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公开(公告)号：US20200064602A1
公开(公告)日：2020-02-27
申请号：US16542105
申请日：2019-08-15
Applicant: FUJIFILM Corporation
Inventor： Motoari OTA , Masaru YONEZAWA , Takuya TANAKA
IPC: G02B15/14 , G02B15/167
Abstract: The zoom lens, in order from the object side, a positive first lens group that does not move during zooming, a negative second lens group that moves during zooming, a negative third lens group that moves during zooming, at least one lens group that moves during zooming, and a rear group that does not move during zooming. All distances between the lens groups adjacent to each other change during zooming. The zoom lens satisfies predetermined conditional expressions.
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公开(公告)号：US20180188511A1
公开(公告)日：2018-07-05
申请号：US15843263
申请日：2017-12-15
Applicant: FUJIFILM Corporation
Inventor： Masaru YONEZAWA , Takuya TANAKA
CPC classification number: G02B15/20 , G02B7/021 , G02B7/04 , G02B15/163 , G02B27/0025
Abstract: The zoom lens consists of, in order from the object side, a first lens group that has a positive refractive power and remains stationary during zooming, a plurality of movable lens groups that move during zooming, and a final lens group that has a positive refractive power and remains stationary during zooming. The final lens group has two or more positive ED lenses formed of a material satisfying predetermined conditional expressions. The predetermined conditional expressions, which relate to extraordinary low dispersion and temperature coefficients of the refractive indices of the positive lenses in the movable lens group closest to the image side and the final lens group, are satisfied.
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公开(公告)号：US20220252851A1
公开(公告)日：2022-08-11
申请号：US17648259
申请日：2022-01-18
Applicant: FUJIFILM Corporation
Inventor： Masaru YONEZAWA
Abstract: The zoom lens consists of, in order from an object side: a first lens group that has a positive refractive power; a middle group that includes a plurality of lens groups each moving by changing a spacing with an adjacent lens group during zooming; and a final lens group that remains stationary during zooming and has a positive refractive power. Among the plurality of lens groups that move during zooming in the middle group, an image side movable lens group, which is a lens group disposed closest to the image side, has a negative refractive power.
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公开(公告)号：US20180188510A1
公开(公告)日：2018-07-05
申请号：US15843254
申请日：2017-12-15
Applicant: FUJIFILM Corporation
Inventor： Masaru YONEZAWA , Takuya TANAKA
IPC: G02B15/167 , G02B15/20
CPC classification number: G02B15/167 , G02B15/177 , G02B15/20
Abstract: The zoom lens consists of, in order from the object side, a first lens group that has a positive refractive power and remains stationary during zooming, a plurality of movable lens groups that move during zooming, and a final lens group that has a positive refractive power and remains stationary during zooming. The first lens group consists of, in order from the object side, a first lens group front group that has a negative refractive power and remains stationary during focusing, a first lens group intermediate group that has a positive refractive power and moves during focusing, and a first lens group rear group that has a positive refractive power. The first lens group front group has, successively in order from a position closest to the object side, a negative meniscus lens that is concave toward the image side and a negative lens.
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公开(公告)号：US20160274340A1
公开(公告)日：2016-09-22
申请号：US15068911
申请日：2016-03-14
Applicant: FUJIFILM Corporation
Inventor： Masaru YONEZAWA , Nobuaki TOYAMA
IPC: G02B15/167 , G02B27/00 , G02B15/20
CPC classification number: G02B15/163 , G02B27/0025
Abstract: A zoom lens consists of, in order from the object side, a positive first lens group that is fixed during magnification change, at least two movable lens groups that are moved during magnification change, and a positive end lens group that is disposed at the most image side and is fixed during magnification change. The first lens group consists of, in order from the object side, a negative first-a lens group that is fixed during focusing, a positive first-b lens group that is moved during focusing, and a positive first-c lens group. The first-a lens group includes at least two negative lenses, where the most object-side negative lens has a meniscus shape with the convex surface toward the object side, and a first-n lens, which is at least one negative lens of the rest of the negative lenses of the first-a lens group, satisfies given condition expressions (1) to (3).
