公开(公告)号：US20070206451A1

公开(公告)日：2007-09-06

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。

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。

公开(公告)号：US20070280085A1

公开(公告)日：2007-12-06

申请号：US11804907

申请日：2007-05-21

申请人： Katsuhiro Seo ,  Yoshiki Okamoto ,  Noriyuki Kato

发明人： Katsuhiro Seo ,  Yoshiki Okamoto ,  Noriyuki Kato

IPC分类号： G11B7/00

CPC分类号： G11B7/0903 ,  G11B7/0906 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1381 ,  G11B2007/0006

摘要： An optical disc device performs tracking control using a light amount difference at two overlapping areas. The optical disc device includes a splitter, objective lens, detection-signal generator, tracking-signal generator, and driver. The splitter splits the light beam from a light source into a main beam and sub-beams. The objective lens converges the split beams and illuminates a signal-recording-layer track. The detection-signal generator receives reflected light beams and generates a detection signal according to the reflected-light-beam light amounts. The tracking-signal generator generates a tracking error signal on the basis of the detection signal. The driver drives the objective lens in a tracking direction on the basis of the tracking error signal. The splitter causes the light amounts of the overlapping areas at sub-reflected-light beams to be less than a light amount of an area other than the overlapping areas.

摘要翻译： 光盘装置使用两个重叠区域的光量差进行跟踪控制。 光盘装置包括分光器，物镜，检测信号发生器，跟踪信号发生器和驱动器。 分流器将来自光源的光束分成主光束和子光束。 物镜会聚分离光束并照亮信号记录层光道。 检测信号发生器接收反射光束并根据反射光束光量产生检测信号。 跟踪信号发生器基于检测信号产生跟踪误差信号。 驱动器基于跟踪误差信号在跟踪方向上驱动物镜。 分路器使得副反射光束处的重叠区域的光量小于重叠区域以外的区域的光量。

公开(公告)号：US20070109930A1

公开(公告)日：2007-05-17

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：US20060050413A1

公开(公告)日：2006-03-09

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： G02B9/00

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：US08169713B2

公开(公告)日：2012-05-01

申请号：US12795134

申请日：2010-06-07

申请人： Katsuhiro Seo ,  Yoshiki Okamoto ,  Mamoru Suzuki ,  Akira Suzuki

发明人： Katsuhiro Seo ,  Yoshiki Okamoto ,  Mamoru Suzuki ,  Akira Suzuki

IPC分类号： G02B15/14 ,  G02B1/06

CPC分类号： G02B3/14 ,  G02B15/00

摘要： Disclosed herein is a zoom lens, including: an object side lens group disposed on the object side and including a first variable lens having a deformation surface, the object side lens group having a focal length varied by deformation of the first variable lens; an image side lens group disposed on the image side with respect to the object side lens group with an aperture stop sandwiched therebetween and including a second variable lens having a deformation surface, the image side lens group having a focal length varied by deformation of the second variable lens; and a lens group disposed between the object side lens group and the image side lens group and including the aperture stop. The deformation of the first and second variable lenses is controlled to carry out power variation and carry out image surface movement compensation and focusing by the power variation.

摘要翻译： 本发明公开了一种变焦透镜，包括：物体侧透镜组，其设置在物体侧并且包括具有变形面的第一可变透镜，所述物体侧透镜组具有随着所述第一可变透镜的变形而变化的焦距; 相对于物镜侧透镜组设置在像侧的像侧透镜组，其间夹有孔径光阑，并且包括具有变形面的第二可变透镜，所述像侧透镜组的焦距由第二透镜组的变形而变化 可变透镜; 以及设置在物体侧透镜组和像侧透镜组之间并且包括孔径光阑的透镜组。 控制第一和第二可变透镜的变形以进行功率变化，并通过功率变化进行图像表面移动补偿和聚焦。

公开(公告)号：US20110002043A1

公开(公告)日：2011-01-06

申请号：US12795134

申请日：2010-06-07

申请人： Katsuhiro Seo ,  Yoshiki Okamoto ,  Mamoru Suzuki ,  Akira Suzuki

发明人： Katsuhiro Seo ,  Yoshiki Okamoto ,  Mamoru Suzuki ,  Akira Suzuki

IPC分类号： G02B15/00 ,  G02B3/14

CPC分类号： G02B3/14 ,  G02B15/00

摘要： Disclosed herein is a zoom lens, including: an object side lens group disposed on the object side and including a first variable lens having a deformation surface, the object side lens group having a focal length varied by deformation of the first variable lens; an image side lens group disposed on the image side with respect to the object side lens group with an aperture stop sandwiched therebetween and including a second variable lens having a deformation surface, the image side lens group having a focal length varied by deformation of the second variable lens; and a lens group disposed between the object side lens group and the image side lens group and including the aperture stop. The deformation of the first and second variable lenses is controlled to carry out power variation and carry out image surface movement compensation and focusing by the power variation.

