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1. 发明授权

US06312780B1 Optical recording medium 有权
标题翻译：光记录介质
公开(公告)号：US06312780B1
公开(公告)日：2001-11-06
申请号：US09504812
申请日：2000-02-16
申请人： Yutaka Kasami , Osamu Kawakubo , Katsuhiro Seo
发明人： Yutaka Kasami , Osamu Kawakubo , Katsuhiro Seo
IPC分类号： B32B302
CPC分类号： G11B7/252 , G11B7/00454 , G11B7/006 , G11B7/24 , G11B7/2534 , G11B7/2542 , G11B7/2578 , G11B7/2585 , G11B2007/24312 , G11B2007/24314 , G11B2007/24316 , G11B2007/25708 , G11B2007/2571 , G11B2007/25711 , G11B2007/25713 , G11B2007/25715 , G11B2007/25716 , Y10S428/913 , Y10S430/146 , Y10T428/21 , Y10T428/31678
摘要： A phase change optical recording medium which enables optimum direct overwrite even under high speed high density conditions without degrading repetition durability or storage stability of recorded signals. To this end, the phase change optical recording medium has a recording layer formed at least of a phase change material and is recorded and/or reproduced with a laser light beam having a wavelength ranging between 380 nm and 420 nm. A ratio Ac/Aa, where Ac is the absorption rate of said recording layer in a crystalline state and Aa is the absorption rate of said recording layer in an amorphous state, is not less than 0.9, and a crystallization promoting layer promoting the crystallization of the phase change material is contacted with at least one surface of the recording layer. By exploiting the absorption rate control and the crystallization promotion in combination, it is possible to positively compensate the difference between the physical properties of the crystal phase and those of the amorphous phase to realize optimum direct overwrite.
摘要翻译：相变光学记录介质，即使在高速高密度条件下也能够实现最佳直接重写，而不会降低记录信号的重复耐久性或存储稳定性。为此，相变光学记录介质具有至少形成相变材料的记录层，并用波长在380nm与420nm之间的激光束进行记录和/或再现。其中Ac是结晶状态下所述记录层的吸收速率和Aa是所述记录层在无定形状态下的吸收速率的比率Ac / Aa不小于0.9，促进结晶的结晶促进层相变材料与记录层的至少一个表面接触。通过组合吸收速率控制和结晶促进，可以肯定地补偿晶相的物理性质和非晶相的物理性能之间的差异，以实现最佳的直接覆盖。

2. 发明授权

US07684305B2 Optical pickup, optical recording and reproducing apparatus and tracking error signal detecting method 失效
标题翻译：光学拾取，光学记录和再现装置以及跟踪误差信号检测方法
公开(公告)号：US07684305B2
公开(公告)日：2010-03-23
申请号：US11598579
申请日：2006-11-14
申请人： Yoshiki Okamoto , Katsuhiro Seo
发明人： Yoshiki Okamoto , Katsuhiro Seo
IPC分类号： G11B7/00
CPC分类号： G11B7/131 , G11B7/094 , G11B7/0943 , G11B7/1353
摘要： An optical pickup includes an optical system in which light from a light source is introduced through an objective lens into an optical recording medium and in which light reflected from the optical recording medium is introduced into a light-receiving unit and an objective lens driving unit for driving the objective lens based on a light output detected at said light-receiving unit. In this optical pickup, a diffraction element is provided between the light source and the objective lens, the diffraction element is provided with at least first and second diffraction areas and the first and second diffraction areas have such grating shapes that ± first-order diffracted lights diffracted are received by the light-receiving unit at the position in which 0-th order light and ± first-order diffracted lights generated from guide grooves of the optical recording medium may not overlap with each other.
摘要翻译：光学拾取器包括光学系统，其中来自光源的光通过物镜被引入到光学记录介质中，并且其中从光学记录介质反射的光被引入光接收单元和物镜驱动单元基于在所述光接收单元处检测到的光输出来驱动物镜。在该光学拾取器中，在光源和物镜之间设置衍射元件，衍射元件设置有至少第一和第二衍射区域，并且第一和第二衍射区域具有这样的光栅形状，即±一级衍射光衍射由光接收单元在从光记录介质的引导槽产生的0级光和±一级衍射光彼此不重叠的位置处接收。

