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公开(公告)号：US20210113063A1
公开(公告)日：2021-04-22
申请号：US16495182
申请日：2017-10-11
Applicant: Tamron Co., Ltd.
Inventor： Yasuhiko Obikane
Abstract: A variable magnification optical system capable of realizing a high-resolution observation image display system that can arbitrarily change an observation field of view without changing a working distance of an observation optical system while keeping the observation optical system small in size and an imaging apparatus including the variable magnification optical system.
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公开(公告)号：US10830994B2
公开(公告)日：2020-11-10
申请号：US16140762
申请日：2018-09-25
Applicant: TAMRON CO., LTD.
Inventor： Seigo Nakai , Yasuhiko Obikane
Abstract: An imaging lens according to the present invention includes a negative first lens, a meniscus-shaped negative second lens having a concave surface facing to an object side, a positive third lens, a positive fourth lens having a convex surface on the object side, a positive fifth lens, a negative sixth lens, and a positive seventh lens arranged in order from the object side. Furthermore, an imaging device according to the present invention includes the imaging lens.
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公开(公告)号：US11199682B2
公开(公告)日：2021-12-14
申请号：US16594643
申请日：2019-10-07
Applicant: TAMRON CO., LTD.
Inventor： Takayuki Noda , Yasuhiko Obikane
Abstract: An imaging optical system includes, in order from an object side, a first lens having negative refractive power, a second lens having positive refractive power, a third lens having positive refractive power, a fourth lens and a fifth lens, with the fourth lens and the fifth lens not cemented, in which a predetermined conditional expressions is satisfied.
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公开(公告)号：US10721398B2
公开(公告)日：2020-07-21
申请号：US15838787
申请日：2017-12-12
Applicant: Tamron Co., Ltd.
Inventor： Koutarou Joujiki , Yasuhiko Obikane
Abstract: An imaging optical system according to the present invention is the imaging optical system composed by arranging a front group, a stop, and a rear group in order from an object side, a lens arranged closest to the stop in the front group is a positive lens, a lens arranged closest to the stop in the rear group is also a positive lens, and specific conditional expressions are satisfied. In addition, an imaging apparatus according to the present invention includes the imaging optical system.
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公开(公告)号：US09507169B2
公开(公告)日：2016-11-29
申请号：US14284731
申请日：2014-05-22
Applicant: Tamron Co., Ltd.
Inventor： Yasuhiko Obikane
IPC: G02B27/64 , G02B15/14 , G02B15/22 , G02B15/173
CPC classification number: G02B27/646 , G02B15/14 , G02B15/173 , G02B15/22
Abstract: A zoom lens includes a first lens group having positive refracting power, a second lens group having negative refracting power, a third lens group having positive refracting power, a fourth lens group having negative refracting power and a fifth lens group having negative refracting power in order from an object side, in which the lens groups move in magnification change from a wide angle end to a telephoto end such that a gap between the first lens group and the second lens group increases and a gap between the second lens group and the third lens group decreases, a negative lens group disposed closer to an image focusing side than a diaphragm among all lens groups is set as a focusing lens group, and the focusing lens group moves toward the image focusing side at focusing from infinity to a close object, the zoom lens satisfies a conditional expression.
Abstract translation: 变焦透镜包括具有正折射率的第一透镜组，具有负折射力的第二透镜组，具有正折射率的第三透镜组，具有负折射光焦度的第四透镜组和具有负折射光焦度的第五透镜组，具有负折射力的第五透镜组 从物体侧起，透镜组从广角端到远摄端的放大变化，使得第一透镜组和第二透镜组之间的间隙增加，并且第二透镜组和第三透镜之间的间隙 组减小，将设置在所有透镜组中的比聚光侧更靠近图像聚焦侧的负透镜组设置为聚焦透镜组，并且聚焦透镜组在从无穷远到近距离物体聚焦时朝向图像聚焦侧移动， 变焦镜头满足条件表达式。
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Patent Agency Ranking
公开(公告)号：US20140347525A1
公开(公告)日：2014-11-27
申请号：US14284669
申请日：2014-05-22
Applicant: Tamron Co., Ltd.
Inventor： Yasuhiko Obikane
CPC classification number: G02B15/173
Abstract: A zoom lens includes a first lens group having positive refracting power, a second lens group having negative refracting power, a third lens group having positive refracting power, a fourth lens group having negative refracting power and a fifth lens group having negative refracting power in order from an object side, in which the lens groups move in magnification change from a wide angle end to a telephoto end such that a gap between the first lens group and the second lens group increases and a gap between the second lens group and the third lens group decreases, a negative lens group disposed closer to an image focusing side than a diaphragm among all lens groups is set as a focusing lens group, and the focusing lens group moves toward the image focusing side at focusing from infinity to a close object, and the fifth lens group includes at least a single lens block of a meniscus shape provided with a concave surface at an object side, the single lens block of the meniscus shape has a negative focal distance. The zoom lens and the fifth lens group each satisfies a respective conditional expression.
