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    • 33. 发明授权
    • Rear focusing zoom lens
    • 后聚焦变焦镜头
    • US6094312A
    • 2000-07-25
    • US121093
    • 1998-07-23
    • Hiroki Nakayama
    • Hiroki Nakayama
    • G02B15/173G02B15/14
    • G02B15/173
    • A zoom lens having a first lens unit remaining stationary and having positive refracting power, a second lens unit having negative refracting power, a third lens unit having positive refracting power, a fourth lens unit having negative refracting power and a fifth lens unit remaining stationary and having positive refracting power to perform zooming by moving at least the second lens unit and the fourth lens unit and to perform focusing an infinite object to a nearest object by moving the fourth lens unit toward the image surface.
    • 具有第一透镜单元保持静止且具有正折射力的变焦透镜,具有负折射力的第二透镜单元,具有正折射率的第三透镜单元,具有负折射率的第四透镜单元和保持静止的第五透镜单元, 具有正折射力以通过至少移动第二透镜单元和第四透镜单元进行变焦,并且通过将第四透镜单元朝向图像表面移动来将无限大的物体聚焦到最近的物体。
    • 35. 发明授权
    • Zoom Lens
    • 变焦镜头
    • US5111338A
    • 1992-05-05
    • US654191
    • 1991-02-12
    • Hiroki Nakayama
    • Hiroki Nakayama
    • G02B15/177
    • G02B15/177
    • A zoom lens comprising, from front to rear, a first lens unit of negative power, a seconde lens unit of positive power, a third lens unit of positive power and a fourth lens unit of negative power, wherein zooming from the wide-angle end to the telephoto end is performed by moving at least the second and fourth lens units toward the object side in such a way that the air separations between the first and second lens units and between the third and fourth lens units are shorter in the telephoto end than in the wide-angle end.
    • 一种变焦透镜,包括从前到后具有负功率的第一透镜单元,正光焦度的第二透镜单元,正光焦度的第三透镜单元和负功率的第四透镜单元,其中,从广角端 通过使第二透镜单元和第四透镜单元朝向物体侧移动,使得第一透镜单元和第二透镜单元之间以及第三透镜单元和第四透镜单元之间的空气分离在远摄端较短,从而进行远摄端的处理比 在广角端。
    • 37. 发明授权
    • Objective of variable focal length
    • 可变焦距的目的
    • US4776679A
    • 1988-10-11
    • US872139
    • 1986-06-09
    • Nozomu KitagishiHiroki NakayamaShigeyuki SudaJun HattoriAkihisa Horiuchi
    • Nozomu KitagishiHiroki NakayamaShigeyuki SudaJun HattoriAkihisa Horiuchi
    • G02B15/14G02B3/00G02B15/16G02B15/173
    • G02B15/173
    • A variable focal length objective of which at least one of a pulrality of lens units is moved to vary the image magnification, wherein at least one of the plurality of lens units has at least one refractive index distribution type lens provided with a condition of N.sub.1 >0 as, taking the distance from the optical axis to a radial direction as h, the refractive index distribution is expressed by N(h)=N.sub.0 +N.sub.1 h.sup.2 +N.sub.2 h.sup.4 +N.sub.3 h.sup.6 +. . . (N.sub.0, N.sub.1, N.sub.2 . . . are constants), and satisfies the following conditions: ##EQU1## where fmax: the maximum focal length;fmin: the minimum focal length;Lmin: the optical total length when the total length is shortest;Y: the maximum image height;N.sub.1 *: the coefficient of h.sup.2 of the refractive index distribution type lens having a refractive index distribution of N.sub.1 >0;D*: the lens thickness of the refractive index distribution type lens having the refractive index distribution of N.sub.1 >0.
    • 可变焦距物镜,其中移动透镜单元的脉冲中的至少一个以改变图像放大率,其中多个透镜单元中的至少一个具有至少一个折射率分布型透镜,其具有N1> 0,从光轴到径向的距离为h,折射率分布由N(h)= N0 + N1h2 + N2h4 + N3h6 +表示。 。 。 (N0,N1,N2 ...是常数),满足以下条件: SIGMA 2N1 * D *> 0.2 / fmin其中fmax:最大焦距; fmin:最小焦距; Lmin:总长度最短时的光学总长度; Y:最大图像高度; N1 *:折射率分布为N1> 0的折射率分布型透镜的h2的系数; D *:折射率分布为N1> 0的折射率分布型透镜的透镜厚度。
    • 40. 发明授权
    • Zoom lens and image pickup apparatus including same
    • 缩放透镜和包括其的图像拾取装置
    • US08264779B2
    • 2012-09-11
    • US12895575
    • 2010-09-30
    • Hiroki NakayamaChiaki InoueMasaru Sakamoto
    • Hiroki NakayamaChiaki InoueMasaru Sakamoto
    • G02B15/14
    • G02B15/173G02B13/009
    • A zoom lens includes, in order from an object side to an image side and arranged along an optical axis, first to fifth lens units having positive, negative, positive, positive or negative, and positive refractive power, respectively. When zooming, the second lens unit moves monotonically to the image side, the third lens unit moves to the object side in a convex locus, the fifth lens unit moves nonlinearly, and the first and fourth lens units do not move. The fourth lens unit includes a first sub lens unit and a second sub lens unit; the first sub lens unit is an image-stabilizing lens unit that includes a first lens having negative refractive power and a second lens having positive or negative refractive power. The focal length of the fourth lens unit, the focal length of the entire system at the wide-angle end, the Abbe numbers of the materials of the first and second lenses are set appropriately based on predetermined conditions.
    • 变焦透镜从物体侧到像侧依次沿光轴布置,分别具有正,负,正,正或负和正屈光力的第一至第五透镜单元。 当变焦时,第二透镜单元单调地移动到图像侧,第三透镜​​单元以凸形轨迹移动到物体侧,第五透镜单元非线性移动,第一和第四透镜单元不移动。 第四透镜单元包括第一子透镜单元和第二子透镜单元; 第一子透镜单元是包括具有负折光力的第一透镜和具有正或负折射光焦度的第二透镜的图像稳定透镜单元。 基于预定条件适当地设置第四透镜单元的焦距,广角端处的整个系统的焦距,第一和第二透镜的材料的阿贝数。