公开(公告)号：US20220291488A1

公开(公告)日：2022-09-15

申请号：US17637073

申请日：2020-08-24

Applicant: Nikon Corporation

Inventor： Hiroshi YAMAMOTO

IPC: G02B15/14 ,  G02B15/16 ,  G02B13/18

Abstract: A variable-power optical system (ZL) comprises a first lens group (G1) having a negative refractive power and a succeeding lens group (GR), which are disposed on an optical axis in that order from the object side. When varying magnification from wide angle to telephoto, the space between the adjacent lens groups changes. The succeeding lens group (GR) comprises: a first focusing lens group (G3) having a positive refractive power; and a second focusing lens group (G5) having a positive refractive power. When focusing from infinity to a proximate distance, the first focusing lens group (G3) moves toward the object side, and the second focusing lens group (G5) moves toward the image side.

公开(公告)号：US20220064051A1

公开(公告)日：2022-03-03

申请号：US17523515

申请日：2021-11-10

Applicant: NIKON CORPORATION

Inventor： Kohei YOSHIMOTO ,  Motoi UEDA ,  Hiroshi YAMAMOTO ,  Tatsunori KAWASHIMA

IPC: C03C3/068

Abstract: An optical glass includes, in terms of mol % of cations, a total amount of La3+, Y3+, and Gd3+ components falling within a range of from 5% to 65% and a total amount of Zr4+, Hf4+, and Ta5+ components falling within a range of from 5% to 65%, and a relationship expressed in Expression (1) given below is satisfied. (La3++Y3++Gd3+)×(Zr4++Hf4++Ta5+)≥400 (%)2

公开(公告)号：US20200223739A1

公开(公告)日：2020-07-16

申请号：US16823860

申请日：2020-03-19

Applicant: NIKON CORPORATION

Inventor： Kohei YOSHIMOTO ,  Motoi UEDA ,  Hiroshi YAMAMOTO ,  Tatsunori KAWASHIMA

IPC: C03C3/068

Abstract: An optical glass includes, in terms of mol % of cations, a total amount of La3+, Y3+, and Gd3+ components falling within a range of from 5% to 65% and a total amount of Zr4+, Hf4+, and Ta5+ components failing within a range of from 5% to 65%, and a relationship expressed in Expression (1) given below is satisfied. (La3++Y3++Gd3+)×(Zr4+Hf4++Ta3+) ≥400(%)2

公开(公告)号：US20180217363A1

公开(公告)日：2018-08-02

申请号：US15539033

申请日：2015-12-25

Applicant: Nikon Corporation

Inventor： Kensuke UCHIDA ,  Akihiko OBAMA ,  Norikazu YOKOI ,  Hiroshi YAMAMOTO ,  Taku MATSUO

IPC: G02B15/20 ,  G02B13/02 ,  G03B5/02

CPC classification number: G02B15/20 ,  G02B13/02 ,  G03B5/02 ,  G03B2205/0046

Abstract: A variable magnification optical system includes: a first lens group having a positive refractive power and arranged closest to an object; a negative lens group having a negative refractive power and arranged closer to an image than the first lens group; a positive lens group which has a positive refractive power, which includes at least one lens that moves integrally with an aperture stop, and which is arranged closer to the image than the negative lens group; and a focusing group arranged between the negative lens group and the positive lens group, wherein when varying magnification, a distance between the first lens group and the negative lens group is changed, and a distance between the negative lens group and the positive lens group is changed, wherein when focusing, a distance between the focusing group and a lens arranged at a position to face an object-side of the focusing group is changed, and a distance between the focusing group and a lens arranged at a position to face an image-side of the focusing group is changed, and wherein a predetermined conditional expression is satisfied.

公开(公告)号：US20180129026A1

公开(公告)日：2018-05-10

申请号：US15539017

申请日：2015-12-25

Applicant: Nikon Corporation

Inventor： Hiroshi YAMAMOTO ,  Taku MATSUO ,  Akihiko OBAMA ,  Kensuke UCHIDA

IPC: G02B15/20 ,  G02B27/64 ,  G02B15/163

CPC classification number: G02B15/20 ,  G02B15/163 ,  G02B15/173 ,  G02B27/646

Abstract: A variable magnification optical system includes: a first lens group having a positive refractive power and arranged closest to an object; a negative lens group having a negative refractive power and arranged closer to an image than the first lens group; and a focusing group arranged between the negative lens group and an aperture stop, wherein when varying magnification, the distance between the first lens group and the negative lens group is changed, and the distance between the negative lens group and the aperture stop is changed, wherein when focusing, the distance between the focusing group and a lens arranged at a position to face an object-side of the focusing group is changed, and the distance between the focusing group and a lens arranged at a position to face an image-side of the focusing group is changed, wherein the focusing group is constituted by one single lens having a positive refractive power, and a predetermined conditional expression is satisfied.

