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公开(公告)号：US11022783B2
公开(公告)日：2021-06-01
申请号：US16291469
申请日：2019-03-04
发明人： Takahiro Hatada
IPC分类号： G02B15/16
摘要： Provided is a zoom lens including a plurality of lens units, which consist of, in order from an object side to an image side: a positive first lens unit; a negative second lens unit; and a rear lens group including a plurality of lens units and having a positive refractive power as a whole, the first lens unit including a negative lens G1n arranged closest to the object side, and a plurality of positive lenses arranged on the image side of the negative lens, and the rear lens group includes a positive lens Grp. A lens unit arranged closest to the image side in the rear lens group includes the positive lens Grp. At this time, an Abbe number of the negative lens G1n, a refractive index of the positive lens Grp, and back focuses at a wide-angle end and a telephoto end, respectively, are appropriately set.
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2.发明授权公开(公告)号：US10353185B2
公开(公告)日：2019-07-16
申请号：US15707102
申请日：2017-09-18
IPC分类号： G02B15/163 , G02B9/62 , C03C3/097 , G02B27/00
摘要： A conversion lens having a negative refractive power includes a positive lens GP. The positive lens GP satisfies all the following conditional expressions: 30≤νd≤40, 1.225≤[nd−(14.387/νd)]≤1.276, and 0.4300≤[θgF−(2.9795/νd)]≤0.5010, where νd is an Abbe number of the positive lens GP, θgF is a partial dispersion ratio of the positive lens GP for g-line and F-line, and nd is a refractive index of the positive lens GP for d-line.
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公开(公告)号：US10247926B2
公开(公告)日：2019-04-02
申请号：US15706986
申请日：2017-09-18
IPC分类号： G02B13/18 , G02B15/15 , G02B15/177 , H04N5/225
摘要： An optical system includes an optical element. When the optical element is disposed on a magnification side with respect to an intersection point between an optical axis and a chief paraxial ray, the optical element is a positive lens. When the optical element is disposed on a reduction side with respect to the intersection point, the optical element is a negative lens. The optical element satisfies all of the following conditional expressions: 30≤νd≤40 1.225≤[nd−(14.387/νd)]≤1.276 0.4300≤[θgF−(2.9795/νd)]≤0.5010 where νd is Abbe number of the optical element, θgF is a partial dispersion ratio of the optical element for g-line and F-line, and nd is a refractive index of the optical element for d-line.
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公开(公告)号：US20180252895A1
公开(公告)日：2018-09-06
申请号：US15905449
申请日：2018-02-26
发明人： Takahiro Hatada
CPC分类号： G02B9/62 , G02B9/64 , G02B15/14 , G02B15/173
摘要： A zoom lens includes a first lens unit L1 having positive refractive power, a second lens unit L2 having negative refractive power, and a rear lens group LB including a plurality of lens units and having positive refractive power. The rear lens group LB includes a lens unit LF configured to move during focusing and having negative refractive power, a lens unit LN disposed on the image side of the lens unit LF and having negative refractive power, and a lens unit LP disposed on the image side of the lens unit LN and having the largest positive refractive power among the lens units having positive refractive power. The lens units LP and LN move to the object side in a predetermined locus during zooming from the wide-angle end to the telephoto end, and the lens units LP and LF satisfy a predetermined conditional expression.
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公开(公告)号：US20180095256A1
公开(公告)日：2018-04-05
申请号：US15707221
申请日：2017-09-18
IPC分类号： G02B15/163 , G02B9/64 , C03C3/064
CPC分类号： G02B15/163 , C03C3/064 , G02B9/64 , G02B13/18 , G02B15/177
摘要： An optical system includes a negative lens satisfying the following conditional expressions: 30≦νd≦40, 1.225≦[nd−(14.387/νd)]≦1.276, and 0.4300≦[θgF−(2.9795/νd)]≦0.5010, where νd is an Abbe number of the negative lens, θgF is a partial dispersion ratio of the negative lens at a g-line and an F-line, and nd is a refractive index of the negative lens at a d-line.
