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公开(公告)号：US09557546B2
公开(公告)日：2017-01-31
申请号：US14984286
申请日：2015-12-30
Applicant: Tamron Co., Ltd.
Inventor： Yoshito Iwasawa
CPC classification number: G02B15/20 , G02B7/08 , G02B7/10 , G02B15/17 , G02B15/173
Abstract: The zoom lens including an object side lens group at least including, in order from an object side: a first lens group G1 having positive refractive power; and a second lens group G2 having negative refractive power; and an image focusing side lens group including, in order from the object side: a negative lens group A having negative refractive power; and a negative lens group B arranged by facing the negative lens group A across an air distance, having negative refractive power. In the zoom lens, focusing from infinity to a close object is achieved by moving just the negative lens group A toward an image focusing side to satisfy a conditional expression.
Abstract translation: 包括物体侧透镜组的变焦透镜至少包括从物体侧开始的具有正折射光焦度的第一透镜组G1; 和具有负屈光力的第二透镜组G2; 以及图像聚焦侧透镜组，其包括从物体侧起依次具有负折射力的负透镜组A; 以及负透镜组B，其通过面对负透镜组A而跨越具有负屈光力的空气距离。 在变焦镜头中，通过将负透镜组A朝向图像聚焦侧移动以满足条件表达式来实现从无限远到近距离对象的对焦。
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公开(公告)号：US09329370B2
公开(公告)日：2016-05-03
申请号：US14409624
申请日：2013-06-24
Applicant: TAMRON CO., LTD
Inventor： Yoshito Iwasawa
IPC: G02B15/14 , G02B15/16 , G02B15/177 , G02B13/00 , H04N5/232
CPC classification number: G02B15/16 , G02B13/0015 , G02B13/009 , G02B15/177 , H04N5/23296
Abstract: A zoom lens exhibits a reduction in size, increased magnification, a reduction in variation of angle of view during zooming, and an increased focusing speed, said zoom lens being suitable for an imaging apparatus using a solid-state imaging device such as an interchangeable lens, a digital still camera, a digital video camera, or the like. The zoom lens has, in the lens system, at least: a first negative lens group having negative refractive power; a second negative lens group disposed further towards the image side than the first negative lens group, and which has negative refractive power; and a lens group (A) disposed so as to be adjacent to the image side of the second negative lens group. In the zoom lens, focusing from an infinite distance to a near object is performed by moving only the second negative lens group towards the image side, and prescribed conditions are satisfied.
Abstract translation: 变焦镜头的尺寸减小，倍率增加，变焦期间视角变化的减小以及聚焦速度的提高，所述变焦镜头适用于使用诸如可互换镜头的固态成像装置的成像装置 数码相机，数码摄像机等。 变焦透镜在透镜系统中至少具有：具有负屈光力的第一负透镜组; 第二负透镜组，比第一负透镜组进一步朝向像侧设置，并具有负折射力; 以及与第二负透镜组的像侧相邻配置的透镜组（A）。 在变焦透镜中，通过仅使第二负透镜组朝向像侧移动而执行从无限距离到近物体的聚焦，并且满足规定的条件。
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公开(公告)号：US20150168696A1
公开(公告)日：2015-06-18
申请号：US14565980
申请日：2014-12-10
Applicant: Tamron Co., Ltd.
Inventor： Yoshito Iwasawa , Dayong Li
CPC classification number: G02B15/14 , G02B15/173 , H04N5/23296
Abstract: An object of the present invention is to provide a low-cost, miniature, wide-angle high-zoom-ratio zoom lens that has high imaging performance, and an imaging apparatus equipped with the zoom lens. To achieve the object, a zoom lens including a first lens group having positive refracting power, a second lens group having negative refracting power and a third lens group having positive refracting power in order from an object side in which a lens group P having positive refracting power is arranged closer to an image plane side than the third lens group.
Abstract translation: 本发明的目的是提供具有高成像性能的低成本，微型的广角高变焦倍率变焦镜头和配备有变焦镜头的摄像装置。 为了实现该目的，包括具有正折射率的第一透镜组的变焦透镜，具有负折射率的第二透镜组和具有正折射率的第三透镜组，从具有正折射率的透镜组P的物体侧开始 功率比第三透镜组更靠近图像平面侧。
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公开(公告)号：US20140347524A1
公开(公告)日：2014-11-27
申请号：US14284630
申请日：2014-05-22
Applicant: Tamron Co., Ltd.
Inventor： Yoshito Iwasawa
CPC classification number: G02B15/20 , G02B7/08 , G02B7/10 , G02B15/17 , G02B15/173
Abstract: The zoom lens is composed of: an object side lens group at least including, in order from an object side: a first lens group G1 having positive refractive power; and a second lens group G2 having negative refractive power; and an image focusing side lens group including, in order from the object side: a negative lens group A having negative refractive power; and a negative lens group B arranged by facing the negative lens group A across an air distance, having negative refractive power. In the zoom lens, focusing from infinity to a close object is achieved by moving just the negative lens group A toward an image focusing side to satisfy a conditional expression below: [Expression 1] −1.80
Abstract translation: 变焦透镜由以下部分构成：物体侧透镜组，从物体侧开始依次具有：具有正折射光焦度的第一透镜组G1; 和具有负屈光力的第二透镜组G2; 以及图像聚焦侧透镜组，其包括从物体侧起依次具有负折射力的负透镜组A; 以及负透镜组B，其通过面对负透镜组A而跨越具有负屈光力的空气距离。 在变焦透镜中，通过将负透镜组A朝向图像聚焦侧移动以满足下面的条件表达式来实现从无穷远到闭合对象的对焦：[表达式1] -1.80 <＆bgr 2t <-0.94（1） （1＆bgr; At2）×＆bgr; Bt2 <-4.5（2）其中“＆bgr; 2t”是无限远聚焦中第二透镜组的远摄端的横向放大倍数，“＆bgr; At”是长焦时的横向放大倍率 在无限远聚焦中，负透镜组A的端部，“＆bgr; Bt”是负透镜组B的远摄端在无限远聚焦中的横向放大率。
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公开(公告)号：US10935772B2
公开(公告)日：2021-03-02
申请号：US16222268
申请日：2018-12-17
Applicant: Tamron Co., Ltd.
