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公开(公告)号：US20230194852A1
公开(公告)日：2023-06-22
申请号：US18169717
申请日：2023-02-15
Applicant: FUJIFILM Corporation
Inventor： Hiroki SAITO
CPC classification number: G02B25/001 , G02B15/15 , G02B13/18
Abstract: An observation optical system includes a display element and an eyepiece lens disposed on an eyepoint side of the display element. The eyepiece lens includes a first lens having positive optical power, a second lens having negative optical power, and a third lens consecutively in order from closest to a display element side to the eyepoint side. In a case where a half value of a longest diameter of a display region in the display element is denoted by H, and a focal length of the eyepiece lens in a state where diopter is −1 diopter is denoted by f, the observation optical system satisfies a conditional expression represented by 0.35
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公开(公告)号：US20230043840A1
公开(公告)日：2023-02-09
申请号：US17812655
申请日：2022-07-14
Applicant: FUJIFILM Corporation
Inventor： Hiroki SAITO , Tatsuyuki OGINO , Masato KONDO , Takuya TANAKA
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; and a subsequent group that has a plurality of lens groups, wherein: the zoom lens includes an aperture stop at a position closer to the image side than a lens surface closest to the image side in the second lens group, a lens group closest to the image side in the subsequent group includes at least one negative lens of which an object side lens surface is a concave surface being in contact with air, during zooming, a spacing between the first lens group and the second lens group changes, a spacing between the second lens group and the subsequent group changes, and spacings between all adjacent lens groups in the subsequent group change.
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公开(公告)号：US20210199947A1
公开(公告)日：2021-07-01
申请号：US17116205
申请日：2020-12-09
Applicant: FUJIFILM Corporation
Inventor： Hiroki SAITO
Abstract: The eyepiece lens consists of, in order from an observation object side to an eye point side, a positive first lens, a negative second lens, a positive third lens, and a positive fourth lens. All lenses are single lenses. The second lens has a biconcave shape. An observation object-side surface of the fourth lens has a convex shape. In a case where a refractive index of the third lens with respect to d line is N3, the eyepiece lens satisfies the following conditional expression. 1.76
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公开(公告)号：US20140270746A1
公开(公告)日：2014-09-18
申请号：US14291607
申请日：2014-05-30
Applicant: FUJIFILM Corporation
Inventor： Hiroki SAITO
IPC: G03B13/06
CPC classification number: G03B13/06 , G02B13/003 , G02B15/161 , G02B23/145 , G03B13/10 , H04N5/23296
Abstract: The magnification of the variable magnification finder is switchable, and the finder includes a positive lens group, a negative lens group, and an eyepiece lens group in this order from an object side in a high magnification state. The positive lens group is retracted from an optical path of the variable magnification finder to the outside of the optical path and the negative lens group moves toward the object side when magnification is changed from the high magnification state to a low magnification state. The following conditional formula is satisfied when the focal length of the negative lens group is fN: −15 mm
Abstract translation: 可变倍率取景器的倍率可切换，并且取景器从高放大状态的物体侧依次包括正透镜组，负透镜组和目镜透镜组。 正透镜组从可变放大倍数取景器的光路缩回至光路外侧，而负透镜组在放大率从高放大状态变为低放大状态时向物体侧移动。 当负透镜组的焦距为fN：-15mm
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公开(公告)号：US20140168789A1
公开(公告)日：2014-06-19
申请号：US14188211
申请日：2014-02-24
Applicant: FUJIFILM Corporation
Inventor： Hiroki SAITO , Michio CHO , Toru ITO
IPC: G02B15/14
CPC classification number: G02B15/14 , G02B15/177 , G03B2205/0046
Abstract: A zoom lens substantially consists of: a first lens group having a negative refractive power and a second lens group having a positive refractive power arranged in order from the object side; that changes magnification by moving the first lens group and the second lens group; and wherein the first lens group is configured by a first lens having a negative refractive power, a second lens, a third lens having a negative refractive power, and a fourth lens having a positive refractive power, arranged in order from the object side. The zoom lens satisfies a predetermined conditional expression.
Abstract translation: 变焦透镜基本上由以下部分组成：具有负屈光力的第一透镜组和具有从物体侧开始依次布置的正折光力的第二透镜组; 通过移动第一透镜组和第二透镜组来改变放大率; 并且其中所述第一透镜组由具有负折光力的第一透镜，第二透镜，具有负折光力的第三透镜和具有正屈光力的第四透镜构成，所述第四透镜从物体侧开始依次排列。 变焦透镜满足预定条件表达式。
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Patent Agency Ranking
公开(公告)号：US20140168788A1
公开(公告)日：2014-06-19
申请号：US14184727
申请日：2014-02-20
Applicant: FUJIFILM Corporation
Inventor： Hiroki SAITO , Michio CHO , Toru ITO
IPC: G02B13/04
CPC classification number: G02B15/161 , G02B5/005 , G02B13/04 , G02B13/18 , G02B15/16 , G02B15/177 , G02B15/22 , G03B2205/0046
Abstract: A zoom lens includes: a first lens group having a negative refractive power; and a second lens group having a positive refractive power, provided in this order from an object side. Magnification is changed by moving the first lens group and the second lens group. The first lens group includes a first lens having a negative refractive power, a second lens, a third lens having a negative refractive power, and a fourth lens having a positive refractive power, provided in this order from the object side. The zoom lens satisfies predetermined conditional formulae.
