公开(公告)号：US20100254236A1

公开(公告)日：2010-10-07

申请号：US12602718

申请日：2008-05-29

申请人： Eishin Mori ,  Kousei Sano ,  Joji Anzai ,  Hideki Aikoh

发明人： Eishin Mori ,  Kousei Sano ,  Joji Anzai ,  Hideki Aikoh

IPC分类号： G11B20/10 ,  G11B7/135

CPC分类号： G11B7/13925 ,  G11B7/1376 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An object of the invention is to suppress an influence of a wavefront aberration which is generated at the time of correcting a third-order spherical aberration, and realize satisfactory information recording and/or reproducing. A collimator lens 4 corrects a third-order spherical aberration which is generated depending on the thickness of a light transmissive layer from a surface of a first optical information recording medium 30, corresponding to an optimal substrate thickness of a first objective lens 6, to an intended information recording surface, assuming that the light transmissive layer thickness of the first optical information recording medium 30 which minimizes a residual third-order spherical aberration at the time of incidence of parallel light into the first objective lens 6 is defined as the optimal substrate thickness of the first objective lens 6. The optimal substrate thickness of the first objective lens 6 is defined in such a manner that a variation of a wavefront aberration which is generated on the information recording surface of the first optical information recording medium 30 farthest from the first objective lens 6 at the time of correcting the third-order spherical aberration, and a variation of a wavefront aberration which is generated on the information recording surface of the first optical information recording medium 30 closest to the first objective lens 6 at the time of correcting the third-order spherical aberration are set equal to each other.

摘要翻译： 本发明的目的是抑制在校正三次球面像差时产生的波前像差的影响，并且实现满意的信息记录和/或再现。 准直透镜4将与第一光学信息记录介质30的表面相对应的透光层的厚度相应于第一物镜6的最佳基板厚度的三次球面像差校正为 假设将平行光入射到第一物镜6中的残余三阶球面像差最小化的第一光学信息记录介质30的透光层厚度定义为最佳基板厚度 第一物镜6的最佳基板厚度被定义为使得在第一光信息记录介质30的信息记录表面上产生的波前像差的变化最远离第一物镜6的第一物镜6。 在校正三次球面像差时的物镜6，以及a 在校正三次球面像差时在最靠近第一物镜6的第一光学信息记录介质30的信息记录表面上产生的波前像差的变化被设置为彼此相等。

公开(公告)号：US20100220578A1

公开(公告)日：2010-09-02

申请号：US12159425

申请日：2006-12-27

申请人： Fumitomo Yamasaki ,  Katsuhiko Hayashi ,  Sadao Mizuno ,  Hideki Aikoh

发明人： Fumitomo Yamasaki ,  Katsuhiko Hayashi ,  Sadao Mizuno ,  Hideki Aikoh

IPC分类号： G11B7/135 ,  G02B11/02 ,  G02B13/18

CPC分类号： G02B9/10 ,  G02B3/08 ,  G02B13/18 ,  G11B7/1275 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

摘要： Provides an objective lens, an optical head and an optical disc apparatus (drive) capable of compensating for various types of aberrations including wavelength changes for a plurality of types of optical discs including high density optical discs, DVDs and CDs with a good wavelength dispersion compensation ability and thus capable of providing good recording or reproduction characteristics.The objective lens according to the present invention includes a first lens and a second lens substantially in close contact with each other such that optical axes thereof match each other, and acts as a convex lens as a whole. Each lens includes a central portion including the optical axis and a peripheral portion located in a periphery of the central portion. The central portion of the first lens acts as a convex lens; and the central portion of the second lens acts as a concave lens. Where the refractive index of the first lens at d line (wavelength: 587.56 nm) is nd1, the Abbe constant of the first lens represented using the refractive indices at d line, F line (wavelength: 486.13 nm) and C line (wavelength: 656.27 nm) is νd1, the refractive index of the second lens at d line is nd2, and the Abbe constant of the second lens represented using the refractive indices at d line, F line and C line is νd2, the objective lens fulfills nd1>nd2 and νd1>νd2.

