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    • 5. 发明授权
    • Optical pick-up device for both focus and error tracking detection
    • 用于聚焦和误差跟踪检测的光学拾取装置
    • US4687916A
    • 1987-08-18
    • US754816
    • 1985-07-12
    • Masami EmotoHideo Inuzuka
    • Masami EmotoHideo Inuzuka
    • G11B7/09G11B7/135G01J1/20
    • G11B7/1372G11B7/0908G11B7/0916G11B7/1381
    • An optical pick-up device suitable for use in an optical disk memory system includes a semiconductor laser unit which emits a laser light beam which, in turn, passes through a beam splitter, a quarter-wave plate, and an objective lens to impinge on an optical disc thereby forming a light spot thereon. The light is then reflected from the disc and this reflected light passes through the objective lens and the quarter-wave plate and its direction of advancement is altered by the beam splitter to move into a convergent lens. Then, as the reflected light further advances, it is partly blocked by a tracking error detecting sensor and the remaining non-blocked portion of the reflected light impinges upon a focusing error detecting sensor. The objective and convergent lenses have f.sub.0 and f.sub.1 as their focal distances, respectively, and, preferably, ratio f.sub.0 /f.sub.1 is set equal to or larger than approximately 10.
    • 适用于光盘存储器系统的光学拾取装置包括:半导体激光器单元,其发射激光束,该激光光束又穿过分束器,四分之一波片和物镜,以撞击 从而在其上形成光点。 然后光从盘反射并且该反射光穿过物镜,并且四分之一波片及其前进方向由分束器改变以移动到会聚透镜。 然后,随着反射光进一步前进,其被跟踪误差检测传感器部分地阻挡,并且反射光的剩余非阻挡部分撞击聚焦误差检测传感器。 目标和会聚透镜分别具有f0和f1作为它们的焦距,并且优选地将比率f0 / f1设置为等于或大于约10。
    • 7. 发明授权
    • Optical disk apparatus
    • 光盘装置
    • US5086422A
    • 1992-02-04
    • US529235
    • 1990-05-25
    • Toshimichi HagiyaJunichi WatanabeTetsuo KannoHideo InuzukaMakoto YamahataMasaaki SofueYoshiaki Aota
    • Toshimichi HagiyaJunichi WatanabeTetsuo KannoHideo InuzukaMakoto YamahataMasaaki SofueYoshiaki Aota
    • G11B7/0037G11B25/04G11B33/02G11B33/12G11B33/14
    • G11B33/121G11B25/043G11B33/027G11B33/1486G11B7/0037
    • An optical disk apparatus for an optical disk enclosed in a disk cartridge comprises a casing for accommodating the cartridge through a cassette insertion aperture formed therein. A disk drive motor for rotating the optical disk, a loading assembly for detachably loading the cartridge on the disk drive motor, and an optical pickup device for recording data on and/or reproducing data from the optical disk are provided in the casing. Deflecting member provided for sealing the periphery of the optical pickup device against the flow of outside air introduced in the casing. A specific air-seal or door structure is provided for preventing introduction of air from the cassette insertion aperture into the casing. In the case that the optical pickup device comprises an optical head casing and an optical system accommodated in the optical head casing, the optical head casing is provided with air-supply means for supplying pressurized air into the optical head casing to maintain the interior of the optical head casing at a pressure higher than the exterior thereof.
    • 用于封装在盘盒中的光盘的光盘装置包括:用于通过形成在其中的盒插入孔容纳盒的壳体。 用于旋转光盘的盘驱动马达,用于可拆卸地将卡盘装载到盘驱动马达上的装载组件和用于在光盘上记录和/或再现数据的光拾取装置设置在外壳中。 偏转构件被设置用于抵抗引入到壳体中的外部空气的流动来密封光学拾取装置的周边。 提供特定的空气密封或门结构以防止空气从盒插入孔引入壳体。 在光拾取装置包括容纳在光头壳体中的光学头壳体和光学系统的情况下,光学头壳体设置有用于将加压空气供应到光学头壳体中以保持内部的空气供应装置 光学头壳体的压力高于其外部。