公开(公告)号：US20220373774A1

公开(公告)日：2022-11-24

申请号：US17879741

申请日：2022-08-02

Applicant: Nikon Corporation

Inventor： Tomoki ITO ,  Hiroshi YAMAMOTO

IPC: G02B15/14 ,  G02B5/00 ,  G02B27/00 ,  G02B27/64

Abstract: A zoom optical system includes, in order from an object, a first lens group having positive refractive power, a second lens group having negative refractive power, and a third lens group having positive refractive power. The first lens group moves toward an object and air distances between the first to the third lens groups are varied upon zooming from a wide-angle end state to a tele-photo end state. The first lens group comprises a cemented lens consisting of a negative lens and a positive lens in order from the object. The following conditional expressions are satisfied: 4.40

公开(公告)号：US20210191112A1

公开(公告)日：2021-06-24

申请号：US16771672

申请日：2017-12-15

Applicant: Nikon Corporation

Inventor： Masashi YAMASHITA ,  Tomoki ITO ,  Hiroshi YABUMOTO ,  Hiroshi YAMAMOTO ,  Satoshi MIWA ,  Keisuke TSUBONOYA ,  Ayumu MAKIDA ,  Takeru UEHARA

IPC: G02B27/00 ,  G02B3/00 ,  G02B7/02 ,  G02B15/14 ,  G02B15/16

Abstract: An optical system (LS) includes lenses (L22,L23) satisfying the following conditional expressions, ndLZ+(0.01425×νdLZ)

公开(公告)号：US20200041772A1

公开(公告)日：2020-02-06

申请号：US16599107

申请日：2019-10-10

Applicant: NIKON CORPORATION

Inventor： Tomoki ITO ,  Hiroshi YAMAMOTO

IPC: G02B15/173 ,  G02B5/00 ,  G02B27/00 ,  G02B27/64

Abstract: A zoom optical system includes, disposed in order from an object, a first lens group having positive refractive power, a second lens group having negative refractive power, and a third lens group having positive refractive power, wherein at least a part of the third lens group is arranged to be movable along an optical axis as a focusing lens group, the focusing lens group is moved toward an image when a focusing state on a long-distance object is changed to a focusing state on a short-distance object, and the following conditional expression is satisfied: 0.90

公开(公告)号：US20180143413A1

公开(公告)日：2018-05-24

申请号：US15538989

申请日：2015-12-25

Applicant: Nikon Corporation

Inventor： Kensuke UCHIDA ,  Akihiko OBAMA ,  Hiroshi YAMAMOTO ,  Taku MATSUO

IPC: G02B15/20 ,  G02B9/14 ,  G02B13/02

Abstract: A variable magnification optical system includes: a first lens group (G1) having a positive refractive power and arranged closest to an object; a negative lens group (G2) having a negative refractive power and arranged closer to an image than the first lens group; a positive lens group (G4) which has a positive refractive power, which includes at least one lens that is arranged closer to the image than an aperture stop (S), and which is arranged closer to the image than the negative lens group; and a focusing group (G3) arranged between the negative lens group and the positive lens group, wherein when varying magnification, the first lens group moves with respect to an image plane, a distance between the first lens group and the negative lens group is changed, and a distance between the negative lens group and the positive lens group is changed, wherein when focusing, a distance between the focusing group and a lens arranged at a position to face an object-side of the focusing group is changed, and a distance between the focusing group and a lens arranged at a position to face an image-side of the focusing group is changed, and wherein a predetermined conditional expression is satisfied.

公开(公告)号：US20170192212A1

公开(公告)日：2017-07-06

申请号：US15418777

申请日：2017-01-29

Applicant: Nikon Corporation

Inventor： Hiroshi YAMAMOTO

IPC: G02B15/20

CPC classification number: G02B15/20 ,  G02B5/005 ,  G02B9/34 ,  G02B13/002 ,  G02B13/004 ,  G02B13/009 ,  G02B13/18 ,  G02B15/14 ,  G02B15/163 ,  G02B15/17 ,  G02B15/173 ,  G02B27/0025 ,  G02B27/646

Abstract: A variable magnification optical system of the present application comprises a first lens group (G1) disposed at a most object side, a first focusing lens group (Ga) disposed at an image side of the first lens group, a second focusing lens group (Gb) disposed at an image side of the first focusing lens group, and a rear lens group (Gr) disposed at an image side of the second focusing lens group; upon varying magnification, the first lens group being moved, and an interval between the first lens group and the first focusing lens group, an interval between the first focusing lens group and the second focusing lens group, and an interval between the second focusing lens group and the rear lens group being varied; upon focusing, the first focusing lens group and the second focusing lens group being moved along the optical axis with different trajectories from each other; and a given conditional expression being satisfied.