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公开(公告)号：US20140153107A1
公开(公告)日：2014-06-05
申请号：US14174284
申请日：2014-02-06
Applicant: FUJIFILM Corporation
Inventor： Hiroki SAITO , Michio CHO , Toru ITO
IPC: G02B13/04
CPC classification number: G02B13/04 , G02B15/177
Abstract: A zoom lens includes: a first lens group having a negative refractive power; and a second lens group having a positive refractive power, provided in this order from an object side. Magnification is changed by moving the first lens group and the second lens group. The first lens group includes a first lens having a negative refractive power, a second lens, a third lens having a negative refractive power, and a fourth lens having a positive refractive power, provided in this order from the object side. The zoom lens satisfies predetermined conditional formulae.
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公开(公告)号：US20250050601A1
公开(公告)日：2025-02-13
申请号：US18926426
申请日：2024-10-25
Applicant: FUJIFILM Corporation
Inventor： Haruhiko MIYAMOTO , Hiroki SAITO , Nobuyuki IWAZAKI
Abstract: An optical system includes a compound lens that includes a first lens and a second lens. The first lens is made of a resin, and the second lens is made of glass. In a case where a maximum value of a thickness of the first lens is denoted by A [mm] and a minimum value of the thickness of the first lens is denoted by B [mm], the optical system satisfies Conditional Expressions (1) and (2). A / B ≤ 10 ( 1 ) A ≤ 3 mm ( 2 ) In a case where an amount of plastic deformation of the resin in a state where an indenter is pressed into the resin at a loading rate of 200 mN/10 sec at an environmental temperature of 25° C. is denoted by x [μm], the resin satisfies Conditional Expression (3). 1. μm ≤ x ≤ 4. μm ( 3 )
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公开(公告)号：US20180052383A1
公开(公告)日：2018-02-22
申请号：US15654090
申请日：2017-07-19
Applicant: FUJIFILM Corporation
Inventor： Shunsuke MIYAGISHIMA , Hiroki SAITO
CPC classification number: G03B13/06 , G02B9/12 , G03B13/16 , G03B17/20 , H04N5/23216 , H04N5/23293
Abstract: An ocular lens consists of a positive first lens group, a positive or negative second lens group, and a positive third lens group, in order from an observation object side. The first lens group consists of a positive meniscus lens with a convex surface toward an eye-point side. The second lens group includes a negative lens and a positive lens, and the number of lenses constituting the second lens group is three or less. The third lens group consists of a positive meniscus lens with a convex surface toward the eye-point side. The following conditional expression relating to a focal length of the whole system and a distance on an optical axis from a lens surface closest to the observation object side to a lens surface closest to the eye-point side is satisfied: 0.8
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公开(公告)号：US20170059833A1
公开(公告)日：2017-03-02
申请号：US15224826
申请日：2016-08-01
Applicant: FUJIFILM Corporation
Inventor： Hiroki SAITO
CPC classification number: G02B15/15 , G02B13/04 , G02B25/001 , G02B27/106
Abstract: A finder is a reverse Galileo type finder comprising, in order from the object side to the eye point side: an objective lens group having a negative refractive power; and an eyepiece lens group having a positive refractive power. The distance between the objective lens group and the eyepiece lens group is the longest distance from among distances between lenses, as an air converted length, in an observation optical system from the objective lens group to the eyepiece lens group. The eyepiece lens group consists of, in order from the object side to the eye point side: a first lens having a negative refractive power; a second lens having a positive refractive power; and a third lens having a negative refractive power. The first lens and the third lens are fixed while the second lens moves in the direction of the optical axis during diopter adjustment.
Abstract translation: 取景器是反向伽利略式取景器，其包括从物体侧到眼点侧的顺序：具有负折光力的物镜组; 以及具有正屈光力的目镜透镜组。 在从物镜组到目镜透镜组的观察光学系统中，物镜组与目镜透镜组之间的距离是从透镜之间的距离，作为空气转换长度的距离最长的距离。 目镜透镜组从物体侧到眼点侧依次包括具有负屈光力的第一透镜; 具有正屈光力的第二透镜; 和具有负屈光力的第三透镜。 第一透镜和第三透镜是固定的，而第二透镜在屈光度调节期间沿光轴的方向移动。
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