Abstract translation: 变焦透镜包括具有正折射率的第一透镜组，具有负折射力的第二透镜组，具有正折射率的第三透镜组，具有负折射光焦度的第四透镜组和具有负折射光焦度的第五透镜组，具有负折射力的第五透镜组 从物体侧起，透镜组从广角端到远摄端的放大变化，使得第一透镜组和第二透镜组之间的间隙增加，并且第二透镜组和第三透镜之间的间隙 将所有透镜组中靠近图像聚焦侧的膜片的负透镜组设置为聚焦透镜组，并且聚焦透镜组在从无穷远到近距离物体聚焦时朝向图像聚焦侧移动，并且 第五透镜组至少包括在物体侧设置有凹面的弯液面的单个透镜块，弯月面形状的单透镜块具有 负焦距。 变焦透镜和第五透镜组各自满足各自的条件表达式。
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公开(公告)号：US09880374B2
公开(公告)日：2018-01-30
申请号：US15235699
申请日：2016-08-12
Applicant: TAMRON CO., LTD.
Inventor： Yasuhiko Obikane
CPC classification number: G02B13/009 , G02B15/16 , G02B15/163 , G02B15/20 , G02B27/0025 , G02B27/646
Abstract: The present invention provides a zoom lens that is compact in general and has an F-number to implement brightness even in the telephoto end side, and an imaging apparatus equipped with the zoom lens. The zoom lens includes, in order from an object side: a first lens group having positive refractive power; a second lens group having positive refractive power; a third lens group having negative refractive power; and a fourth lens group having positive refractive power. At the time of zooming from the wide-angle end state to the telephoto end state, the third lens group moves so that the distance between the second lens group and the third lens group increases, and the distance between the third lens group and the fourth lens group decreases.
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公开(公告)号：US09715125B2
公开(公告)日：2017-07-25
申请号：US14284784
申请日：2014-05-22
Applicant: Tamron Co., Ltd.
Inventor： Yasuhiko Obikane
IPC: G02B27/64 , G02B15/14 , G02B15/22 , G02B15/173
CPC classification number: G02B27/646 , G02B15/14 , G02B15/173 , G02B15/22 , G02B27/64
Abstract: A zoom lens includes a first lens group having positive refracting power, a second lens group having negative refracting power, a third lens group having positive refracting power, a fourth lens group having negative refracting power and a fifth lens group having negative refracting power in order from an object side, in which the lens groups move in magnification change from a wide angle end to a telephoto end such that a gap between the first lens group and the second lens group increases and a gap between the second lens group and the third lens group decreases, a negative lens group disposed closer to an image focusing side than a diaphragm among all lens groups is set as a focusing lens group, and the focusing lens group moves toward the image focusing side at focusing from infinity to a close object, the zoom lens satisfies a conditional expression.
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公开(公告)号：US20140347546A1
公开(公告)日：2014-11-27
申请号：US14284784
申请日：2014-05-22
Applicant: Tamron Co., Ltd.
Inventor： Yasuhiko Obikane
CPC classification number: G02B27/646 , G02B15/14 , G02B15/173 , G02B15/22 , G02B27/64
Abstract: A zoom lens includes a first lens group having positive refracting power, a second lens group having negative refracting power, a third lens group having positive refracting power, a fourth lens group having negative refracting power and a fifth lens group having negative refracting power in order from an object side, in which the lens groups move in magnification change from a wide angle end to a telephoto end such that a gap between the first lens group and the second lens group increases and a gap between the second lens group and the third lens group decreases, a negative lens group disposed closer to an image focusing side than a diaphragm among all lens groups is set as a focusing lens group, and the focusing lens group moves toward the image focusing side at focusing from infinity to a close object, the zoom lens satisfies a conditional expression, and the focus lens group is composed of a single lens block of a meniscus shape provided with a concave surface at an image focusing side; and satisfies a different conditional expression.
Abstract translation: 变焦透镜包括具有正折射率的第一透镜组，具有负折射力的第二透镜组，具有正折射率的第三透镜组，具有负折射光焦度的第四透镜组和具有负折射光焦度的第五透镜组，具有负折射力的第五透镜组 从物体侧起，透镜组从广角端到远摄端的放大变化，使得第一透镜组和第二透镜组之间的间隙增加，并且第二透镜组和第三透镜之间的间隙 组减小，将设置在所有透镜组中的比聚光侧更靠近图像聚焦侧的负透镜组设置为聚焦透镜组，并且聚焦透镜组在从无穷远到近距离物体聚焦时朝向图像聚焦侧移动， 变焦透镜满足条件表达式，并且聚焦透镜组由在图像聚焦处设置有凹面的弯液面形状的单个透镜块组成 侧面 并满足不同的条件表达式。
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公开(公告)号：US20140049845A1
公开(公告)日：2014-02-20
申请号：US14063691
申请日：2013-10-25
Applicant: TAMRON CO., LTD.
Inventor： Nobuyuki ADACHI , Yasuhiko Obikane , Takahiko Sakai
IPC: G02B13/00
CPC classification number: G02B13/0015 , G02B9/12 , G02B9/62 , G02B9/64 , G02B13/00
Abstract: A fixed focus lens comprising, sequentially from an object side, a first lens group having a positive refractive power; a second lens group having a negative refractive power; and a third lens group having a positive refractive power. The first lens group includes an aperture stop. The second lens group is configured by a single lens element. During focusing, the second lens group moves along an optical axis and the first lens group and the third lens group are fixed with respect to an imaging plane.
Abstract translation: 一种固定聚焦透镜，其从物体侧依次具有正屈光力的第一透镜组; 具有负屈光力的第二透镜组; 以及具有正屈光力的第三透镜组。 第一透镜组包括孔径光阑。 第二透镜组由单个透镜元件构成。 在聚焦期间，第二透镜组沿光轴移动，第一透镜组和第三透镜组相对于成像平面固定。
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