Photographing lens
    1.
    发明申请
    Photographing lens 有权
    摄影镜头

    公开(公告)号:US20040136097A1

    公开(公告)日:2004-07-15

    申请号:US10744770

    申请日:2003-12-23

    发明人: Young-Woo Park

    IPC分类号: G02B009/34

    摘要: The present invention is directed to a photographing lens containing, in order from an object side: a first lens having a positive refractive power and a convex surface facing the object side; a second lens having a negative refractive power; a third lens having a positive refractive power; and a fourth lens having a negative refractive power and at least one aspheric surface, the photographing lens satisfying the following conditional expressions: 1 L T f null 1.2 0.5 null f 3 f null 1.0 where LT denotes the distance on the optical axis between the object side of the first lens and the image side of the fourth lens; f denotes the total focal length of the photographing lens; and f3 denotes the focal length of the third lens.

    摘要翻译: 本发明涉及一种摄影镜头,其从物体侧依次包括具有正折光力的第一透镜和面向物体侧的凸面; 具有负屈光力的第二透镜; 具有正屈光力的第三透镜; 以及具有负屈光力和至少一个非球面的第四透镜,所述拍摄透镜满足以下条件表达式: 1 > 0.5 / MO> 1.0 其中 LT表示第一透镜的物体侧与第四透镜的像侧之间的光轴上的距离; f表示拍摄镜头的总焦距; f3表示第三透镜的焦距。

      ZOOM LENS
      2.
      发明申请
      ZOOM LENS 有权
      变焦镜头

      公开(公告)号:US20040257671A1

      公开(公告)日:2004-12-23

      申请号:US10853669

      申请日:2004-05-25

      IPC分类号: G02B015/14

      CPC分类号: G02B13/18 G02B15/177

      摘要: The zoom lens comprises, in order from an object side: a first lens group having a negative refractive power, the first lens group including a first lens having a negative refractive power, and a second lens having a positive refractive power; a second lens group having a positive refractive power, the second lens group including a third lens having a positive refractive power, and a fourth lens having a negative refractive power; and a third lens group having a positive refractive power, the third lens group including a fifth lens having a positive refractive power, the zoom lens satisfying the following conditional expression: 1 - 3.0

      摘要翻译: 变焦透镜从物体侧依次包括具有负屈光力的第一透镜组,第一透镜组包括具有负折光力的第一透镜和具有正折光力的第二透镜; 具有正屈光力的第二透镜组,所述第二透镜组包括具有正折光力的第三透镜和具有负屈光力的第四透镜; 和具有正折光力的第三透镜组,所述第三透镜组包括具有正屈光力的第五透镜,所述变焦透镜满足以下条件表达式: 1 - 3.0 << / MO> MI> f - 2.0 其中f1表示第一透镜组的焦距; fw表示广角位置处的总焦距。