3. 发明授权

US07336432B2 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：US07336432B2
公开(公告)日：2008-02-26
申请号：US11214748
申请日：2005-08-31
申请人： Katsuhiro Seo , Yoshiaki Kato , Yoshiki Okamoto , Takeshi Yonezawa
发明人： Katsuhiro Seo , Yoshiaki Kato , Yoshiki Okamoto , Takeshi Yonezawa
IPC分类号： G02B9/06
CPC分类号： G11B7/13927 , G11B7/1376 , G11B7/24038
摘要： An optical pickup includes at least a laser light source emitting a laser beam, a collimator lens system including a plurality of lenses for collimating the light beam emitted from the laser light source and incident thereupon as diffused light, and an objective lens. The laser beam transmitted through the collimator lens system is incident upon the objective lens. The collimator lens system includes a first lens unit held so as to be movable in an optical axis direction of the laser beam and a fixed second lens unit.
摘要翻译：光拾取器至少包括发射激光束的激光光源，准直透镜系统，其包括多个透镜，用于准直来自激光光源的光束并作为漫射光入射到其上;以及物镜。透射准直透镜系统的激光束入射到物镜上。准直透镜系统包括保持以能够在激光束的光轴方向上移动的第一透镜单元和固定的第二透镜单元。

4. 发明授权

US06246644B1 Optical pickup and method for manufacturing optical pickup 失效
标题翻译：光学拾取器对聚焦误差信号偏移具有减小的调制效应
公开(公告)号：US06246644B1
公开(公告)日：2001-06-12
申请号：US09098869
申请日：1998-06-17
申请人： Katsuhiro Seo
发明人： Katsuhiro Seo
IPC分类号： G11B712
CPC分类号： G11B7/00718 , G11B7/0909 , G11B7/22
摘要： An optical pickup minimizing the modulation caused on the focus error signal by grooves/lands or a train of pits, and implementing a stable focus servo operation. In an optical pickup adapted to obtain focus error information by means of an astigmatism system, the arranging state of an objective lens (5) is set so that a direction (DOB) of an astigmatism generated by the objective lens (5) will be a direction in a predetermined angle range with respect to a direction (DSD) of an astigmatism generated by an astigmatism generating element e.,g (cylindrical lens (7)). The predetermined range is an angle range of ±50° with respect to the direction (DSD) of the astigmatism.
摘要翻译：一种光学拾取器，通过凹槽/平台或一系列凹坑来最小化对聚焦误差信号造成的调制，并实现稳定的聚焦伺服操作。在适于通过像散系统获得聚焦误差信息的光学拾取器中，物镜（5）的布置状态被设置为使得由物镜（5）产生的散光的方向（DOB）将为相对于由散光生成元件e，g（柱面透镜（7））产生的像散的方向（DSD）在预定角度范围内的方向。预定范围是相对于像散方向（DSD）的±50°的角度范围。

5. 发明授权

US5249167A Optical pickup apparatus which includes a plate-like element for splitting a returning light beam into different light beams having different focussing point 失效
标题翻译：光学拾取装置，其中包括用于将返回光束分成具有不同聚焦点的不同光束的板状元件
公开(公告)号：US5249167A
公开(公告)日：1993-09-28
申请号：US735381
申请日：1991-07-24
申请人： Katsuhiro Seo
发明人： Katsuhiro Seo
IPC分类号： G11B11/10 , G11B7/09 , G11B7/13 , G11B7/135 , G11B11/105
CPC分类号： G11B7/1381 , G11B7/131 , G11B7/1356 , G11B7/1365 , G11B7/1378 , G11B7/0912
摘要： The present invention provides an optical pickup apparatus for reading informational signals written in a recording medium such as magneto-optical disc in which a flux of reflected light from a recording medium which is irradiated with a flux of light in inclinedly incident from one side upon a flat plate like transparent member having one side which is a polarization reflection surface and the other side which is a total reflection surface and fluxes of light reflected on the one side and the other side of the flat plate like transparent member are detected by a photo detecting element, whereby simplification of the structure is achieved.