摘要翻译： 提供能够补偿包括具有良好的波长色散补偿的高密度光盘，DVD和CD的多种类型的光盘的波长变化的各种像差的物镜，光头和光盘装置（驱动器） 因此能够提供良好的记录或再现特性。 根据本发明的物镜包括基本上彼此紧密接触的第一透镜和第二透镜，使得其光轴彼此匹配，并且作为整体起凸透镜的作用。 每个透镜包括包括光轴的中心部分和位于中心部分的周边的周边部分。 第一透镜的中心部分用作凸透镜; 并且第二透镜的中心部分用作凹透镜。 在d线（波长：587.56nm）处的第一透镜的折射率为nd1的情况下，使用在d线，F线（波长：486.13nm）和C线（波长：48nm）处的折射率表示的第一透镜的阿贝常数 656.27nm）是d1，d线的第二透镜的折射率为nd2，使用d线，F线和C线的折射率表示的第二透镜的阿贝常数为d2，目标 镜头满足nd1> nd2和＆ngr; d1>＆ngr; d2。

公开(公告)号：US20090303864A1

公开(公告)日：2009-12-10

申请号：US12375648

申请日：2007-07-27

申请人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh

发明人： Takayuki Nagata ,  Joji Anzai ,  Hideki Aikoh

IPC分类号： G11B7/26

CPC分类号： G11B7/24038

摘要： An optical recording medium is provided with a plurality of recording layers, wherein the recording layers are formed such that all the spacings between two recording layers in all the combinations selected from the plurality of recording layers do not coincide with each other. Accordingly, the return of lights reflected by other layers to an optical head along the same optical path as reflected light from a readout layer during the reproduction can be avoided. Therefore, an optical recording medium, from which a good reproduction signal can be obtained, can be provided by suppressing the deterioration of a servo signal and a reproduction signal of a reproducing device due to a variation of interference fringes on a light receiving element.

摘要翻译： 光记录介质设置有多个记录层，其中记录层形成为使得从多个记录层中选出的所有组合中的两个记录层之间的所有间距彼此不一致。 因此，可以避免在再现期间将来自其它层反射的光沿与读出层反射的光沿相同的光路返回。 因此，可以通过抑制由于光接收元件上的干涉条纹的变化而导致的再现装置的伺服信号的劣化和再现信号的劣化来提供从其获得良好再现信号的光记录介质。

公开(公告)号：US20090201789A1

公开(公告)日：2009-08-13

申请号：US12088555

申请日：2006-10-02

申请人： Hideki Nakata ,  Hideki Aikoh

发明人： Hideki Nakata ,  Hideki Aikoh

IPC分类号： G11B7/135

CPC分类号： G11B7/1374 ,  G11B7/1362 ,  G11B2007/0006

摘要： An optical head device has at least one upward-reflecting mirror, objective lenses, an objective lens actuator, and a moving mechanism. The upward-reflecting mirror receives an incident luminous flux having a wavelength emitted from a semiconductor, and changes its direction. The objective lenses having mutually different numerical apertures condenses the luminous flux whose direction has been changed by the upward-reflecting mirror to radiate a condensed luminous flux onto an information recording medium. The objective lens actuator moves the objective lenses in the focus direction of the information recording medium so that the luminous flux incident on the information recording medium becomes in a focused state. The moving mechanism moves the upward-reflecting mirror so that the luminous flux is incident on the information recording medium via any one of the objective lenses.

摘要翻译： 光学头装置具有至少一个向上反射镜，物镜，物镜致动器和移动机构。 向上反射镜接收从半导体发射的波长的入射光束，并改变其方向。 具有相互不同的数值孔径的物镜将通过向上反射镜改变方向的光通量聚集在信息记录介质上，以将会聚的光通量照射到信息记录介质上。 物镜致动器在信息记录介质的聚焦方向上移动物镜，使得入射到信息记录介质上的光束成为聚焦状态。 移动机构使向上反射镜移动，使得光通量经由任何一个物镜入射到信息记录介质上。

公开(公告)号：US20090135687A1

公开(公告)日：2009-05-28

申请号：US12279061

申请日：2007-02-13

申请人： Eishin Mori ,  Akihiro Arai ,  Joji Anzai ,  Hideki Aikoh

发明人： Eishin Mori ,  Akihiro Arai ,  Joji Anzai ,  Hideki Aikoh

IPC分类号： G11B7/00

CPC分类号： G11B7/131 ,  G11B7/0908 ,  G11B7/1353 ,  G11B2007/0013

摘要： An optical head includes a hologram which extracts, from a luminous flux of reflected light from an optical disk, at least a first luminous flux branch which does not include the optical axis of the luminous flux; and a photodetector which receives the reflected light from the optical disk and produces signal output, wherein the photodetector has light-receiving areas which receive the first luminous flux branch of reflected light from an optical information recording medium layer targeted for recording or playback out of the plurality of optical information recording medium layers of the optical disk, the light-receiving areas are placed in such a way that the signal output resulting from a light spot formed by the first luminous flux branch of the reflected light from the optical information recording medium layer targeted for recording or playback is practically the same between the first and second photodetection areas, and a boundary line of the light-receiving areas is located in such a position as not to include light spots formed by luminous fluxes of reflected light from the optical information recording medium layers other than the optical information recording medium layer targeted for recording or playback.

