公开(公告)号：US08014258B2

公开(公告)日：2011-09-06

申请号：US12776223

申请日：2010-05-07

申请人： Tomoto Kawamura ,  Yoshiro Konishi ,  Toshimasa Kamisada ,  Yasuo Kitada

发明人： Tomoto Kawamura ,  Yoshiro Konishi ,  Toshimasa Kamisada ,  Yasuo Kitada

IPC分类号： G11B7/00

CPC分类号： G11B7/1376 ,  G11B2007/0006

摘要： An optical pickup includes a first source which emits a first beam with a first wavelength; a second source which emits a second beam with a wavelength shorter than the first wavelength; a first collimate lens which collimates the first beam; a second collimate lens which collimates the second beam; a first objective lens which converges the first collimated beam onto an optical disc; and a second objective lens which converges the second collimated beam onto the disc. The first and second objective lenses are arranged in the disc radial direction. The second objective lens is arranged closer to the side of the disc outer circumference than the first objective lens. The first collimate lens is arranged on the right-hand side when the second objective lens is viewed from the first objective lens. The second collimate lens is arranged on the left-hand side when the first objective lens is viewed from the second objective lens. The gap between the first collimate lens and the first objective lens is larger than the gap between the second collimate lens and the second objective lens.

摘要翻译： 光拾取器包括：发射具有第一波长的第一光束的第一光源; 发射波长短于第一波长的第二光束的第二光源; 准直第一光束的第一准直透镜; 准直第二光束的第二准直透镜; 将第一准直光束会聚到光盘上的第一物镜; 以及将第二准直光束会聚到盘上的第二物镜。 第一和第二物镜被配置在盘径向。 第二物镜比第一物镜更靠近盘外周侧。 当从第一物镜观察第二物镜时，第一准直透镜布置在右手侧。 当从第二物镜观察第一物镜时，第二准直透镜布置在左手侧。 第一准直透镜和第一物镜之间的间隙大于第二准直透镜和第二物镜之间的间隙。

公开(公告)号：US07978587B2

公开(公告)日：2011-07-12

申请号：US12497966

申请日：2009-07-06

申请人： Toshimasa Kamisada ,  Yasuo Kitada ,  Kazuyoshi Yamazaki ,  Tomoto Kawamura ,  Yoshiro Konishi

发明人： Toshimasa Kamisada ,  Yasuo Kitada ,  Kazuyoshi Yamazaki ,  Tomoto Kawamura ,  Yoshiro Konishi

IPC分类号： G11B7/135

CPC分类号： G11B7/133 ,  G11B7/0901 ,  G11B7/0906 ,  G11B7/094 ,  G11B7/0943 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1381 ,  G11B2007/0013

摘要： An optical pickup apparatus is provided with a dividing element having a plurality of regions. The dividing element is capable of dividing a light flux reflected by the optical disc into a plurality of light fluxes having different outgoing directions. Each region of the dividing element and light receiving parts of a light detector are structured such that when a target information recording layer of the optical disc is brought into focus, a light flux reflected from the target information recording layer is focused on the light receiving parts of the light detector, and a light flux reflected from other information recording layer than the target information recording layer is not irradiated onto the light receiving parts of the light detector.

摘要翻译： 光拾取装置具有多个区域的分割元件。 分割元件能够将由光盘反射的光束分成具有不同输出方向的多个光束。 分光元件的各个区域和光检测器的受光部分被构造为使得当光盘的目标信息记录层被聚焦时，从目标信息记录层反射的光束聚焦在光接收部分 并且从目标信息记录层的其它信息记录层反射的光束不被照射到光检测器的光接收部分上。

公开(公告)号：US20060233069A1

公开(公告)日：2006-10-19

申请号：US11453639

申请日：2006-06-14

申请人： Hiromitsu Mori ,  Kyuichiro Nagai ,  Atsushi Inoue ,  Toshimasa Kamisada ,  Ryuichiro Mizuno

发明人： Hiromitsu Mori ,  Kyuichiro Nagai ,  Atsushi Inoue ,  Toshimasa Kamisada ,  Ryuichiro Mizuno

IPC分类号： G11B7/00

CPC分类号： G11B5/5526 ,  G11B5/59677 ,  G11B7/00

摘要： The invention provides an optical disc apparatus which restricts an operation sound generated from an objective lens driving portion of an optical pickup and has a reduce sound, in an optical disc apparatus, in particular, an optical disc apparatus installing a microphone for recording an external voice therein. Coils (107, 108), a magnet (109) and opposing surfaces of a yoke (110) are respectively arranged at substantially point symmetrical positions with respect to an optical axis (111) of an objective lens (103) in a state in which no electric current is applied, the yoke (110) and a unit base (117) are connected via a spring member (118), and the unit base (117) is mounted to a casing (120). In this case, the spring member (118) is connected at a position (121) forward apart from the objective lens (103) with respect to the yoke (110), and is formed so as to have at least a deformation freedom in a direction of the optical axis of the objective lens (103). The casing (120) is made in a closed structure surrounding a space in which the unit base (117), a lens holder (106), the yoke (110) and the magnet (109) are arranged, except a surface opposing to a disc-like recording medium (104).