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公开(公告)号：US11988821B2
公开(公告)日：2024-05-21
申请号：US17355254
申请日：2021-06-23
Applicant: FUJIFILM Corporation
Inventor： Yasutaka Shimada , Takuya Tanaka , Takashi Kunugise
CPC classification number: G02B15/145129 , G02B13/009 , G02B13/18 , G02B15/20
Abstract: A zoom lens consisting of, in order from an object side to an image side: a first lens group that has a positive refractive power; a second lens group that has a negative refractive power; an intermediate lens group that consists of one or two lens groups; and a final lens group, wherein during zooming, the second lens group moves along an optical axis, and all distances between adjacent lens groups change.
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公开(公告)号：US20190064478A1
公开(公告)日：2019-02-28
申请号：US15999029
申请日：2018-08-20
Applicant: FUJIFILM Corporation
Inventor： Yasutaka Shimada
Abstract: The zoom lens consists of, in order from an object side, a first lens group having a positive power, a second lens group having a negative power, a third lens group having a negative power, a stop, a fourth lens group having a positive power, and a fifth lens group having a positive power. During zooming, the first lens group and the fifth lens group remain stationary, and the other lens groups and the stop move. The most image side positive lens is disposed to be closest to the image side in the first lens group. The following conditional expression relating to a partial dispersion ratio θgF1p of the most image side positive lens between the g line and the F line and an Abbe number ν1p is satisfied: 0.6376
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公开(公告)号：US09128275B2
公开(公告)日：2015-09-08
申请号：US14513416
申请日：2014-10-14
Applicant: FUJIFILM CORPORATION
Inventor： Yasutaka Shimada
IPC: G02B15/14 , G02B15/177 , G02B13/00
CPC classification number: G02B15/177 , G02B13/009
Abstract: A variable magnification optical system includes a negative first lens group, a stop, and a positive second lens group. The distance in an optical axis direction between the first and the second lens groups is reduced when magnification is changed from the wide angle end to the telephoto end. The stop is fixed with respect to an image plane when magnification is changed, and the first lens group includes a positive lens, a negative lens, a negative lens, and a positive meniscus lens with a convex surface on the object side in order from the object side. The optical system satisfies predetermined conditional expressions with respect to the average Abbe number of the positive lens and the positive meniscus lens of the first lens group at the d-line, and the focal length of the entire system at the wide angle end and the focal length of the negative lens.
Abstract translation: 可变倍率光学系统包括负第一透镜组，止挡和正第二透镜组。 当从广角端到望远端变化时，在第一和第二透镜组之间的光轴方向上的距离减小。 当放大率改变时，停止部分相对于图像平面被固定，并且第一透镜组包括正透镜，负透镜，负透镜和在物侧上具有凸表面的正弯月透镜 物体侧。 该光学系统相对于d轴上的第一透镜组的正透镜和正弯月透镜的平均阿贝数和广角端的整个系统的焦距和焦点满足预定条件表达式 负透镜的长度。
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公开(公告)号：US09128271B2
公开(公告)日：2015-09-08
申请号：US14452745
申请日：2014-08-06
Applicant: FUJIFILM Corporation
Inventor： Yasutaka Shimada , Michio Cho
CPC classification number: G02B13/06 , G02B9/64 , G02B13/006
Abstract: A super wide angle lens substantially consists of a positive first lens group in which a positive first lens, a negative second lens, a negative third lens, a negative fourth lens, a positive fifth lens, a sixth lens unit that is a cemented lens, a seventh lens, an aperture stop, and an eighth lens unit that is a cemented lens are arranged in this order from an object side, a second lens group in which a first lens unit that is a positive single lens or a cemented lens and a second lens unit that is a cemented lens are arranged in this order from the object side, and a third lens group including a positive lens. The super wide angle lens is structured in such a manner to satisfy conditional formula (1): 0.8
Abstract translation: 超广角镜头基本上由正的第一透镜组构成，其中正的第一透镜，负的第二透镜，负的第三透镜，负的第四透镜，正的第五透镜，作为胶合透镜的第六透镜单元， 第七透镜，孔径光阑和作为胶合透镜的第八透镜单元从物体侧依次配置，第二透镜组，其中作为正单透镜的第一透镜单元或胶合透镜， 作为胶合透镜的第二透镜单元从物体侧依次排列，以及包括正透镜的第三透镜组。 超广角镜头以满足条件式（1）的方式构成：0.8 <（T16 + T17）/ f <2.5。
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