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公开(公告)号：US12158568B2
公开(公告)日：2024-12-03
申请号：US17735677
申请日：2022-05-03
Applicant: TAMRON CO., LTD.
Inventor： Hisayuki Yamanaka
Abstract: Provided are: a zoom lens including, in order from an object side, a first lens group having positive refractive power, a second lens group having negative refractive power, an Intermediate group having one or more lens groups and having positive refractive power as a whole, a lens group having negative refractive power, and a rear group having one or more lens groups, wherein the intermediate group includes at least two lens surfaces each of which is a cemented surface and is a diverging surface, a space between adjacent lens groups changes in zooming, the lens group moves on an optical axis in focusing, and the zoom lens satisfies the predetermined conditional expression; and an imaging apparatus including the zoom lens.
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公开(公告)号：US11143852B2
公开(公告)日：2021-10-12
申请号：US16555273
申请日：2019-08-29
Applicant: TAMRON CO., LTD.
Inventor： Hisayuki Yamanaka
IPC: G02B15/14 , G02B15/173 , G02B13/18 , G02B13/00 , G02B15/20 , G02B27/00 , G02B13/06 , H04N5/232 , H04N5/335 , G02B7/10 , G02B5/00
Abstract: To attain the above-described objective, a zoom lens according to the present invention includes sequentially from an object side, a front group which includes at least three lens groups and has positive refractive power as a whole, and a lens group disposed on an image side of the front group, a magnification is changed by a change of a distance on an optical axis between adjacent lens groups, the lens group includes sequentially from an image side, a lens component, a lens component, and a lens component, the lens group is moved to an object side at a time of changing a magnification from a wide-angle end to a telephoto end, focusing is obtained by movement of a part of lens groups in the front group along an optical axis, and a predetermined condition expression is satisfied.
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公开(公告)号：US20190302432A1
公开(公告)日：2019-10-03
申请号：US16222268
申请日：2018-12-17
Applicant: Tamron Co., Ltd.
Inventor： Yoshito Iwasawa , Hisayuki Yamanaka , Keisuke Okada , Junichi Yamazoe
IPC: G02B15/177 , G02B27/64 , G02B13/18 , G02B13/02
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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公开(公告)号：US09645353B2
公开(公告)日：2017-05-09
申请号：US15050852
申请日：2016-02-23
Applicant: Tamron Co., Ltd.
Inventor： Hisayuki Yamanaka , Keisuke Okada , Takahiko Sakai , Yoshito Iwasawa
CPC classification number: G02B9/64 , G02B13/005 , G02B13/006 , G02B27/0025 , G02B27/646
Abstract: An optical system of the present invention includes, in order from an object side: a first lens group G1; a second lens group G2 having positive refractive power; and a third lens group G3 having positive refractive power, wherein the first lens group G1 and the third lens group G3 are fixed in an optical axis direction while the second lens group G2 is moved in an optical axis direction to focus on from an object at infinity to an object at a finite distance, and specified conditions is satisfied.
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公开(公告)号：US20130201565A1
公开(公告)日：2013-08-08
申请号：US13760973
申请日：2013-02-06
Applicant: Tamron Co., Ltd.
Inventor： Hisayuki Yamanaka
IPC: G02B15/24
Abstract: The present invention is directed to providing a large aperture telephotographing zoom lens that employs an inner-focusing system to enable quick focusing and avoid a great aberration when the zoom lens renders the close object in focus. The zoom lens comprises at least five groups of lens pieces arranged in series, namely, the foremost or first lens group of positive refractivity positioned the closest to the object, the succeeding second lens group of negative refractivity, the third lens group of negative refractivity, the fourth lens group of positive refractivity, and the rearmost or fifth lens group of positive refractivity. During varying the magnification for zooming in a transition from the wide-angle end to the telephoto end, all the lens pieces of the second, third, and fourth lens groups are moved toward the image plane, and the third lens group alone is displaced for focusing.