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公开(公告)号：US20180095242A1
公开(公告)日：2018-04-05
申请号：US15707203
申请日：2017-09-18
CPC分类号： G02B9/64 , G02B7/36 , G02B9/12 , G02B9/34 , G02B13/004 , G02B15/163 , G02B15/173 , G02B27/0062
摘要： An optical system used in an imaging apparatus includes an optical element. In a case where the optical element is disposed on a magnification side with respect to an intersection point of an optical axis and a chief paraxial ray, the optical element is a negative lens, and in a case where the optical element is disposed on a reduction side with respect to the intersection point, the optical element is a positive lens. The optical element is configured to satisfy all of the following conditional expressions: 30≦νd≦40 1.225≦[nd−(14.387/νd)]≦1.276 0.4300≦[θgF−(2.9795/νd)]≦0.5010, where νd represents an Abbe number of the optical element, θgF is a partial dispersion ratio of the optical element for g-line and F-line, and nd is a refractive index of the optical element for d-line.
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公开(公告)号：US20240201470A1
公开(公告)日：2024-06-20
申请号：US18592657
申请日：2024-03-01
发明人： Takahiro Hatada
CPC分类号： G02B9/12 , G02B27/0025
摘要： An optical system with a fixed focal length includes a front lens unit closest to an object, a rear lens unit having a negative refractive power closest to an image plane, and a middle unit having a positive refractive power as a whole, including one or more lens units, and disposed between the front lens unit and the rear lens unit. A distance between adjacent lens units changes during focusing. The rear lens unit includes two or more positive lenses. A predetermined condition is satisfied.
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公开(公告)号：US20220244508A1
公开(公告)日：2022-08-04
申请号：US17584541
申请日：2022-01-26
发明人： Takahiro Hatada
IPC分类号： G02B15/14 , H04N5/232 , G02B15/177 , G02B27/64
摘要： A zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power, and a rear unit having a positive refractive power as a whole. A distance between the first lens unit and the rear unit is changed during zooming. The rear unit includes a subunit that is moved in a direction having a component of a direction orthogonal to an optical axis during image stabilization. The first lens unit includes, in order from the object side to the image side, three or more negative lenses. A predetermined condition is satisfied.
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公开(公告)号：US10895714B2
公开(公告)日：2021-01-19
申请号：US15707203
申请日：2017-09-18
摘要： An optical system used in an imaging apparatus includes an optical element. In a case where the optical element is disposed on a magnification side with respect to an intersection point of an optical axis and a chief paraxial ray, the optical element is a negative lens, and in a case where the optical element is disposed on a reduction side with respect to the intersection point, the optical element is a positive lens. The optical element is configured to satisfy all of the following conditional expressions: 30≤νd≤40 1.225≤[nd−(14.387/νd)]≤1.276 0.4300≤[θgF−(2.9795/νd)]≤0.5010, where νd represents an Abbe number of the optical element, θgF is a partial dispersion ratio of the optical element for g-line and F-line, and nd is a refractive index of the optical element for d-line.
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公开(公告)号：US20160062096A1
公开(公告)日：2016-03-03
申请号：US14829011
申请日：2015-08-18
发明人： Takahiro Hatada
CPC分类号： H04N5/23212 , G02B15/14 , G02B15/173 , G02B27/0025
摘要： Provided is a zoom lens, including, in order from an object side to an image side: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; and a rear unit including a plurality of lens units and having a positive refractive power as a whole, in which an interval between adjacent lens units is changed during zooming. The rear unit includes a focus unit having a positive refractive power, which is configured to move during focusing. An optical system arranged on the image side of the focus unit has a negative refractive power at a telephoto end. A focal length (ft) of the zoom lens at the telephoto end and a combined focal length (fpt) of an optical system arranged on the object side of the focus unit are each appropriately set.
摘要翻译： 本发明提供一种变焦透镜，其包括从物体侧到像侧的顺序：具有正折射光焦度的第一透镜单元; 具有负屈光力的第二透镜单元; 以及包括多个透镜单元并且整体具有正折射力的后单元，其中在变焦期间相邻透镜单元之间的间隔被改变。 后部单元包括具有正折射力的聚焦单元，其被配置为在聚焦期间移动。 配置在聚焦单元的像侧的光学系统在望远端具有负折光力。 在远摄端的变焦镜头的焦距（ft）和布置在聚焦单元的物体侧的光学系统的组合焦距（fpt）均被适当地设定。
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