公开(公告)号：US20120243567A1

公开(公告)日：2012-09-27

申请号：US13403677

申请日：2012-02-23

申请人： Katsuhiro Seo ,  Hideya Chubachi

发明人： Katsuhiro Seo ,  Hideya Chubachi

IPC分类号： H01S3/13

CPC分类号： G01N15/1434 ,  G01N15/1459 ,  G02B27/108 ,  G02B27/144

摘要： A laser irradiation device includes: a laser light source; a mirror that reflects a part of light output from the laser light source and allows the remainder to pass; an optical detector that detects reflection light reflected by the mirror; and a feedback control circuit that receives a signal output from the optical detector and controls the output of the laser light source to keep a signal intensity constant, wherein a thickness of the mirror is set such that a distance between a beam spot of the reflection light reflected by a front surface of the mirror on the detector and a beam spot of reflection light reflected by a back surface of the mirror on the detector is equal to or more than a predetermined value.

摘要翻译： 激光照射装置包括：激光源; 反射从激光光源输出的光的一部分并允许剩余部分通过的反射镜; 检测由反射镜反射的反射光的光学检测器; 以及反馈控制电路，其接收从所述光检测器输出的信号并控制所述激光光源的输出以保持信号强度恒定，其中所述反射镜的厚度被设定为使得所述反射光束的光束点之间的距离 由检测器上的反射镜的前表面反射，并且由检测器上的反射镜的后表面反射的反射光的光束点等于或大于预定值。

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。

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。

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。

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.

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。

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。

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。

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。

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。