6. 发明授权

US08411548B2 Optical pickup and optical disc apparatus 失效
标题翻译：光拾取和光盘装置
公开(公告)号：US08411548B2
公开(公告)日：2013-04-02
申请号：US12858520
申请日：2010-08-18
申请人： Kazuhiko Nemoto , Katsuhiro Seo , Tamotsu Ishii
发明人： Kazuhiko Nemoto , Katsuhiro Seo , Tamotsu Ishii
IPC分类号： G11B7/13
CPC分类号： G11B7/133 , G11B7/131 , G11B7/1353 , G11B2007/0013
摘要： An optical pickup includes a light source emitting a light beam, a diffraction element diffracting the light beam to separate it into a main beam and a sub beam, an objective lens focusing the main and sub beams onto a desired recording layer of an optical disc, a lens moving section moving the objective lens in focusing and tracking directions, a light-separating element separating a reflected light beam, formed by reflecting each of the main and sub beams at the recording layer, into multiple beam components and allowing the reflected light beam to travel without rotating an image thereof, and a light-receiving element having multiple light-receiving regions that optically receive the reflected light beam and generating a light reception signal based on the amount of received light to allow a signal processing section to generate a focus error signal and a tracking error signal based on the light reception signal.
摘要翻译：光拾取器包括发射光束的光源，衍射光束以将其分离成主光束和副光束的衍射元件，将主光束和子光束聚焦到光盘的期望记录层上的物镜，在聚焦和跟踪方向移动物镜的透镜移动部分，将通过将记录层中的每个主光束和副光束反射而形成的反射光束分离成多个光束分量并允许反射光束在不旋转图像的情况下行进;以及光接收元件，具有光接收反射光束的多个光接收区域，并且基于接收光量产生光接收信号，以允许信号处理部分产生焦点误差信号和基于光接收信号的跟踪误差信号。

7. 发明申请

US20120001090A1 MINUTE PARTICLE ANALYZING DEVICE AND METHOD 有权
标题翻译：分钟颗粒分析装置和方法
公开(公告)号：US20120001090A1
公开(公告)日：2012-01-05
申请号：US12829070
申请日：2010-07-01
申请人： Koji Takasaki , Katsuhiro Seo , Mitsuru Toishi , Shinji Yamada , Atsushi Fukumoto , Gary Durack
发明人： Koji Takasaki , Katsuhiro Seo , Mitsuru Toishi , Shinji Yamada , Atsushi Fukumoto , Gary Durack
IPC分类号： G01J1/58
CPC分类号： G01N15/1434 , G01J3/024 , G01J3/1256 , G01N15/1459 , G01N21/53 , G01N21/645 , G02B6/14 , G02B6/32 , G02B6/4215
摘要： A minute particle analyzing device includes: a light source; a first condenser lens for condensing light from the light source to a first end of a multimode optical fiber; a second condenser lens for condensing the light emerging from a second end of the multimode optical fiber to a minute particle; and a detector for detecting light generated from the minute particle by the application of the light from the light source.
摘要翻译：微粒分析装置包括：光源; 用于将来自光源的光聚焦到多模光纤的第一端的第一聚光透镜; 第二聚光透镜，用于将从多模光纤的第二端出射的光聚焦到微小颗粒; 以及检测器，用于通过施加来自光源的光来检测由微粒产生的光。

8. 发明申请

US20110044152A1 OPTICAL PICKUP AND OPTICAL DISC APPARATUS 失效
标题翻译：光学拾取和光盘设备
公开(公告)号：US20110044152A1
公开(公告)日：2011-02-24
申请号：US12858520
申请日：2010-08-18
申请人： Kazuhiko Nemoto , Katsuhiro Seo , Tamotsu Ishii
发明人： Kazuhiko Nemoto , Katsuhiro Seo , Tamotsu Ishii
IPC分类号： G11B7/135 , F21V5/00
CPC分类号： G11B7/133 , G11B7/131 , G11B7/1353 , G11B2007/0013
摘要： An optical pickup includes a light source emitting a light beam, a diffraction element diffracting the light beam to separate it into a main beam and a sub beam, an objective lens focusing the main and sub beams onto a desired recording layer of an optical disc, a lens moving section moving the objective lens in focusing and tracking directions, a light-separating element separating a reflected light beam, formed by reflecting each of the main and sub beams at the recording layer, into multiple beam components and allowing the reflected light beam to travel without rotating an image thereof, and a light-receiving element having multiple light-receiving regions that optically receive the reflected light beam and generating a light reception signal based on the amount of received light to allow a signal processing section to generate a focus error signal and a tracking error signal based on the light reception signal.
摘要翻译：光拾取器包括发射光束的光源，衍射光束以将其分离成主光束和副光束的衍射元件，将主光束和子光束聚焦到光盘的期望记录层上的物镜，在聚焦和跟踪方向移动物镜的透镜移动部分，将通过将记录层中的每个主光束和副光束反射而形成的反射光束分离成多个光束分量并允许反射光束在不旋转图像的情况下行进;以及光接收元件，具有光接收反射光束的多个光接收区域，并且基于接收光量产生光接收信号，以允许信号处理部分产生焦点误差信号和基于光接收信号的跟踪误差信号。

