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    • 1. 发明授权
    • Imaging lens
    • 成像镜头
    • US08842378B2
    • 2014-09-23
    • US13363766
    • 2012-02-01
    • Yoji KubotaKenichi KubotaHitoshi HiranoIchiro Kurihara
    • Yoji KubotaKenichi KubotaHitoshi HiranoIchiro Kurihara
    • G02B9/34G02B13/04G02B3/02G02B13/00
    • G02B13/004G02B9/34
    • An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having negative refractive power; and a fourth lens having negative refractive power, arranged from an object side to an image plane side. In the first lens, a curvature radius on an object-side surface is positive and a curvature radius of an image-side surface is negative. In the third lens, curvature radii of an object-side surface and an image-side surface are both negative. In the fourth lens, curvature radii of an object-side surface and an image-side surface thereof are both positive. When the whole lens system has a focal length f and a distance from the object-side surface of the first lens to an image-side surface of the fourth lens is L14, the imaging lens satisfies the following expression: 0.5
    • 成像透镜包括具有正折光力的第一透镜; 具有负屈光力的第二透镜; 具有负屈光力的第三透镜; 以及从物体侧到像面侧配置的具有负屈光力的第四透镜。 在第一透镜中,物体侧表面上的曲率半径为正,图像侧表面的曲率半径为负。 在第三透镜中,物体侧表面和图像侧表面的曲率半径均为负。 在第四透镜中,物体侧表面和图像侧表面的曲率半径均为正。 当整个透镜系统具有焦距f并且从第一透镜的物体侧表面到第四透镜的像侧表面的距离为L14时,成像透镜满足以下表达式:0.5
    • 4. 发明申请
    • IMAGING LENS
    • 成像镜头
    • US20120200945A1
    • 2012-08-09
    • US13445154
    • 2012-04-12
    • Yoji KUBOTAKenichi KubotaHitoshi HiranoIchiro Kurihara
    • Yoji KUBOTAKenichi KubotaHitoshi HiranoIchiro Kurihara
    • G02B9/34
    • G02B13/004
    • An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having positive refractive power; and a fourth lens having positive refractive power, arranged from an object side to an image plane side. In the first lens, a curvature radius on an object-side surface is positive and a curvature radius of an image-side surface is negative. In the second lens, curvature radii of an object-side surface and an image-side surface are both positive. In the third lens, curvature radii of an object-side surface and an image-side surface thereof are both negative. When the whole lens system has a focal length f and a distance from the object-side surface of the first lens to an image-side surface of the fourth lens is L14, the imaging lens satisfies the following expression: 0.5
    • 成像透镜包括具有正折光力的第一透镜; 具有负屈光力的第二透镜; 具有正折射光焦度的第三透镜; 以及从物体侧到像面侧布置的具有正折光力的第四透镜。 在第一透镜中,物体侧表面上的曲率半径为正,图像侧表面的曲率半径为负。 在第二透镜中,物体侧表面和图像侧表面的曲率半径均为正。 在第三透镜中,物体侧表面和图像侧表面的曲率半径均为负。 当整个透镜系统具有焦距f并且从第一透镜的物体侧表面到第四透镜的像侧表面的距离为L14时,成像透镜满足以下表达式:0.5
    • 5. 发明授权
    • Imaging lens
    • 成像镜头
    • US08508648B2
    • 2013-08-13
    • US13206136
    • 2011-08-09
    • Yoji KubotaKenichi KubotaHitoshi HiranoIchiro KuriharaYoshio IseSumio Fukuda
    • Yoji KubotaKenichi KubotaHitoshi HiranoIchiro KuriharaYoshio IseSumio Fukuda
    • H04N5/225G02B3/02G02B9/34
    • G02B13/004
