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    • 7. 发明授权
    • Imaging lens, imaging device and information device
    • 成像镜头,成像设备和信息设备
    • US09297983B2
    • 2016-03-29
    • US14082538
    • 2013-11-18
    • Takashi Kubota
    • Takashi Kubota
    • G02B9/60G02B9/62G02B15/14G02B13/00
    • G02B9/60G02B9/62G02B13/0045G02B15/14
    • An imaging lens including seven or fewer lenses which constitute an entire system of an optical system comprising, in order from an object side to an imaging side: a first lens group having a positive refractive power; a second lens group having a positive refractive power; and a third lens group having a negative refractive power, wherein the first lens group includes a lens having a negative refractive power and a lens having a positive refractive power, an aperture stop being disposed in the first lens group, the second lens group includes one lens having a negative refractive power and one lens having a positive refractive power, and the third lens group including one lens having a negative refractive power and a concave surface on the object side.
    • 一种成像透镜,包括构成光学系统的整个系统的七个或更少透镜,其包括从物体侧到成像侧的顺序:具有正折射光焦度的第一透镜组; 具有正屈光力的第二透镜组; 以及具有负屈光力的第三透镜组,其中所述第一透镜组包括具有负屈光力的透镜和具有正屈光力的透镜,所述第一透镜组中设置有孔径光阑,所述第二透镜组包括一个 具有负屈光力的透镜和具有正屈光力的一个透镜,并且第三透镜组包括在物体侧具有负屈光力和凹面的一个透镜。
    • 9. 发明申请
    • IMAGE DISPLAY DEVICE
    • 图像显示设备
    • US20140185144A1
    • 2014-07-03
    • US14142122
    • 2013-12-27
    • Takashi Kubota
    • Takashi Kubota
    • G02B13/04
    • G02B15/177G02B13/04G02B13/16G02B15/20
    • An image display device includes a high-performance projection zoom lens with a very wide field angle and an image display device including a projection zoom lens of a five-lens-group type, which achieves high performance across the entire zoom area. The image display device is configured to project an image onto a target projection surface and display a magnified image of the image, which uses a projection zoom lens having a five-lens-group configuration in which first to fifth lens groups G1 to G5 are arranged from the magnification side toward the reduction side, and each of the constituent lens groups or lenses included in the lens groups has a combination of negative and positive refractive powers, and in the lens configuration, focal lengths of the constituent lens groups, relative travel distances, lens distances to the image display element, and constituent lens shapes are properly selected.
    • 图像显示装置包括具有非常宽的视场角的高性能投影变焦透镜和包括五透镜组类型的投影变焦透镜的图像显示装置,其在整个变焦区域上实现高性能。 图像显示装置被配置为将图像投影到目标投影面上并显示图像的放大图像,其使用具有第五至第五透镜组配置的投影变焦透镜,其中布置有第一至第五透镜组G1至G5 并且透镜组中包括的构成透镜组或透镜中的每一个具有负折射和正折射力的组合,并且在透镜构造中,构成透镜组的焦距,相对行进距离 ,适当地选择到图像显示元件的透镜距离和构成透镜形状。