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    Fixed-focus lens
    4.
    发明授权
    Fixed-focus lens 有权
    定焦镜头

    公开(公告)号：US07505209B2

    公开(公告)日：2009-03-17

    申请号：US11684798

    申请日：2007-03-12

    申请人： Yi-Hao Kang ,  Chao-Yi Yeh

    发明人： Yi-Hao Kang ,  Chao-Yi Yeh

    IPC分类号： G02B3/00 ,  G02B9/00 ,  G02B13/04

    CPC分类号： G02B13/06

    摘要： A fixed-focus lens suitable for projecting an image beam from a light valve onto a screen is provided. The fixed-focus lens comprises a first lens group, a second lens group, and a third lens group arranged in sequence. The third lens group is disposed near the light valve. The first lens group having a negative refractive power comprises at least an aspheric lens. The second lens group having a positive refractive power comprises at least a lens. The third lens group having a positive refractive power comprises at least four lenses.

    摘要翻译： 提供了一种适用于将图像光束从光阀投影到屏幕上的固定焦距透镜。 固定焦点透镜包括依次布置的第一透镜组，第二透镜组和第三透镜组。 第三透镜组设置在光阀附近。 具有负屈光力的第一透镜组包括至少一个非球面透镜。 具有正屈光力的第二透镜组至少包括透镜。 具有正屈光力的第三透镜组包括至少四个透镜。

    Internally focusing lens system
    5.
    发明授权
    Internally focusing lens system 失效
    内部聚焦透镜系统

    公开(公告)号：US08000032B2

    公开(公告)日：2011-08-16

    申请号：US12609134

    申请日：2009-10-30

    申请人： Chao-Yi Yeh ,  Jyh-Long Chern ,  Wen-Jang Jiang

    发明人： Chao-Yi Yeh ,  Jyh-Long Chern ,  Wen-Jang Jiang

    IPC分类号： G02B13/18 ,  G02B9/34

    CPC分类号： G02B15/173

    摘要： An exemplary internally focusing lens system includes, in order from the object side to the image side, a first lens group with positive refractive power, a second lens group with negative refractive power, and a third lens group with positive refractive power. The third lens group includes one lens element. The second lens group is movable toward the image side and the first and third lens groups remain stationary during focusing of the lens system from an infinitely distant object to a nearby object.

    摘要翻译： 示例性的内部聚焦透镜系统从物体侧到像侧依次包括具有正屈光力的第一透镜组，具有负屈光力的第二透镜组和具有正折光力的第三透镜组。 第三透镜组包括一个透镜元件。 第二透镜组可朝着图像侧移动，并且第一和第三透镜组在将透镜系统从无限远物体聚焦到附近物体时保持静止。

    Projection lens
    6.
    发明授权
    Projection lens 失效
    投影镜头

    公开(公告)号：US08203792B2

    公开(公告)日：2012-06-19

    申请号：US12888385

    申请日：2010-09-22

    申请人： Chao-Yi Yeh ,  Jyh-Long Chern

    发明人： Chao-Yi Yeh ,  Jyh-Long Chern

    IPC分类号： G02B3/00

    CPC分类号： G02B13/18 ,  G02B13/16

    摘要： A projection lens comprises, from a long conjugate side to a short conjugate side, a first lens unit with positive optical power, a second lens unit with negative optical power, and a third lens unit with negative optical power. The first lens unit is configured for correcting chromatic aberration of the projection lens. The third lens unit comprises a meniscus lens which is convex toward to the short conjugate side of the projection lens.

    摘要翻译： 投影透镜包括从长共轭侧到短共轭侧的具有正光焦度的第一透镜单元，具有负光焦度的第二透镜单元和具有负光焦度的第三透镜单元。 第一透镜单元被配置用于校正投影透镜的色像差。 第三透镜单元包括朝向投影透镜的短共轭侧​​凸出的弯月形透镜。

    FIXED-FOCUS LENS
    7.
    发明申请
    FIXED-FOCUS LENS 有权
    固定镜片

    公开(公告)号：US20070268598A1

    公开(公告)日：2007-11-22

    申请号：US11684798

    申请日：2007-03-12

    申请人： Yi-Hao Kang ,  Chao-Yi Yeh

    发明人： Yi-Hao Kang ,  Chao-Yi Yeh

    IPC分类号： G02B9/12

    CPC分类号： G02B13/06

    摘要： A fixed-focus lens suitable for projecting an image beam from a light valve onto a screen is provided. The fixed-focus lens comprises a first lens group, a second lens group, and a third lens group arranged in sequence. The third lens group is disposed near the light valve. The first lens group having a negative refractive power comprises at least an aspheric lens. The second lens group having a positive refractive power comprises at least a lens. The third lens group having a positive refractive power comprises at least four lenses. A shortest distance between the first and second lens groups is S1-2, the effective focal length of the third lens group is F3, and S1-2/F3>1.51. The effective focal length of the lens closest to the screen in the first lens group is F11. The effective focal length of the fixed-focus lens is F, and F11/F

    摘要翻译： 提供了一种适用于将图像光束从光阀投影到屏幕上的固定焦距透镜。 固定焦点透镜包括依次布置的第一透镜组，第二透镜组和第三透镜组。 第三透镜组设置在光阀附近。 具有负屈光力的第一透镜组包括至少一个非球面透镜。 具有正屈光力的第二透镜组至少包括透镜。 具有正屈光力的第三透镜组包括至少四个透镜。 第一透镜组和第二透镜组之间的最短距离为S -1-2，第三透镜​​组的有效焦距为F 3 N，S 1〜 1.51 / 3/3 3。 第一透镜组中最接近屏幕的透镜的有效焦距为F 11。 固定焦距透镜的有效焦距为F，F 11 / F <-18.5。