Abstract translation: 本发明旨在提供一种大孔径长焦摄影变焦镜头，其采用内部聚焦系统来实现快速聚焦，并且当变焦镜头使焦点对准物体时避免大的像差。 变焦透镜包括至少五组串联布置的透镜片，即位于最接近物体的正折射率的最前面或第一透镜组，负折射率的后续第二透镜组，负折射率的第三透镜组， 正折射率的第四透镜组和正折射率的最后或第五透镜组。 在变化用于放大从广角端到望远端的转变的放大倍数时，第二，第三和第四透镜组的所有透镜片朝向图像平面移动，并且仅第三透镜组移位， 聚焦。
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Patent Agency Ranking
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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公开(公告)号：US20160252706A1
公开(公告)日：2016-09-01
申请号：US15050852
申请日：2016-02-23
Applicant: Tamron Co., Ltd.
Inventor： Hisayuki Yamanaka , Keisuke Okada , Takahiko Sakai , Yoshito Iwasawa
CPC classification number: G02B9/64 , G02B13/005 , G02B13/006 , G02B27/0025 , G02B27/646
Abstract: An optical system of the present invention includes, in order from an object side: a first lens group G1; a second lens group G2 having positive refractive power; and a third lens group G3 having positive refractive power, wherein the first lens group G1 and the third lens group G3 are fixed in an optical axis direction while the second lens group G2 is moved in an optical axis direction to focus on from an object at infinity to an object at a finite distance, and specified conditions is satisfied.
Abstract translation: 本发明的光学系统从物体侧起依次包括：第一透镜组G1; 具有正折射力的第二透镜组G2; 和具有正折光力的第三透镜组G3，其中第一透镜组G1和第三透镜组G3在光轴方向上固定，而第二透镜组G2沿光轴方向移动以从物体聚焦 无限远到有限距离的物体，并且满足指定的条件。
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公开(公告)号：US12158567B2
公开(公告)日：2024-12-03
申请号：US17739898
申请日：2022-05-09
Applicant: TAMRON CO., LTD.
Inventor： Hisayuki Yamanaka
Abstract: Provided are: a zoom lens including, in order from an object side, a positive first lens group, a negative second lens group, an intermediate group as a whole, a negative lens group, and a rear group, wherein the intermediate group includes, in order from an object side, a first positive lens subgroup including one or two positive lenses, a first negative lens subgroup including only one cemented lens, a second negative lens subgroup including a negative lens with a concave surface facing an object, and a second positive lens subgroup including one or two positive lenses, the cemented lens constituting the first negative lens subgroup has at least one cemented surface with a convex surface facing an object, and a lens, closest to an image, of the second positive lens subgroup is a positive lens; and an imaging apparatus including the zoom lens.
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公开(公告)号：US11789248B2
公开(公告)日：2023-10-17
申请号：US17476111
申请日：2021-09-15
Applicant: TAMRON CO., LTD.
Inventor： Hisayuki Yamanaka
CPC classification number: G02B15/145121 , G02B15/22
Abstract: Provided are a zoom lens comprising, in order from an object side, a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, a fourth lens group having negative refractive power, and a fifth lens group having positive refractive power, in which distances between the respective lens groups are changed to change magnification, the first lens group consists of one single lens having spherical surfaces on both sides, the single lens is a positive meniscus lens having a convex shape toward the object side, at a time of magnification change from a wide-angle end to a telephoto end, the second lens group moves along a path convex toward the image side, and a predetermined conditional expression is satisfied, and an imaging apparatus including the zoom lens.
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公开(公告)号：US09829685B2
公开(公告)日：2017-11-28
申请号：US15044478
申请日：2016-02-16
Applicant: Tamron Co., Ltd.
Inventor： Hisayuki Yamanaka , Keisuke Okada , Yoshito Iwasawa
IPC: G02B13/02 , G02B15/14 , G02B17/00 , G02B9/12 , G02B9/14 , G02B7/02 , G02B9/64 , G02B13/00 , G02B27/00
CPC classification number: G02B13/02 , G02B9/64 , G02B13/006 , G02B27/0025
Abstract: The optical system of the present invention includes, in order from an object side: 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, wherein the first lens group G1 and the third lens group G3 are fixed in an optical axis direction, while the second lens group G2 is moved in the optical axis direction to focus on from an object at infinity to an object at a finite distance, the third lens group G3 includes, in order from the object side: an object-side group G3a; an aperture stop S; and an image-side group G3b, and a specified condition is satisfied.
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