    • An imaging lens includes an aperture stop ST, a first lens L1 that is shaped to form a meniscus lens that directs a convex surface to the object side near an optical axis and has positive refractive power, a second lens L2 that is shaped to form a meniscus lens that directs a convex surface to the object side near the optical axis and has negative refractive power, a third lens L3 that is shaped to form a meniscus lens that directs a concave surface to the object side near the optical axis and has positive refractive power, and a fourth lens L4 that is shaped to form a meniscus lens that directs a convex surface to the object side near the optical axis, arranged in this order from an object side to an image side. When the first lens L1 has a focal length f1 and the second lens L2 has a focal length f2, the imaging lens is configured such that a relationship 0.3
    • 成像透镜包括孔径光阑ST,第一透镜L1,其被成形为形成朝向光轴附近的物体侧的凸形表面并具有正折光力的弯月形透镜;第二透镜L2,其被成形为 弯曲透镜,其将凸表面引导到靠近光轴的物体侧并具有负折光力;第三透镜L3,其被成形为形成弯曲透镜,其将凹面指向靠近光轴的物体侧并且具有正折射率 功率以及第四透镜L4,其被成形为形成从物体侧到像侧依次布置的凸起表面朝向光轴附近的物体侧的弯月形透镜。 当第一透镜L1具有焦距f1并且第二透镜L2具有焦距f2时,成像透镜被配置为使得满足关系0.3 <| f1 / f2 | <0.7。
    • 6. 发明授权
    • Imaging lens
    • 成像镜头
    • US08477434B2
    • 2013-07-02
    • US13445154
    • 2012-04-12
    • Yoji KubotaKenichi KubotaHitoshi HiranoIchiro Kurihara
    • Yoji KubotaKenichi KubotaHitoshi HiranoIchiro Kurihara
    • G02B9/34G02B13/18
    • G02B13/004
    • An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having positive refractive power; and a fourth lens having positive refractive power, arranged from an object side to an image plane side. In the first lens, a curvature radius on an object-side surface is positive and a curvature radius of an image-side surface is negative. In the second lens, curvature radii of an object-side surface and an image-side surface are both positive. In the third lens, curvature radii of an object-side surface and an image-side surface thereof are both negative. When the whole lens system has a focal length f and a distance from the object-side surface of the first lens to an image-side surface of the fourth lens is L14, the imaging lens satisfies the following expression: 0.5
    • 成像透镜包括具有正折光力的第一透镜; 具有负屈光力的第二透镜; 具有正折射光焦度的第三透镜; 以及从物体侧到像面侧布置的具有正折光力的第四透镜。 在第一透镜中,物体侧表面上的曲率半径为正,图像侧表面的曲率半径为负。 在第二透镜中,物体侧表面和图像侧表面的曲率半径均为正。 在第三透镜中,物体侧表面和图像侧表面的曲率半径均为负。 当整个透镜系统具有焦距f并且从第一透镜的物体侧表面到第四透镜的像侧表面的距离为L14时,成像透镜满足以下表达式:0.5
    • 10. 发明授权
    • Imaging lens
    • 成像镜头
    • US08477435B2
    • 2013-07-02
    • US13478762
    • 2012-05-23
    • Yoji KubotaKenichi KubotaHitoshi HiranoIchiro KuriharaYoshio IseSumio Fukuda
    • Yoji KubotaKenichi KubotaHitoshi HiranoIchiro KuriharaYoshio IseSumio Fukuda
    • G02B9/34G02B13/18
    • G02B13/004G02B9/34G02B13/18
    • An imaging lens, although compact, has satisfactorily corrected aberrations. The imaging lens is configured by disposing, in sequence from the object side, a stop (ST); a first lens (L1), which has a double convex shape near the optical axis; a meniscus-shaped negative second lens (L2) which has near the optical axis a convex surface facing the object side; a meniscus-shaped positive third lens (L3) which has near the optical axis a concave surface facing the object side; and a positive fourth lens (L4) which has a double convex shape near the optical axis. In the configuration, the refractive power of the first lens (L1) is greater than the refractive power of each of the second lens (L2), the third lens (L3), and the fourth lens (L4).
    • 成像透镜虽然紧凑,但令人满意地校正了像差。 成像透镜通过从物体侧依次设置止动件(ST)而构成; 第一透镜(L1),其在光轴附近具有双凸形状; 弯液面状的负第二透镜(L2),其在光轴附近具有面向物体侧的凸面; 在光轴附近具有面向物体侧的凹面的弯液面状的正的第三透镜(L3) 以及在光轴附近具有双凸形状的正的第四透镜(L4)。 在该结构中,第一透镜(L1)的屈光力大于第二透镜(L2),第三透镜​​(L3)和第四透镜(L4)中的每一个的折射力。