9. 发明授权

US07859953B2 Optical pickup and optical disc apparatus 失效
标题翻译：光拾取和光盘装置
公开(公告)号：US07859953B2
公开(公告)日：2010-12-28
申请号：US11768616
申请日：2007-06-26
申请人： Katsuhiro Seo
发明人： Katsuhiro Seo
IPC分类号： G11B7/12
CPC分类号： G11B7/1381 , G11B2007/0006
摘要： An optical pickup includes: a light source; an objective lens; a beam splitter; a quarter wave plate that transforms the optical beam into a circularly polarized optical beam and also transforms the circularly polarized reflection optical beam into an optical beam whose polarization direction is perpendicular to the optical beam; a light detector; a neutral density filter section placed on a mutual optical path of those beams, reducing the intensity of the optical beam while maintaining the intensity of the reflection optical beam; and a filter drive section that puts the neutral density filter section in the mutual optical path or outside of it, wherein the intensity of the optical beam and the filter drive section are controlled such that the amount of the optical beam emitted to the optical disc is maintained at a predetermined level.
摘要翻译：光拾取器包括：光源; 物镜; 分束器; 将光束变换为圆偏振光束的四分之一波片，还将圆偏振反射光束变换为偏振方向垂直于光束的光束; 光检测器放置在这些光束的相互光路上的中性浓度滤光片部分，在保持反射光束的强度的同时降低光束的强度; 以及将中性浓度滤光器部分放置在相互光路中或其外部的滤光器驱动部分，其中控制光束和滤光器驱动部分的强度，使得发射到光盘的光束的量为维持在预定水平。

10. 发明授权

US07800986B2 Optical pickup and optical disc apparatus 有权
标题翻译：光拾取和光盘装置
公开(公告)号：US07800986B2
公开(公告)日：2010-09-21
申请号：US11678395
申请日：2007-02-23
申请人： Takashi Kobayashi , Katsuhiro Seo , Yoshiki Okamoto , Noriyuki Kato
发明人： Takashi Kobayashi , Katsuhiro Seo , Yoshiki Okamoto , Noriyuki Kato
IPC分类号： G11B7/00
CPC分类号： G11B7/0901 , G11B7/123 , G11B7/131 , G11B7/1353 , G11B7/1381
摘要： An optical pickup for recording or reproducing an information signal in an optical disc includes a light source for emitting a light beam toward the optical disc, an objective lens for focusing the light beam emitted from the light source onto a recording surface of the optical disc, and a photodetector for receiving the light beam reflected by the recording surface of the optical disc and outputting a signal corresponding to an intensity of the received light beam. A spot of the light beam received by the photodetector is asymmetric in both a radial direction and a tangential direction of the optical disc. A lens shift signal for the objective lens is detected by a controller on the basis of the signal output from the photodetector, the controller controlling the objective lens to follow the optical disc.
摘要翻译：用于在光盘中记录或再现信息信号的光学拾取器包括用于向光盘发射光束的光源，用于将从光源发射的光束聚焦到光盘的记录表面上的物镜，以及光电检测器，用于接收由光盘的记录表面反射的光束，并输出与所接收的光束的强度对应的信号。由光电检测器接收的光束的光点在光盘的径向和切线方向上是不对称的。控制器根据从光电检测器输出的信号，控制物镜跟随光盘的控制器检测物镜的透镜移位信号。

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