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    • 1. 发明授权
    • Zoom lens system
    • 变焦镜头系统
    • US07057828B2
    • 2006-06-06
    • US10834810
    • 2004-04-28
    • Akihisa Horiuchi
    • Akihisa Horiuchi
    • G02B15/14
    • G02B27/646G02B15/173
    • A zoom lens system is disclosed, comprising, in order from an object side to an image side, a first lens unit of positive optical power, a second lens unit of negative optical power, a third lens unit of positive optical power, and a fourth lens unit of positive optical power, wherein the second and fourth lens units are moved during zooming. The third lens unit consists of a first lens subunit of positive optical power, an aperture stop, and a second lens subunit having one or more negative lens elements and one or more positive lens elements, in order from the object to the image sides. Optical parameters including the focal length of each lens unit, lens shapes, the lens structure of each lens unit are specified to realize a zoom lens system with a smaller size of the entire lens system and higher optical performance.
    • 公开了一种变焦透镜系统,其从物体侧到像侧依次包括正光焦度的第一透镜单元,负光焦度的第二透镜单元,正光焦度的第三透镜单元和第四透镜单元 具有正光焦度的透镜单元,其中第二和第四透镜单元在变焦期间移动。 第三透镜单元由从物体到像侧的顺序由正光焦度的第一透镜子单元,孔径光阑和具有一个或多个负透镜元件和一个或多个正透镜元件的第二透镜子单元组成。 指定包括每个透镜单元的焦距,透镜形状,每个透镜单元的透镜结构的光学参数以实现具有整个透镜系统的较小尺寸的变焦透镜系统和更高的光学性能。
    • 3. 发明申请
    • Zoom lens system and image pickup apparatus having the same
    • 变焦透镜系统和具有该变焦透镜系统的图像拾取装置
    • US20050168833A1
    • 2005-08-04
    • US11044883
    • 2005-01-26
    • Akihisa Horiuchi
    • Akihisa Horiuchi
    • G02B15/20G02B13/18G02B15/167G02B15/173G02B15/14
    • G02B15/173
    • Disclosed is a zoom lens system, in order from an object side to an image side, including: a first lens unit having a positive optical power; a second lens unit having a negative optical power; a third lens unit having a positive optical power; and a fourth lens unit having a positive optical power, in which during zooming, intervals of the lens units are changed. In such a zoom lens system, a material having a large refractive index is adopted for a material constituting a negative lens element disposed on the most object side in the second lens unit, whereby high optical performance is realized while the whole lens system is miniaturized.
    • 公开了一种从物体侧到图像侧的变焦透镜系统,包括: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; 具有正光焦度的第三透镜单元; 以及具有正光焦度的第四透镜单元,其中在变焦期间,透镜单元的间隔改变。 在这种变焦透镜系统中,对于构成设置在第二透镜单元中的最物体侧的负透镜元件的材料,采用折射率大的材料,从而在整个透镜系统小型化的同时实现高的光学性能。
    • 5. 发明授权
    • Zoom lens and image taking apparatus having the same
    • 具有相同的变焦镜头和摄像装置
    • US06754009B2
    • 2004-06-22
    • US10372539
    • 2003-02-24
    • Akihisa Horiuchi
    • Akihisa Horiuchi
    • G02B1514
    • G02B15/173
    • This specification discloses a zoom lens of novel construction in which ghost or flare caused by the reflection between a filter member and an image pickup surface suppressed. This zoom lens is provided, in succession from the front to the rear, with a first lens unit of positive power, a second lens unit of negative power moved during zooming, a stop unit, a third lens unit of positive power, and a fourth lens unit of positive power moved during zooming. The stop unit has a stop blade forming an aperture, and a filter member for attenuating the quantity of light passing through the aperture. The filter member is so disposed as to be inclined with respect to the optical axis of the zoom lens.
