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公开(公告)号：US20210033835A1
公开(公告)日：2021-02-04
申请号：US16931022
申请日：2020-07-16
发明人： Makoto Nakahara
摘要： A zoom lens includes, 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. During zooming, a distance between adjacent lens units of the first, second and plurality of lens units changes. The rear unit includes an aperture stop and a negative lens unit disposed closest to an object among at least one lens unit having a negative refractive power on the image side of the aperture stop. The negative lens unit includes a positive lens. A predetermined conditions are satisfied.
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公开(公告)号：US09500842B2
公开(公告)日：2016-11-22
申请号：US14867512
申请日：2015-09-28
发明人： Makoto Nakahara
IPC分类号： G02B9/04 , G02B15/20 , G02B15/177 , G02B27/00
CPC分类号： G02B15/20 , G02B15/177 , G02B27/0025
摘要： The maximum amount of movement DF1 of a first focus lens section during focusing, the maximum amount of movement DF2 of a second focus lens section during focusing, the focal length fLP of a lens section LP, the focal length fF2 of the second focus lens section, the focal length fLRw of a rear unit at the wide angle end, and the focal length fw of the entire system at the wide angle end are appropriately configured.
摘要翻译： 聚焦期间第一聚焦透镜部分的最大移动量DF1，聚焦期间第二聚焦透镜部分的最大移动量DF2，透镜部分LP的焦距fLP，第二聚焦透镜部分的焦距f F2 广角端的后方单元的焦距fLRw和广角端的整个系统的焦距fw被适当地构成。
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公开(公告)号：US20150077594A1
公开(公告)日：2015-03-19
申请号：US14451498
申请日：2014-08-05
发明人： Makoto Nakahara
CPC分类号： H04N5/23287 , G02B15/173 , G02B27/646 , G03B2205/0015 , H04N5/23296
摘要： The zoom lens includes: a positive first lens unit; a positive second lens unit disposed in an image side of the first lens unit, at least a part of the second lens unit constituting an image stabilizing lens unit configured to move with a component perpendicular to an optical axis; the zoom lens being configured to change an interval between neighboring lens units during zooming; and an aperture stop arranged in the image side of the first lens unit, wherein a focal length of the first lens unit, a focal length of the image stabilizing lens unit, a focal length at a wide angle end of an optical system Lr arranged on the image side of the image stabilizing lens unit, and a focal length of an entire system at the wide angle end are appropriately set.
摘要翻译： 变焦镜头包括：正的第一透镜单元; 设置在所述第一透镜单元的像侧的正的第二透镜单元，构成为以垂直于光轴的分量移动的图像稳定化透镜单元的至少一部分; 变焦镜头被配置为在变焦期间改变相邻镜头单元之间的间隔; 以及孔径光阑，布置在第一透镜单元的像侧，其中第一透镜单元的焦距，图像稳定透镜单元的焦距，光学系统Lr的广角端处的焦距被布置在 图像稳定透镜单元的像侧以及广角端的整个系统的焦距被适当地设定。
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公开(公告)号：US11150466B2
公开(公告)日：2021-10-19
申请号：US16192646
申请日：2018-11-15
IPC分类号： G02B27/00
摘要： An optical system includes a first lens unit having positive refractive power, a second lens unit, and a third lens unit having negative refractive power arranged in order from an object side to an image side. The second lens unit moves in focusing, thereby changing a distance between adjacent lens units. The first lens unit includes a positive lens, and the third lens unit includes a negative lens. A focal length of the positive lens, a focal length of the negative lens, a focal length of the third lens unit, and a back focus of the optical system are appropriately set.
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公开(公告)号：US11137583B2
公开(公告)日：2021-10-05
申请号：US16418242
申请日：2019-05-21
发明人： Makoto Nakahara
摘要： A plurality of lens units of a zoom lens according to an aspect of the embodiments includes a first lens unit having a negative refractive power, and a rear lens group which includes one or more lens units and has a positive refractive power as a whole. The first lens unit consists of a first negative lens, a second negative lens, and a positive lens which are disposed in order from an object side to an image side. A specific gravity of the first negative lens, a focal length of the second negative lens, and a focal length of the first lens unit are appropriately determined.
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公开(公告)号：US11042012B2
公开(公告)日：2021-06-22
申请号：US16178364
申请日：2018-11-01
摘要： An optical system includes a first lens unit B1 having a positive refractive power, a second lens unit B2, and a third lens unit B3 disposed in order from an object side to an image side. The second lens unit B2 moves in focusing so that an interval between adjacent lens units among the first, second, and third lens units changes. The first lens unit B1 includes a positive lens G1p disposed closest to the object side and a negative lens G1n being a closest negative lens with respect to the object side. The optical system satisfies a predetermined condition.