摘要翻译： 光头包括从光盘的反射光的光束提取不包括光束的光轴的至少第一光束分支​​的全息图; 以及光接收器，其接收来自光盘的反射光并产生信号输出，其中光电检测器具有光接收区域，其接收来自用于记录或回放的光信息记录介质层的反射光的第一光束分支 光盘的多个光信息记录介质层，光接收区域被放置成使得由来自光信息记录介质层的反射光的由第一光束分支​​形成的光斑产生的信号输出 在第一和第二光检测区域之间进行记录或重放的目标是相同的，并且光接收区域的边界线位于不包括由来自光信息的反射光的光束形成的光点 记录介质层以外的光信息记录介质层 录音或播放。

公开(公告)号：US20090072818A1

公开(公告)日：2009-03-19

申请号：US11918613

申请日：2006-04-18

申请人： Osamu Mizuno ,  Hiroshi Yamamoto ,  Takuya Wada ,  Hideki Aikoh ,  Kanji Wakabayashi ,  Takatoshi Yukimasa

发明人： Osamu Mizuno ,  Hiroshi Yamamoto ,  Takuya Wada ,  Hideki Aikoh ,  Kanji Wakabayashi ,  Takatoshi Yukimasa

IPC分类号： G01B7/14

CPC分类号： G01D5/145 ,  G11B7/08505 ,  G11B7/1378 ,  G11B7/13925 ,  G11B2007/0013

摘要： As imaging devices are miniaturized, and optical devices are miniaturized, lens moving mechanisms are also miniaturized. Thus, position sensors for them are required to be miniaturized and have high accuracy at low cost. A magnet 2 of a pillar shape and a yoke 3 which move in X axis direction with respect to a magnetic field detection element 1 are provided, and a shape of a cross section of the yoke 3 which is orthogonal to a longitudinal direction of the magnet 2 changes along the longitudinal direction.

摘要翻译： 随着成像装置小型化，光学装置小型化，透镜移动机构也小型化。 因此，它们的位置传感器需要小型化并且以低成本具有高精度。 设置有相对于磁场检测元件1在X轴方向上移动的柱状的磁体2和磁轭3，并且与磁体的长度方向正交的磁轭3的截面形状 2沿纵向变化。

公开(公告)号：US20090040909A1

公开(公告)日：2009-02-12

申请号：US11918780

申请日：2006-04-20

申请人： Joji Anzai ,  Hideki Aikoh ,  Akihiro Arai ,  Hideki Nakata ,  Fumitomo Yamasaki ,  Yoshiaki Komma

发明人： Joji Anzai ,  Hideki Aikoh ,  Akihiro Arai ,  Hideki Nakata ,  Fumitomo Yamasaki ,  Yoshiaki Komma

IPC分类号： G11B7/135

CPC分类号： G11B7/1275 ,  G11B7/1356 ,  G11B2007/0006

摘要： An optical head device is provided with a light source 1 for emitting a plurality of lights having different wavelengths, an objective lens 31 for focusing a light spot on an optical disc 21, an objective lens 32 for focusing light spots on optical discs 22 to 24, and a prism 53 for splitting a laser light having a wavelength of 405 nm from the light source 1 into a transmitting light and a reflected light, introducing the reflected light to the objective lens 31 and the transmitting light to the objective lens 32, and introducing laser lights having wavelengths of 660 nm, 780 nm from the light source 1 to the objective lens 32.

摘要翻译： 光头装置设置有用于发射具有不同波长的多个光的光源1，用于将光点聚焦在光盘21上的物镜31，用于将光点聚焦在光盘22至24上的物镜32 以及棱镜53，用于将来自光源1的具有405nm波长的激光分解成透射光和反射光，将反射光引导到物镜31和透射光到物镜32，以及 将从光源1到物镜32的波长为660nm，780nm的激光引入。

公开(公告)号：US20090016196A1

公开(公告)日：2009-01-15

申请号：US11909379

申请日：2006-03-20

申请人： Hideki Aikoh ,  Makoto Takashima ,  Takao Hayashi ,  Akira Yoshikawa ,  Tomio Yamamoto ,  Kouretsu Boku

发明人： Hideki Aikoh ,  Makoto Takashima ,  Takao Hayashi ,  Akira Yoshikawa ,  Tomio Yamamoto ,  Kouretsu Boku

IPC分类号： G11B7/00

CPC分类号： G11B33/1446 ,  G11B7/121 ,  G11B17/0282

摘要： An optical disk device of the present application includes: a turntable 30 including plural induction grooves 31a to 31h as concave portions radially extending from vicinity of a center of the turntable 30 and having open portions in an outer periphery of the turntable 30 and plural through-holes 32a to 32h penetrating bottom faces 33a to 33h on the vicinity of the center side of the plural induction grooves 31a to 31h and a top face of the turntable 30; and an outer rotor type spindle motor 35 provided with plural fins 36a to 36h as convex portions on a rotor on a side face thereof. The optical disk device of the present application utilizes an airflow generated by rotation of the rotor of the spindle motor 35 and the turntable 30 in conjunction therewith as a dust removing wind for removing dust attaching to an objective lens side area.