Inventor： Yoshito Iwasawa , Hisayuki Yamanaka , Keisuke Okada , Junichi Yamazoe
IPC: G02B15/17 , G02B15/177 , G02B13/18 , G02B27/64
Abstract: A zoom lens including a front group and a rear group, wherein a lens group arranged on an object side of a widest air interval at a wide-angle end is defined as the front group and a lens group arranged on an image side of the widest air interval at the wide-angle end is defined as the rear group, the front group having a negative refractive power, the rear group having a positive refractive power. Changing focal length from the wide-angle end to the telephoto end is performed by changing an air interval between the lens groups.
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Patent Agency Ranking
公开(公告)号：US10545321B2
公开(公告)日：2020-01-28
申请号：US15364590
申请日：2016-11-30
Applicant: TAMRON CO., LTD.
Inventor： Yoshito Iwasawa , Jun Takahashi
IPC: G02B15/173 , G02B27/64 , G02B5/00 , G02B27/00
Abstract: A zoom lens has in order from the object side, at least a foremost, first lens group having positive refractive power, a succeeding, second lens group having negative refractive power, a third lens group having positive refractive power, and a rearmost lens group having negative refractive power. The zoom lens meets requirements as defined in formulas regarding a displacement of the first lens group, a focal length of the zoom lens at the wide-angle end, a focal length of the zoom lens at the telephoto end, a focal length of the first lens group, and a focal length of the third lens group.
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公开(公告)号：US20190339501A1
公开(公告)日：2019-11-07
申请号：US16092108
申请日：2016-06-30
Applicant: Tamron Co., Ltd.
Inventor： Yoshito Iwasawa
Abstract: A small observation optical system having a high resolution, an observation imaging device that includes the observation optical system, an observation imaging system, an image forming lens system, and a method of adjusting the observation optical system. The observation optical system includes an objective lens system G1 and an image forming lens system G2, sequentially from the observation object side, and the image forming lens system G2 forms an observation object image forms through the objective lens system G1, on an image plane IP of an image sensor, and satisfies predetermined condition.
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公开(公告)号：US10359611B2
公开(公告)日：2019-07-23
申请号：US15364588
申请日：2016-11-30
Applicant: TAMRON CO., LTD.
Inventor： Yoshito Iwasawa , Jun Takahashi
IPC: G02B15/173 , G02B5/00 , G02B27/00 , G02B27/64
Abstract: A zoom lens has in order from the object side, at least a foremost, first lens group having positive refractive power, a succeeding, second lens group having negative refractive power, a third lens group having positive refractive power, and a rearmost lens group having negative refractive power. The zoom lens meets requirements as defined in formulas regarding a displacement of the first lens group, a focal length of the zoom lens at the wide-angle end, a focal length of the zoom lens at the telephoto end, a focal length of the first lens group, and a focal length of the third lens group.
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公开(公告)号：US10191259B2
公开(公告)日：2019-01-29
申请号：US15416532
申请日：2017-01-26
Applicant: TAMRON CO., LTD.
Inventor： Yoshito Iwasawa , Jun Takahashi
IPC: G02B15/173 , G02B15/14 , G02B15/16
Abstract: The zoom lens comprises five or more groups of lens pieces, namely, the foremost or first lens group of positive refractive power located the closest to an object, the succeeding second lens group of negative refractive power, the third lens group of positive refractive power, the fourth lens group of positive refractive power, and the fifth lens group all arranged in this order, and if any, the rearmost lens group(s) closer to the imaging plane than the fifth lens group. The zoom lens meets requirements as defined in the conditional expression regarding a combined magnification of the fifth lens group and, if any, the rearmost lens group(s) closer to the imaging plane than the fifth lens group while the zoom lens is taking a telephoto position.
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公开(公告)号：US20180284407A1
公开(公告)日：2018-10-04
申请号：US15844881
申请日：2017-12-18
Applicant: Tamron Co., Ltd.
Inventor： Yoshito Iwasawa , Kazuya Watanabe , Wataru Kusaka
IPC: G02B15/173 , G02B13/02 , G02B27/00
Abstract: The present invention provides a zoom lens which is the zoom lens that includes a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, and a third lens group G3 having positive refractive power in order from an object side, and changes focal length by changing an air interval between the respective lens groups, the zoom lens including a focus group F constituted from one lens in or after the third lens group G3, moving only the focus group F along an optical axis direction when focusing from an infinity object to a proximity object, and satisfying specific conditional expressions, and an imaging apparatus including the zoom lens.
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