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    • 62. 发明授权
    • Optical pickup and optical disc apparatus
    • 光拾取和光盘装置
    • US07483357B2
    • 2009-01-27
    • US11118349
    • 2005-05-02
    • Kenji YamamotoKatsutoshi SatoNoriaki NishiMidori Kanaya
    • Kenji YamamotoKatsutoshi SatoNoriaki NishiMidori Kanaya
    • G11B7/135
    • G11B7/139G02B27/283G11B7/1275G11B7/1378G11B7/1395G11B2007/0006
    • An optical pickup housing an optical system including a collimator lens for converting laser light incident on the collimator lens into an approximately parallel light beam, and an objective lens for receiving the laser light converted into the approximately parallel light beam and focusing the laser light onto a recording medium, the optical pickup having a light source configured to emit a plurality of laser beams of different wavelengths; a magnification conversion element arranged between the collimator lens and the objective lens; a bypass optical path configured to bypass the magnification conversion element; and optical path selection unit configured to select, according to a wavelength of each of the plurality of laser beams, whether each of the plurality of laser beams is to pass through an optical path passing through the magnification conversion element or through the bypass optical path.
    • 一种光学拾取器,其容纳包括用于将入射在准直透镜上的激光转换成大致平行光束的准直透镜的光学系统,以及用于接收被转换成大致平行光束的激光并将激光聚焦到 记录介质,所述光学拾取器具有被配置为发射多个不同波长的激光束的光源; 放大转换元件,布置在准直透镜和物镜之间; 旁路光路,被配置为绕过所述放大率转换元件; 以及光路选择单元,被配置为根据所述多个激光束中的每一个的波长来选择所述多个激光束中的每一个是否穿过通过所述放大率转换元件的光路或通过所述旁路光路。
    • 69. 发明申请
    • Objective lens apparatus, optical pickup apparatus, and optical disc driving apparatus
    • 物镜装置,光学拾取装置和光盘驱动装置
    • US20070263522A1
    • 2007-11-15
    • US11790543
    • 2007-04-26
    • Kenji YamamotoNoriaki Nishi
    • Kenji YamamotoNoriaki Nishi
    • G11B7/00
    • G11B7/0935G11B7/1374G11B2007/0006
    • An objective lens apparatus is disclosed. The apparatus includes: a first objective lens with a first numerical aperture, which is capable of focusing a laser light on a first optical record medium with a first cover layer of a first thickness; a second objective lens with a second numerical aperture smaller than the first numerical aperture, which is capable of focusing the laser light on a second optical record medium with a second cover layer of a second thickness larger than the first thickness; a third objective lens with a third numerical aperture smaller than the second numerical aperture, which is capable of focusing the laser light on a third optical record medium with a third cover layer of a third thickness larger than the second thickness; and a lens holder which holds the first objective lens, the second objective lens, and the third objective lens.
    • 公开了一种物镜设备。 该装置包括:具有第一数值孔径的第一物镜,其能够将激光聚焦在具有第一厚度的第一覆盖层的第一光学记录介质上; 具有小于第一数值孔径的第二数值孔径的第二物镜,其能够将激光聚焦在具有大于第一厚度的第二厚度的第二覆盖层的第二光学记录介质上; 具有小于第二数值孔径的第三数值孔径的第三物镜,其能够将激光聚焦在具有大于第二厚度的第三厚度的第三覆盖层的第三光学记录介质上; 以及保持第一物镜,第二物镜和第三物镜的透镜保持器。