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    • 1. 发明申请
    • OPTICAL PICKUP DEVICE HAVING A WAVELENGTH SELECTING FILM AND AN OPTICAL REFLECTOR
    • 具有波长选择膜和光反射器的光学拾取器件
    • US20080031121A1
    • 2008-02-07
    • US11867601
    • 2007-10-04
    • Hiroshi KATAYAMAShinichi TOKUNO
    • Hiroshi KATAYAMAShinichi TOKUNO
    • G11B7/135
    • G11B7/1263G11B7/1275G11B7/1356G11B2007/0006
    • An optical pickup device has first and second light sources that emit first and second laser beams of different wavelengths, an object lens that concentrates the first and second laser beams on a data recording surface of an optical disk, an optical separator disposed between the first and second light sources and the object lens, and an optical monitor that detects a quantity of light of the second laser beam. The optical separator has a wavelength selecting film that, on one hand, reflects the first laser beam emitted from the first light source toward the object lens and, on the other hand, transmits the second laser beam emitted from the second light source to the object lens, and a reflector that reflects a part of the second laser beam emitted from the second light source toward the optical monitor.
    • 光学拾取装置具有发射不同波长的第一和第二激光束的第一和第二光源,将第一和第二激光束集中在光盘的数据记录表面上的物镜,设置在第一和第二激光束之间的光学分离器 第二光源和物镜,以及检测第二激光束的光量的光学监视器。 光学分离器具有波长选择膜,其一方面将从第一光源发射的第一激光束反射到物镜,另一方面将从第二光源发射的第二激光束透射到物体 透镜和将从第二光源发射的第二激光束的一部分反射到光学监视器的反射器。