摘要翻译： 本申请的光盘装置包括：转盘30，其具有作为从转盘30的中心附近径向延伸的凹部的多个感应槽31a〜31h，在转台30的外周具有开口部， 在多个感应槽31a〜31h的中心侧附近的底面33a〜33h以及转台30的上表面的贯通孔32a〜32h的孔32a〜 以及外转子型主轴电动机35，在其侧面的转子上设置有作为凸部的多个翅片36a〜36h。 本申请的光盘装置利用由主轴电机35的转子和转盘30的旋转而产生的气流作为除尘附着到物镜侧区域的除尘风。

公开(公告)号：US20080084797A1

公开(公告)日：2008-04-10

申请号：US11905923

申请日：2007-10-05

申请人： Kousei Sano ,  Takayuki Nagata ,  Hideki Aikoh ,  Joji Anzai ,  Fumitomo Yamasaki

发明人： Kousei Sano ,  Takayuki Nagata ,  Hideki Aikoh ,  Joji Anzai ,  Fumitomo Yamasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/0901 ,  G11B7/131 ,  G11B7/1353 ,  G11B2007/0013

摘要： The present invention aims to generate an offset-free tracking signal and to realize a stable tracking control even if an optical disc is a multi-layer disc having three or more layers.Light receiving portions of a main region light receiving portion group is arranged between a projection line of a third dividing line on a photodetector and a projection line of a fourth dividing line on the photodetector by stray lights from information layers adjacent to the one, on which a light beam is focused, out of a plurality of information layers. Further, light receiving portions of a subregion light receiving portion group is arranged between a projection line of a first dividing line on a photodetector and a projection line of a second dividing line on the photodetector by the stray lights from the information layers adjacent to the one, on which a light beam is focused, out of the plurality of information layers.

摘要翻译： 本发明的目标是产生无偏移跟踪信号，并且即使光盘是具有三层或更多层的多层盘也能实现稳定的跟踪控制。 主区域光接收部分组的光接收部分布置在光电检测器上的第三分割线的投影线和光电检测器上的第四分割线的投影线之间，与来自与其相邻的信息层的杂散光 在多个信息层中聚焦光束。 此外，子区域光接收部分组的光接收部分被布置在光电检测器上的第一分割线的投影线和光电检测器上的第二分割线的投影线之间， 在多个信息层中聚焦光束。

公开(公告)号：US06310852B1

公开(公告)日：2001-10-30

申请号：US09415290

申请日：1999-10-08

申请人： Hironori Tomita ,  Hideki Aikoh ,  Hideki Nakata ,  Hiromichi Furukawa

发明人： Hironori Tomita ,  Hideki Aikoh ,  Hideki Nakata ,  Hiromichi Furukawa

IPC分类号： G11B700

CPC分类号： G11B7/0946 ,  G11B7/093 ,  G11B7/0932 ,  G11B7/1376 ,  G11B11/10543 ,  G11B11/10576 ,  G11B2007/13727

摘要： An optical recording/reproducing apparatus comprises: a light receiving and emitting device that emits divergent optical beams and detects various signals on a disk; a collimator lens for converting the optical beams emitted from the device into parallel beams; an objective lens for converging the optical beams of the parallel beams onto the disk; and an objective-lens drive for driving the objective lens in a focusing direction perpendicular to a recording surface of the disk and in a radial direction parallel to the recording surface. The objective-lens drive is supported by suspensions attached at one end to a lens holder for holding the objective lens and to a fixing member at their other ends. The collimator lens is positioned between the objective lens and the fixing member. Thus, the optical recording/reproducing apparatus can be reduced in size and can improve the strength of the suspensions for supporting the objective-lens drive against disturbance vibration or impact caused when the optical recording/reproducing apparatus is dropped.

摘要翻译： 一种光记录/再现装置，包括：发射发散光束并检测盘上的各种信号的光接收和发射装置; 准直透镜，用于将从装置发射的光束转换为平行光束; 用于将平行光束的光束会聚到盘上的物镜; 以及用于在与盘的记录表面垂直的聚焦方向上并且平行于记录表面的径向驱动物镜的物镜驱动器。 物镜驱动器由一端附接到用于保持物镜的透镜保持架和在其另一端处的固定构件的悬架支撑。 准直透镜位于物镜和定影部件之间。 因此，光学记录/再现装置的尺寸可以减小，并且可以提高用于支撑物镜驱动器的悬架的强度，以防止当光学记录/再现装置掉落时引起的干扰振动或冲击。