摘要翻译： 本发明公开了一种变焦透镜，包括：物体侧透镜组，其设置在物体侧并且包括具有变形面的第一可变透镜，所述物体侧透镜组具有随着所述第一可变透镜的变形而变化的焦距; 相对于物镜侧透镜组设置在像侧的像侧透镜组，其间夹有孔径光阑，并且包括具有变形面的第二可变透镜，所述像侧透镜组的焦距由第二透镜组的变形而变化 可变透镜; 以及设置在物体侧透镜组和像侧透镜组之间并且包括孔径光阑的透镜组。 控制第一和第二可变透镜的变形以进行功率变化，并通过功率变化进行图像表面移动补偿和聚焦。

公开(公告)号：US07778141B2

公开(公告)日：2010-08-17

申请号：US11932200

申请日：2007-10-31

申请人： Katsuhiro Seo ,  Takashi Kobayashi ,  Yoshiki Okamoto

发明人： Katsuhiro Seo ,  Takashi Kobayashi ,  Yoshiki Okamoto

IPC分类号： G11B7/00

CPC分类号： G11B7/1365 ,  G02B27/286

摘要： The present invention can simplify the configuration of a polarization adjustment plate. According to the present invention, the crystal axis of the polarization adjustment wavelength plate 32 is so arranged as to be turned up from the X-Y plane being an orthogonal plane with respect to the optical axis 40a, and the wavelength dependence which the crystal material is originally provided with is largely expressed, and further the thickness “ta” with respect to the optical axis 40a is set up such that the phase difference Δ to be brought about at the beam center becomes low from 360°+180°=540° being a desired design value to irradiate the optical beam as the P-polarization by a predetermined difference value or 60°.

摘要翻译： 本发明可以简化偏振调节板的结构。 根据本发明，偏振调节波长板32的晶轴被布置成从相对于光轴40a的正交平面的XY平面翻转，并且晶体材料原来的波长依赖性 大大地表示，并且进一步相对于光轴40a的厚度“ta”被设置为使得相位差“Dgr” 在360°+ 180°= 540°处，在光束中心处的光束变为低于将光束作为P偏振光照射预定差值或60°的期望设计值。

公开(公告)号：US20070036058A1

公开(公告)日：2007-02-15

申请号：US11500413

申请日：2006-08-08

申请人： Yoshiki Okamoto ,  Katsuhiro Seo

发明人： Yoshiki Okamoto ,  Katsuhiro Seo

IPC分类号： G11B7/135

CPC分类号： G11B7/1381 ,  G11B7/1353 ,  G11B7/1359 ,  G11B7/1395 ,  G11B2007/0013

摘要： A method for separating light coming from an illuminated multilayer medium having a plurality of reflective surfaces to reach a light receiver through a focusing lens includes the steps of splitting the light traveling toward the light receiver through the focusing lens into at least two portions along the optical axis thereof and separating a light component coming from a particular position of the illuminated medium from each of the split portions of the light by removing a light component focused at a position closer to the focusing lens than the focal position of the light component coming from the particular position between the two focal positions and/or removing a light component focused at a position closer to the light receiver than the focal position of the light component coming from the particular position between the two focal positions.

摘要翻译： 用于分离来自具有多个反射表面的照明多层介质的光以通过聚焦透镜到达光接收器的方法包括以下步骤：将通过聚焦透镜朝向光接收器传播的光分成沿光学至少两个部分 并且通过去除聚焦在比聚焦透镜更靠近聚焦透镜的位置处的光分量，将来自照明介质的特定位置的光分量从光分离部分分离出来 两个焦点位置之间的特定位置和/或去除聚焦在更靠近光接收器的位置处的光分量比来自两个焦点位置之间的特定位置的光分量的焦点位置。

公开(公告)号：US07492676B2

公开(公告)日：2009-02-17

申请号：US11859165

申请日：2007-09-21

申请人： Yoshiki Okamoto ,  Katsuhiro Seo

发明人： Yoshiki Okamoto ,  Katsuhiro Seo

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/1381 ,  G11B2007/0013

摘要： An optical pickup for recording/reproducing information on/from an optical disc having recording layers, includes a light source; an objective lens for condensing an optical beam emitted from the light source on the recording layer; a photo-detector having a light-receiving section for receiving return light from the optical disc; an optical-path separating unit for separating the optical path of the return light reflected by the optical disc from the optical path of the optical beam emitted from the light source; and a masking member having a masking unit shielding part of a passing-through optical beam, in which the masking unit shields the central region of the optical beam to be incident in the light-receiving section among the optical beams reflected by the other recording layers or surfaces different from the recording layer recording/reproducing information so as not to admit the central region to the light-receiving section.

摘要翻译： 一种用于在具有记录层的光盘上记录/再现信息的光学拾取器，包括光源; 用于将从光源发射的光束聚光在记录层上的物镜; 光检测器，具有用于从光盘接收返回光的光接收部分; 光路分离单元，用于将由光盘反射的返回光的光路与从光源发射的光束的光路分离; 以及遮蔽构件，其具有通过光束的掩模单元屏蔽部分，其中所述掩蔽单元屏蔽由所述其它记录层反射的光束中的入射在所述光接收部分中的所述光束的中心区域 或与记录层记录/再现信息不同的表面，以便不将中心区域接纳到光接收部分。