光束源和会聚单元之间的光程长度，使得非衍射光会聚到第一光学记录介质的记录表面上，并且非衍射光的球面像差会聚到记录第一光学记录介质的表面被最小化。并且分割单元被构造成使得一级衍射光会聚到第二光学记录介质的记录表面上，并且会聚在第二光学记录介质的记录表面上的一级衍射光的球面像差被最小化。

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