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公开(公告)号：US10935755B2
公开(公告)日：2021-03-02
申请号：US16051787
申请日：2018-08-01
发明人： Shinichiro Saito , Makoto Nakahara
摘要： Provided is an optical system 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 configured to move during focusing; and a third lens unit. An interval between each pair of adjacent lens units is changed during focusing. The optical system includes an aperture stop. The first lens unit includes at least three positive lenses including a positive lens (G1P) arranged closest to the object side. A distance LD on an optical axis from a lens surface closest to the object side of the optical system to an image plane, a focal length “f” of the optical system, a refractive index ndG1P of a material of the positive lens (G1P), and an Abbe number νdG1P of the material of the positive lens (G1P) are each appropriately set.
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公开(公告)号：US20190162932A1
公开(公告)日：2019-05-30
申请号：US16192646
申请日：2018-11-15
摘要： An optical system includes a first lens unit having positive refractive power, a second lens unit, and a third lens unit having negative refractive power arranged in order from an object side to an image side. The second lens unit moves in focusing, thereby changing a distance between adjacent lens units. The first lens unit includes a positive lens, and the third lens unit includes a negative lens. A focal length of the positive lens, a focal length of the negative lens, a focal length of the third lens unit, and a back focus of the optical system are appropriately set.
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公开(公告)号：US20160313543A1
公开(公告)日：2016-10-27
申请号：US15132989
申请日：2016-04-19
发明人： Makoto Nakahara
IPC分类号： G02B15/22
CPC分类号： G02B15/22 , G02B9/10 , G02B13/04 , G02B13/18 , G02B13/24 , G02B15/00 , G02B15/08 , G02B15/161 , G02B15/24 , G02B15/26
摘要： An optical system includes, in order from an object side toward an image side, a first lens unit having positive refractive power, and a second lens unit having negative refractive power. A distance between consecutive ones of the lens units changes when focusing is performed. The first lens unit is stationary during focusing. The second lens unit is moved toward the image side when focus is changed from an object at infinity to an object at a short distance. Lateral magnification β2 of the second lens unit when focusing on the object at infinity, focal length f1 of the first lens unit, and focal length f2 of the second lens unit are set appropriately to satisfy predetermined mathematical conditions.
摘要翻译： 光学系统从物体侧朝向像侧依次包括具有正屈光力的第一透镜单元和具有负屈光力的第二透镜单元。 当进行聚焦时，连续的透镜单元之间的距离改变。 第一个镜头单元在聚焦期间是静止的。 当焦点从无限远的物体变为距离较短的物体时，第二透镜单元朝向像侧移动。 当聚焦在无限远物体上时第二透镜单元的横向放大率β2，第一透镜单元的焦距f1和第二透镜单元的焦距f2被适当地设置以满足预定的数学条件。
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公开(公告)号：US09219864B2
公开(公告)日：2015-12-22
申请号：US14451498
申请日：2014-08-05
发明人： Makoto Nakahara
IPC分类号： H04N5/232 , H04N5/228 , G02B27/64 , G02B15/173
CPC分类号： H04N5/23287 , G02B15/173 , G02B27/646 , G03B2205/0015 , H04N5/23296
摘要： The zoom lens includes: a positive first lens unit; a positive second lens unit disposed in an image side of the first lens unit, at least a part of the second lens unit constituting an image stabilizing lens unit configured to move with a component perpendicular to an optical axis; the zoom lens being configured to change an interval between neighboring lens units during zooming; and an aperture stop arranged in the image side of the first lens unit, wherein a focal length of the first lens unit, a focal length of the image stabilizing lens unit, a focal length at a wide angle end of an optical system Lr arranged on the image side of the image stabilizing lens unit, and a focal length of an entire system at the wide angle end are appropriately set.
摘要翻译： 变焦镜头包括：正的第一透镜单元; 设置在所述第一透镜单元的像侧的正的第二透镜单元，构成为以垂直于光轴的分量移动的图像稳定化透镜单元的至少一部分; 变焦镜头被配置为在变焦期间改变相邻镜头单元之间的间隔; 以及孔径光阑，布置在第一透镜单元的像侧，其中第一透镜单元的焦距，图像稳定透镜单元的焦距，光学系统Lr的广角端处的焦距被布置在 图像稳定透镜单元的像侧以及广角端的整个系统的焦距被适当地设定。
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