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1. 发明授权

US11300763B2 Optical system and imaging apparatus 有权
公开(公告)号：US11300763B2
公开(公告)日：2022-04-12
申请号：US16984627
申请日：2020-08-04
申请人： CANON KABUSHIKI KAISHA
发明人： Shunji Iwamoto
IPC分类号： G02B13/00 , G02B7/04
摘要： An optical system includes one or more positive lenses and one or more negative lenses. The first positive lens is a positive lens disposed closest to an object among the one or more positive lenses. The first negative lens is a negative lens that is disposed on an image side of the first positive lens and disposed closest to the object among the one or more negative lenses. At least one of an object side surface and an image side surface of the first positive lens is an aspherical surface. At this time, a relationship between a total lens length of the optical system L0, a focal length of the optical system L0, and a distance Dpn on an optical axis from the image side surface of the first positive lens to an object side surface of the first negative lens is defined.

2. 发明授权

US11131829B2 Zoom lens and image pickup apparatus 有权
公开(公告)号：US11131829B2
公开(公告)日：2021-09-28
申请号：US16019593
申请日：2018-06-27
申请人： CANON KABUSHIKI KAISHA
发明人： Shunji Iwamoto
IPC分类号： G02B15/14 , G02B7/04 , G02B13/06 , G02B9/64 , G02B15/177 , G02B13/22
摘要： The zoom lens according to the present invention includes a plurality of lens units consisting of front and rear groups having negative and positive refractive powers at a wide angle end (WAE), respectively. An interval between front and rear groups on an optical axis is longest among all intervals between adjacent ones of plurality of lens units at WAE. The rear group is disposed at an image side of front group and includes a plurality of lens units including a negative lens unit LN (LULN) disposed closest to image side. The LULN includes negative and positive lenses disposed closest to object and image sides in LULN, respectively. A focal length of LULN, a focal length of zoom lens at WAE, a distance on optical axis between a lens surface closest to object side and that closest to image side in LULN, and a back focus at WAE are appropriately set.

3. 发明授权

US10802249B2 Zoom lens and image pickup apparatus including same 有权
公开(公告)号：US10802249B2
公开(公告)日：2020-10-13
申请号：US15985320
申请日：2018-05-21
申请人： CANON KABUSHIKI KAISHA
发明人： Shunji Iwamoto
IPC分类号： G02B9/64 , G02B13/02 , G02B7/10 , G02B13/06 , H04N5/232 , H04N5/225
摘要： A zoom lens including a first lens unit that has a positive refractive power, a second lens unit that has a negative refractive power, and at least one lens unit, in which the first lens unit, the second lens unit, and at least one lens unit are disposed from an object side to an image side in the above order. The first lens unit is formed of a single piece of lens element, and the zoom lens includes a positive lens on a side closest to an image. An Abbe number of the positive lens, back focuses at a wide angle end and a telescopic end, and focal lengths of the zoom lens at the wide angle end and the telescopic end are each set appropriately.

4. 发明申请

US20200174233A1 OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS INCLUDING THE SAME 审中-公开
公开(公告)号：US20200174233A1
公开(公告)日：2020-06-04
申请号：US16692953
申请日：2019-11-22
申请人： CANON KABUSHIKI KAISHA
发明人： Shunji Iwamoto
IPC分类号： G02B15/14 , G02B9/10
摘要： An optical system includes, in order from an object side to an image side, a first lens unit having positive refractive power, and a second lens unit having negative refractive power, wherein the first lens unit moves and the second lens unit does not move during focusing, wherein the first lens unit includes a positive lens arranged closest on the object side of the first lens unit, wherein the second lens unit includes three or more lenses including at least two negative lenses, wherein the first lens unit consists of a first subunit having positive refractive power, a second subunit having negative refractive power, and a third subunit having positive refractive power arranged in order from the object side to the image side, and wherein predetermined conditional expressions are satisfied.

5. 发明授权

US10379325B2 Optical system and optical apparatus including the same 有权
公开(公告)号：US10379325B2
公开(公告)日：2019-08-13
申请号：US15707221
申请日：2017-09-18
申请人： CANON KABUSHIKI KAISHA
发明人： Shunji Iwamoto , Shinichiro Saito , Satoshi Maetaki , Takahiro Hatada , Suguru Inoue
IPC分类号： G02B15/163 , G02B9/64 , C03C3/064 , 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.