    • 本说明书公开了一种新颖结构的变焦镜头,其中由过滤构件和图像拾取表面之间的反射引起的重影或闪光被抑制。 该变焦镜头从前到后连续地设置有正功率的第一透镜单元,在变焦期间移动的负功率的第二透镜单元,止动单元,正功率的第三透镜单元和第四透镜单元 变焦时移动正电源的镜头单元。 停止单元具有形成孔的止动刀片和用于衰减通过该孔的光量的过滤器构件。 过滤构件被设置为相对于变焦透镜的光轴倾斜。
    • 6. 发明授权
    • Rear focus type zoom lens and optical apparatus using the same
    • 后焦距变焦镜头和使用其的光学装置
    • US06392817B1
    • 2002-05-21
    • US09625850
    • 2000-07-26
    • Akihisa Horiuchi
    • Akihisa Horiuchi
    • G02B1514
    • G02B15/173
    • A rear focus type zoom lens has, in succession from the object side, a first lens unit L1 of positive refractive power, a second lens unit L2 of negative refractive power, a third lens unit L3 of positive refractive power and a fourth lens unit L4 of positive refractive power. The second lens unit is moved toward the image plane side to effect a focal length change from the wide angle end to the telephoto end. The fourth lens unit is moved to correct the fluctuation of the image plane resulting from a focal length change and the fourth lens unit is moved to effect focusing. The third lens unit has a stop most adjacent to the image plane side. The surface thereof adjacent to the stop is convex toward the image plane side and aspherical. When the focal lengths of the entire system at the wide angle end and the telephoto end are defined as fw and ft, respectively, and the F number of the wide angle end is defined as FNW, and the focal length of the second lens unit is defined as f2, the following conditional expression is satisfied: 0.8
    • 后焦点型变焦透镜从物体侧依次具有正屈光力的第一透镜单元L1,负折光力的第二透镜单元L2,正折光力的第三透镜单元L3和第四透镜单元L4 的正屈光力。 第二透镜单元朝向像面侧移动以实现从广角端到望远端的焦距变化。 移动第四透镜单元以校正由焦距变化导致的图像平面的波动,并且第四透镜单元移动以实现聚焦。 第三透镜单元具有与图像平面侧最相邻的止挡部。 与挡块相邻的表面朝向像面侧凸出,并且是非球面的。 当广角端和远摄端的整个系统的焦距分别被定义为fw和ft,广角端的F数被定义为FNW,并且第二透镜单元的焦距为 定义为f2,满足以下条件表达式:
    • 8. 发明授权
    • Zoom lens
    • 变焦镜头
    • US5612825A
    • 1997-03-18
    • US399513
    • 1995-03-07
    • Akihisa HoriuchiNobuyuki Tochigi
    • Akihisa HoriuchiNobuyuki Tochigi
    • G02B15/173G02B15/14
    • G02B15/173
    • A zoom lens of the rear focus type is disclosed comprising, from front to rear, a first lens unit of positive refractive power, a second lens unit of negative refractive power, a third lens unit of positive refractive power and a fourth lens unit of positive refractive power, the second and fourth lens units axially moving to effect zooming, and the fourth lens unit axially moving to effect focusing. The third lens unit includes at least one positive lens at a front position and a negative lens of meniscus form concave toward the image side at a rearmost position. The fourth lens unit includes one negative lens and two positive lenses. The focal lengths f3 and f4 of the third and fourth lens units, respectively, satisfy the following condition:0.73
    • 公开了一种后焦点类型的变焦透镜,包括从正面到背面的正屈光力的第一透镜单元,负折光力的第二透镜单元,正折光力的第三透镜单元和正折射力的第四透镜单元 屈光力,第二透镜单元和第四透镜单元轴向移动以实现变焦,并且第四透镜单元轴向移动以实现聚焦。 第三透镜单元包括在前位置处的至少一个正透镜和弯月面的负透镜在最后面的位置朝向图像侧凹入。 第四透镜单元包括一个负透镜和两个正透镜。 第三和第四透镜单元的焦距f3和f4分别满足以下条件:0.73
    • 10. 发明授权
    • Zoom lens
    • 变焦镜头
    • US5225937A
    • 1993-07-06
    • US623556
    • 1990-12-07
    • Akihisa Horiuchi
    • Akihisa Horiuchi
    • G02B15/16G02B15/17
    • G02B15/17
    • A zoom lens is disclosed comprising, from front to rear, a first lens unit of positive power, a second lens unit of negative power, a third lens unit of negative power and a fourth lens unit of positive power, zooming being performed by moving the second and third lens units axially in differential relation, whereby the focal length F2 of the second lens unit lies in the following range:0.09
    • 公开了一种变焦透镜,包括从前到后的正功率的第一透镜单元,负功率的第二透镜单元,负功率的第三透镜单元和正功率的第四透镜单元,通过移动 第二透镜单元和第三透镜单元在轴向上具有差异关系,由此第二透镜单元的焦距F2在以下范围内:0.09 <| F2 /FT‖<0.14其中FT是整个透镜系统的最长焦距。 这样,虽然光学总长度比以往任何时候都短,但是变焦镜头获得较高的焦距变化范围。