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    • 8. 发明授权
    • Optical pickup device
    • 光学拾取装置
    • US06946634B2
    • 2005-09-20
    • US10874759
    • 2004-06-24
    • Tsutomu Matsui
    • Tsutomu Matsui
    • G11B7/09G01N21/86G01V8/00G02B7/04G02B27/40G02B27/64G11B7/13G11B7/135
    • G11B7/1365G11B7/0909G11B7/1381
    • In an optical pickup device provided with an optical system for guiding and focusing three-beam laser light along a predetermined route onto a recording surface of an optical disk and guiding a reflected light from the recording surface along the same route, a transparent plate, whereof a normal line is inclined by 45° with respect to an optical axis of the reflected light and is fixed in the direction in which the component of the normal line which is vertical to the optical axis is fixed to a direction of being rotated from a horizontal direction by 45° about the optical axis, is provided on the route of the reflected light between a beam splitter and an optical sensor.
    • 在设置有用于沿着预定路径将三光束激光引导并聚焦到光盘的记录表面并沿着相同路线引导来自记录表面的反射光的光学系统的光学拾取装置中, 法线相对于反射光的光轴倾斜45°,并且沿着与光轴垂直的法线的分量固定在从水平方向旋转的方向的方向 在光束分离器和光学传感器之间的反射光的路线上设置围绕光轴的方向45°。