6. 发明申请

US20180095255A1 CONVERSION LENS, AND IMAGING OPTICAL SYSTEM AND OPTICAL APPARATUS INCLUDING CONVERSION LENS 审中-公开
公开(公告)号：US20180095255A1
公开(公告)日：2018-04-05
申请号：US15707102
申请日：2017-09-18
申请人： CANON KABUSHIKI KAISHA
发明人： Shunji Iwamoto , Shinichiro Saito , Satoshi Maetaki , Takahiro Hatada , Suguru Inoue
IPC分类号： G02B15/163 , G02B9/62 , C03C3/097
CPC分类号： G02B15/163 , C03C3/097 , G02B9/62 , G02B27/0025
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.

7. 发明申请

US20180095254A1 OPTICAL SYSTEM AND OPTICAL APPARATUS INCLUDING THE SAME 审中-公开
公开(公告)号：US20180095254A1
公开(公告)日：2018-04-05
申请号：US15706986
申请日：2017-09-18
申请人： CANON KABUSHIKI KAISHA
发明人： Shunji Iwamoto , Shinichiro Saito , Satoshi Maetaki , Takahiro Hatada , Suguru Inoue
IPC分类号： G02B13/18 , G02B15/15
CPC分类号： G02B13/18 , G02B15/15 , G02B15/177 , H04N5/2254
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.

8. 发明申请

US20130235466A1 ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME 有权
标题翻译：变焦镜头和图像拾取器具
公开(公告)号：US20130235466A1
公开(公告)日：2013-09-12
申请号：US13785207
申请日：2013-03-05
申请人： CANON KABUSHIKI KAISHA
发明人： Shunji Iwamoto
IPC分类号： G02B13/00
CPC分类号： G02B13/009 , G02B15/16 , G02B15/173 , G02B27/646
摘要： A zoom lens includes, from the object side to the image side, first to sixth lens units having positive, negative, positive, negative, positive, negative refracting powers. In zooming from the wide angle end to the telephoto end, the lens units are moved such that the distance between the first and second lens units increases, the distance between the second and third lens units decreases, the distance between the third and fourth lens units increases, and the distance between the fourth and fifth lens units decreases. In focusing from an infinitely distant object to a near object, the sixth lens unit is moved toward the image side. The distance between the rear principal point of the second lens unit and the front principal point of the rear lens group at the wide angle end, and the focal length of the rear lens group at the wide angle end are appropriately set.
摘要翻译：变焦透镜包括从物体侧到像侧，具有正，负，正，负，正负折射光焦度的第一至第六透镜单元。在从广角端到望远端的变焦中，透镜单元移动，使得第一和第二透镜单元之间的距离增加，第二和第三透镜单元之间的距离减小，第三和第四透镜单元之间的距离增加，并且第四和第五透镜单元之间的距离减小。在从无限遥远的物体聚焦到近物体时，第六透镜单元朝向像侧移动。适当地设定第二透镜单元的后方主点与广角端的后透镜组的前主点之间的距离，以及广角端的后透镜组的焦距。

9. 发明申请

US20220035144A1 ZOOM LENS 有权
公开(公告)号：US20220035144A1
公开(公告)日：2022-02-03
申请号：US17381872
申请日：2021-07-21
申请人： CANON KABUSHIKI KAISHA
发明人： Shunji Iwamoto
IPC分类号： G02B15/20 , G02B27/00 , G02B15/14
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 power, and a rear unit having a positive refractive power as a whole and including one or more lens units. A distance between adjacent lens units changes during zooming. The first lens unit includes a first subunit having a positive refractive power and a second subunit disposed on the image side of the first subunit. The first subunit includes a first positive lens having the smallest absolute value of a focal length among lenses included in the first subunit. The second subunit includes a second positive lens and a first negative lens having the smallest absolute value of a focal length among negative lenses included in the second subunit. A predetermined condition is satisfied.

10. 发明申请

US20210096342A1 ZOOM LENS AND IMAGING APPARATUS INCLUDING THE SAME 有权
公开(公告)号：US20210096342A1
公开(公告)日：2021-04-01
申请号：US17028525
申请日：2020-09-22
申请人： CANON KABUSHIKI KAISHA
发明人： Makoto Nakahara , Shunji Iwamoto , Masato Katayose
IPC分类号： G02B15/14
摘要： A zoom lens L0 includes a first lens unit L1 having a positive refractive power, a second lens unit L2 having a negative refractive power, a third lens unit L3 having a positive refractive power, an intermediate lens group LM including a plurality of lens units, and a last lens unit LR having a negative refractive power. An interval between the adjacent lens units changes during zooming. The zoom lens L0 includes an aperture stop SP. The intermediate lens group LM includes a negative lens unit LN having a negative refractive power. Both the negative lens unit LN and the last lens unit LR move to an object side during zooming from a wide-angle end to a telephoto end. The zoom lens L0 satisfies predetermined conditional inequalities.

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