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    • 5. 发明授权
    • Objective lens actuator
    • 物镜执行器
    • US07640559B2
    • 2009-12-29
    • US11643770
    • 2006-12-22
    • Kanji WakabayashiYoshiaki KommaKousei SanoHidenori WadaKeiichi MatsuzakiToshiyasu Tanaka
    • Kanji WakabayashiYoshiaki KommaKousei SanoHidenori WadaKeiichi MatsuzakiToshiyasu Tanaka
    • G11B7/00
    • G11B7/121G11B2007/0006
    • An objective lens actuator is provided which includes two objective lenses mounted on a movable body, and which is capable of preventing the movable body from coming into contact or collision with a disk and whose thickness becomes thinner. When a light beam is concentrated and focused on a high-density optical disk, D1 represents the distance between the disk surface and the part of the movable body in the closest position to the disk; when a light beam is concentrated and focused on a CD, D2 represents the distance between the disk surface and the part of the movable body in the closest position to the disk; when a light beam is concentrated and focused on a DVD, D3 represents the distance between the disk surface and the part of the movable body in the closest position to the disk; and the following relational expression (1) is satisfied, D1
    • 提供一种物镜致动器,其包括安装在可移动体上的两个物镜,并且能够防止可移动体与盘接触或碰撞并且其厚度变薄。 当光束集中并聚焦在高密度光盘上时,D1表示盘表面与可移动体的最靠近盘的位置之间的距离; 当光束集中并聚焦在CD上时,D2表示盘表面和可移动体的与光盘最靠近位置的部分之间的距离; 当光束集中并聚焦在DVD上时,D3表示在与盘最靠近的位置的盘表面和可移动体的部分之间的距离; 并满足以下关系式(1)D1
    • 6. 发明申请
    • OPTICAL HEAD AND OPTICAL INFORMATION DEVICE
    • 光头和光信息设备
    • US20090310465A1
    • 2009-12-17
    • US12096807
    • 2006-12-12
    • Yoshiaki KommaKanji WakabayashiKousei SanoToshiyasu TanakaKeiichi MatsuzakiHidenori Wada
    • Yoshiaki KommaKanji WakabayashiKousei SanoToshiyasu TanakaKeiichi MatsuzakiHidenori Wada
    • G11B7/135G02B3/00G02B17/00
    • G11B7/1395G11B2007/0006
    • An optical head according to the present invention includes: a first light source that emits light with a first wavelength; a beam splitter that splits the light emitted from the first light source into a first light beam traveling in a first direction and a second light beam traveling in a second direction different from the first direction; a first collimator lens for changing degrees of divergence of the first light beam; a first mirror that changes the traveling directions of the first light beam, of which the degrees of divergence have been changed; a first objective lens for converging the first light beam, which has had its traveling directions changed, toward a storage layer of a first optical disk; a mover that holds the first objective lens; a first photodetector that receives the first light beam reflected from the storage layer of the first optical disk and converts it into an electrical signal; a condenser lens for condensing the second light beam; and a second photodetector that receives the second light beam condensed by the condenser lens and converts it into an electrical signal.
    • 根据本发明的光头包括:发射具有第一波长的光的第一光源; 将从第一光源发射的光分成沿第一方向传播的第一光束和沿与第一方向不同的第二方向行进的第二光束的分束器; 用于改变第一光束的发散度的第一准直透镜; 改变其偏离度的第一光束的行进方向的第一反射镜; 用于将其行进方向改变的第一光束会聚到第一光盘的存储层的第一物镜; 保持第一个物镜的移动器; 第一光电检测器,其接收从第一光盘的存储层反射的第一光束并将其转换为电信号; 聚光透镜,用于冷凝第二光束; 以及第二光电检测器,其接收由聚光透镜聚光的第二光束并将其转换成电信号。
    • 7. 发明申请
    • OPTICAL PICKUP, OPTICAL DISC DRIVE DEVICE, AND OPTICAL INFORMATION DEVICE
    • 光学拾取,光盘驱动器件和光信息器件
    • US20090086330A1
    • 2009-04-02
    • US12280601
    • 2007-01-23
    • Keiichi MatsuzakiYoshiaki KommaToshiyasu TanakaKousei SanoKanji WakabayashiHidenori Wada
    • Keiichi MatsuzakiYoshiaki KommaToshiyasu TanakaKousei SanoKanji WakabayashiHidenori Wada
    • G02B13/18
    • G11B7/1353G11B7/1362G11B7/1376G11B7/13925G11B2007/0013
    • A small optical pickup of wide spherical aberration correction range is provided. The optical pickup includes a rising mirror for deflecting a light beam at substantially right angle and guiding to an entrance surface of the objective lens; a spherical aberration correction lens having one surface formed to a larger curvature than the other surface; a lens holder for holding the spherical aberration correction lens so that the surface of large curvature partially projects out towards the rising mirror side; a guide member extending in an optical axis direction of the spherical aberration correction lens sand having an end arranged to the side of a reflecting surface of the rising mirror; and a slidable part slidable along the guide member; wherein the projecting portion of the slidable part is configured to be fitted within the side surface of the reflecting surface of the rising mirror, and the projecting portion from the lens holder of the spherical aberration correction lens overlaps the reflecting surface of the rising mirror when the spherical aberration correction lens approaches the rising mirror the most.
    • 提供宽球面像差校正范围的小型光学拾取器。 光学拾取器包括用于使光束以基本上直角偏转并引导到物镜的入射表面的上升反射镜; 球面像差校正透镜,其一个表面形成为比另一个表面大的曲率; 用于保持球面像差校正透镜的透镜保持器,使得大曲率的表面部分地向上升反射镜侧突出; 引导构件,其沿球面像差校正透镜砂的光轴方向延伸,所述球面像差校正透镜砂的端部设置在所述上​​升反射镜的反射面的一侧; 以及可沿着引导构件滑动的滑动部件; 其中,所述可滑动部分的突出部分被配置成装配在所述反射镜的反射表面的侧表面内,并且当所述球面像差校正透镜的透镜保持器的突出部分与所述上升反射镜的反射表面重叠时, 球面像差校正镜最接近上升镜。