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    • 4. 发明授权
    • Zoom lens and image projection apparatus including the same
    • 缩放透镜和包括其的图像投影设备
    • US07817345B2
    • 2010-10-19
    • US12365482
    • 2009-02-04
    • Kazuhiro Inoko
    • Kazuhiro Inoko
    • G02B15/14
    • G02B15/177G02B13/22
    • A zoom lens includes, in order from an enlargement conjugate side to a reduction conjugate side, a first lens unit of negative refractive power; a second lens unit of positive refractive power; a third lens unit of positive refractive power, the third lens unit having at least three lens elements; a middle lens unit including at least one lens unit; and a last lens unit of positive refractive power. All the lens units, except the first lens unit and the last lens unit, move during zooming. The zoom lens satisfies appropriate conditions.
    • 变焦透镜从放大共轭侧到缩小共轭侧的顺序包括负折射力的第一透镜单元; 具有正屈光力的第二透镜单元; 具有正屈光力的第三透镜单元,所述第三透镜单元具有至少三个透镜元件; 包括至少一个透镜单元的中间透镜单元; 以及具有正屈光力的最后一个透镜单元。 所有的镜头单元,除了第一个镜头单元和最后一个镜头单元,在变焦期间移动。 变焦镜头满足适当的条件。
    • 5. 发明申请
    • ILLUMINATION OPTICAL SYSTEM AND IMAGE DISPLAY APPARATUS MAKING USE THEREOF
    • 照明光学系统和图像显示设备的使用
    • US20090213338A1
    • 2009-08-27
    • US12463324
    • 2009-05-08
    • Kazuhiro Inoko
    • Kazuhiro Inoko
    • G03B21/14
    • G02B27/0966G02B27/0905H04N5/74H04N5/7441H04N9/315
    • An illumination optical system for illuminating a surface to be illuminated with a light beam from a light source, in a first plane which is parallel with the optical axis of the illumination optical system, the light beam from the light source is split, and a plurality of first light source images are formed in a first light source image zone with the use of the thus split light beams; light beams from the plurality of first light source images being led to the surface to be illuminated, in a second plane which is parallel with the optical axis of the illumination optical system and which is perpendicular to the first plane, the light beam from the light source is split, and a plurality of second light source images are formed in a second light source image zone, with the use of the thus split light beams, light beams from the plurality of second light source images being led to the surface to be illuminated, where the width of the first light source image zone in the first plane is greater than that of the second light source image zone in the second plane.
    • 一种照明光学系统,用于在与照明光学系统的光轴平行的第一平面中用来自光源的光束照射待照射的表面,来自光源的光束被分离,并且多个 第一光源图像通过使用这样分离的光束形成在第一光源图像区域中; 来自多个第一光源图像的光束被引导到与照明光学系统的光轴平行且垂直于第一平面的第二平面中,来自光的光束 源分离,并且在第二光源图像区域中形成多个第二光源图像,通过使用这样分离的光束,来自多个第二光源图像的光束被引导到要被照射的表面 其中第一平面中的第一光源图像区的宽度大于第二平面中的第二光源图像区的宽度。
    • 6. 发明授权
    • Zoom lens and image projection apparatus
    • 变焦镜头和图像投影设备
    • US07576921B2
    • 2009-08-18
    • US12055637
    • 2008-03-26
    • Kazuhiro Inoko
    • Kazuhiro Inoko
    • G02B9/00G02B15/14
    • G02B15/177
    • The zoom lens includes a plurality of lens units. The first lens unit is disposed closest to a magnification side in the plurality of lens units and has a negative optical power, and magnification-varying lens units that are disposed closer to a reduction side than the first lens unit and moves for variation of magnification. The first lens unit includes, in order from the magnification side, a first-A lens sub-unit having a negative optical power and a first-B lens sub-unit having a positive optical power. For focusing from an infinite side to a close side, the first-A and first-B lens sub-units move as a distance therebetween increases, and the first-B lens sub-unit moves toward the reduction side. The zoom lens is capable of correcting well variation of curvature of field due to a projection distance change and has a good optical performance.
    • 变焦镜头包括多个透镜单元。 第一透镜单元设置成与多个透镜单元中的放大倍数最靠近并且具有负光焦度,以及放大率变化透镜单元,其设置为比第一透镜单元更靠近还原侧并且移动以用于变化。 第一透镜单元从放大倍率依次包括具有负光焦度的第一A透镜子单元和具有正光焦度的第一B透镜子单元。 对于从无限侧到近距离的聚焦,第一A和第一B透镜子单元随着它们之间的距离而移动,并且第一-B透镜子单元向着还原侧移动。 变焦镜头由于投射距离变化而能够校正曲率的良好变化,并且具有良好的光学性能。