Abstract translation: 变焦透镜从物体的顺序包括在放大变化期间固定的正的第一透镜组，在放大变化期间移动的至少两个可移动透镜组以及最多设置的正端透镜组 图像侧，并且在放大变化期间被固定。 第一透镜组从物体的顺序依次包括在聚焦期间固定的负第一透镜组，在聚焦期间移动的正的第一b透镜组和正的第一c透镜组。 第一透镜组包括至少两个负透镜，其中最物体侧负透镜具有朝向物体侧的凸表面的弯月形状，以及第一n透镜，其为至少一个负透镜 其余的第一透镜组的负透镜满足给定条件表达式（1）至（3）。
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Patent Agency Ranking
公开(公告)号：US20150346465A1
公开(公告)日：2015-12-03
申请号：US14709812
申请日：2015-05-12
Applicant: FUJIFILM Corporation
Inventor： Masaru YONEZAWA
Abstract: A rear attachment lens changes a focal-length of an entire lens-system, in which the rear attachment lens has been attached to a main-lens, to a longer focal-length-side than a focal-length of the main-lens by being attached to an image-side of the main-lens. The rear attachment lens consists essentially of a first-lens-group and a second-lens-group in this order from an object-side. The first-lens-group consists essentially of a negative lens and a positive lens in this order from the object-side. The second-lens-group consists essentially of at least one negative lens and at least one positive lens, and a lens closest to an image-side in the second lens-group is a positive lens. When an Abbe number for d-line and a partial dispersion ratio between g-line and F-line of the negative lens in the first-lens-group are νd1 and θgF1, respectively, conditional expression (1): νd1>62 and conditional expression (2): 0.64
Abstract translation: 后附加透镜将后附加透镜已经被附接到主透镜的整个透镜系统的焦距改变为比主镜头的焦距长的焦点长度侧 附着在主透镜的图像侧。 后附加透镜基本上由物体侧依次组成第一透镜组和第二透镜组。 第一透镜组从物体侧起依次由负透镜和正透镜组成。 第二透镜组基本上由至少一个负透镜和至少一个正透镜组成，并且最靠近第二透镜组中的图像侧的透镜是正透镜。 当第一透镜组中的负透镜的g线和f线之间的d线数和部分色散比分别为＆lt; d1和＆lt; gF1时，条件式（1）：＆ngr ; d1> 62和条件表达式（2）：0.64 <&&tas; gF1 + 0.001625×＆ngr; d1 <0.69。
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公开(公告)号：US20210088763A1
公开(公告)日：2021-03-25
申请号：US17016916
申请日：2020-09-10
Applicant: FUJIFILM Corporation
Inventor： Masaru YONEZAWA , Motoari OTA
Abstract: A zoom lens consists of, in order from an object side, a positive first lens group, a negative moving lens group, a first positive moving lens group, a second positive moving lens group, and a subsequent lens group including a stop. During zooming, the first lens group is not moved, and the negative moving lens group, the first positive moving lens group, and the second positive moving lens group are moved. The first positive moving lens group consists of a positive single lens and a cemented lens obtained by cementing a positive lens and a negative lens. The zoom lens satisfies a predetermined conditional expression.
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公开(公告)号：US20180335604A1
公开(公告)日：2018-11-22
申请号：US15978223
申请日：2018-05-14
Applicant: FUJIFILM Corporation
Inventor： Masaru AMANO , Masaru YONEZAWA
Abstract: The zoom lens consists of, in order from an object side: a first lens group (G1) that remains stationary during zooming and has a positive refractive power; and a subsequent section that consists of five or more lens groups including at least four movable lens groups. The first lens group (G1) is set as an A constituent section (SA), and a lens closest to the object side in the A constituent section (SA) has a negative refractive power. A lens group having a stop is set as a C constituent section (SC), and the C constituent section (SC) moves to the object side during zooming from a wide-angle end to a telephoto end, and then moves toward an image side. A spacing between the A constituent section (SA) and the C constituent section (SC) is set as a B constituent section (SB), and the B constituent section (SB) consists of one or two the movable lens groups, and has a negative refractive power. In addition, the zoom lens satisfies predetermined conditional expressions.
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公开(公告)号：US20180299642A1
公开(公告)日：2018-10-18
申请号：US16014027
申请日：2018-06-21
Applicant: FUJIFILM Corporation
Inventor： Masaru YONEZAWA , Shinkichi IKEDA
IPC: G02B7/10 , G02B15/20 , G02B15/167 , G02B13/18
Abstract: The zoom lens includes, in order from the object side: a first lens group G1 that has a positive refractive power and remains stationary during zooming; a plurality of movable lens groups that move by changing distances between groups adjacent to each other in a direction of an optical axis during zooming; and a final lens group Ge that has a positive refractive power and remains stationary during zooming. At least one movable lens group has a negative refractive power. The first lens group G1 has an image side positive lens, which is a positive lens disposed to be closest to the image side, and one or more positive lenses which are disposed to be closer to the object side than the image side positive lens. The zoom lens satisfies predetermined conditional expressions relating to the image side positive lens.
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公开(公告)号：US20180188508A1
公开(公告)日：2018-07-05
申请号：US15854280
申请日：2017-12-26
Applicant: FUJIFILM Corporation
Inventor： Takuya TANAKA , Masaru YONEZAWA
CPC classification number: G02B15/14 , G02B13/02 , G02B13/06 , G02B15/163 , G02B15/24
Abstract: The zoom lens consists of, in order from an object side: a first lens group that has a positive refractive power; a second lens group that has a positive refractive power; a third lens group that has a negative refractive power; a fourth lens group; and a fifth lens group that has a positive refractive power. The first lens group and the fifth lens group remain stationary with respect to an image plane during zooming. The second lens group, the third lens group, and the fourth lens group are moved by changing distances between the lens groups and adjacent groups in a direction of an optical axis during zooming, and are positioned to be closer to the image side at a telephoto end than at a wide-angle end. Conditional Expression (1) is satisfied. 0.8
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