公开(公告)号：US20180321473A1

公开(公告)日：2018-11-08

申请号：US16037803

申请日：2018-07-17

Applicant: NIKON CORPORATION

Inventor： Tomoyuki SASHIMA ,  Akihiko OBAMA

IPC: G02B15/14

CPC classification number: G02B15/14 ,  G02B15/173 ,  G02B27/646 ,  Y10T29/49826

Abstract: A variable magnification optical system includes, in order from an object side, 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; upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens group and the second lens group and a distance between the second lens group and the third lens group being varied. The variable magnification optical system further includes a V lens group GV having negative refractive power and being moved to have a component in a direction perpendicular to the optical axis, and an F lens group GF having positive refractive power and being moved along the optical axis upon focusing from an infinitely distant object to a close object, the V lens group GV being disposed on the more object side than the F lens group GF. Thereby, it is possible to provide the compact variable magnification optical system with a high zoom ratio and high performance, an optical apparatus therewith and a method for manufacturing the variable magnification optical system.

公开(公告)号：US20150323770A1

公开(公告)日：2015-11-12

申请号：US14700276

申请日：2015-04-30

Applicant: NIKON CORPORATION

Inventor： Tomoyuki SASHIMA ,  Akihiko OBAMA

IPC: G02B15/163 ,  G02B27/00

CPC classification number: G02B15/163 ,  G02B13/18 ,  G02B15/173 ,  G02B15/20 ,  G02B27/0025

Abstract: Composing, in order from an object side: a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having positive refractive power; a fourth lens group having positive refractive power and a fifth lens group; upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens group and the second lens group, a distance between the second lens group and the third lens group, a distance between the third lens group and the fourth lens group and a distance between the fourth lens group and the fifth lens group being varied, and predetermined conditional expression being satisfied, thereby providing a small-size variable magnification optical system having a high zoom ratio and a high optical performance, an optical apparatus, and a method for manufacturing the variable magnification optical system.

Abstract translation: 从物体的顺序构成：具有正折射光焦度的第一透镜组; 具有负屈光力的第二透镜组; 具有正折射力的第三透镜组; 具有正屈光力的第四透镜组和第五透镜组; 在从广角端状态变焦到望远端状态时，第一透镜组与第二透镜组之间的距离，第二透镜组与第三透镜组之间的距离，第三透镜​​组与第三透镜组之间的距离 第四透镜组和第四透镜组与第五透镜组之间的距离变化，并且满足预定条件表达式，从而提供具有高变焦比和高光学性能的小尺寸可变倍率光学系统，光学装置 ，以及可变倍率光学系统的制造方法。

公开(公告)号：US20150234160A1

公开(公告)日：2015-08-20

申请号：US14700295

申请日：2015-04-30

Applicant: NIKON CORPORATION

Inventor： Akihiko OBAMA ,  Tomoyuki SASHIMA

IPC: G02B15/14

CPC classification number: G02B15/14 ,  G02B3/02 ,  G02B3/04 ,  G02B5/005 ,  G02B9/60 ,  G02B13/0045 ,  G02B13/009 ,  G02B13/12 ,  G02B13/18 ,  G02B15/173 ,  G02B15/20 ,  G02B23/2438 ,  Y10T29/49826

Abstract: Comprising, in order from an object side: a first lens group G1 having positive refractive power; a second lens group G2 having negative refractive power; a third lens group G3 having positive refractive power; a fourth lens group G4 having positive refractive power; and a fifth lens group; upon zooming from a wide-angle end state to a telephoto end state, the distance between the first lens group G1 and the second lens group G2, the distance between the second lens group G2 and the third lens group G3, and the distance between the third lens group G3 and the fourth lens group G4, and the distance between the fourth lens group G4 and the fifth lens group G5 being varied, and the fifth lens group G5 being fixed in a position; and a predetermined conditional expression being satisfied, thereby providing a variable magnification optical system that has a high variable magnification ratio, is compact in size and has high optical performance, an optical apparatus, and a method for manufacturing the variable magnification optical system.

Abstract translation: 从物体侧起依次包括具有正折射力的第一透镜组G1; 具有负屈光力的第二透镜组G2; 具有正屈光力的第三透镜组G3; 具有正屈光力的第四透镜组G4; 和第五透镜组; 在从广角端状态变焦到望远端状态时，第一透镜组G1和第二透镜组G2之间的距离，第二透镜组G2和第三透镜组G3之间的距离以及第二透镜组G2之间的距离 第三透镜组G3和第四透镜组G4，第四透镜组G4和第五透镜组G5之间的距离变化，第五透镜组G5固定在一个位置; 并且满足预定的条件表达式，从而提供具有高可变放大比，尺寸紧凑并且具有高光学性能的可变倍率光学系统，光学装置和用于制造可变倍率光学系统的方法。

公开(公告)号：US20140334013A1

公开(公告)日：2014-11-13

申请号：US14270270

申请日：2014-05-05

Applicant: NIKON CORPORATION

Inventor： Akihiko OBAMA ,  Norikazu YOKOI ,  Issei TANAKA

IPC: G02B15/14

CPC classification number: G02B15/16 ,  G02B15/14 ,  G02B15/173 ,  Y10T29/49826

Abstract: In a zoom lens system, an optical apparatus, and a manufacturing method, there are provided, in order from an object side: a first lens group having positive power, a second lens group having negative power, a third lens group having positive power, a fourth lens group having negative power, a fifth group having positive power, and an aperture stop disposed to an image side of the second lens group. Upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens and second lens groups increases, a distance between the second and third lens groups decreases, a distance between the third and fourth lens groups varies, and a distance between the fourth and fifth lens groups varies. With given conditions being satisfied, high optical performance with suppressing variation in aberrations are achieved.

Abstract translation: 在变焦透镜系统，光学装置和制造方法中，从物体侧起依次提供具有正光焦度的第一透镜组，具有负光焦度的第二透镜组，具有正光焦度的第三透镜组， 具有负功率的第四透镜组，具有正功率的第五组和设置在第二透镜组的像侧的孔径光阑。 在从广角端状态变焦到望远端状态时，第一透镜和第二透镜组之间的距离增加，第二透镜组与第三透镜组之间的距离减小，第三透镜​​组和第四透镜组之间的距离变化，并且 第四和第五透镜组之间的距离变化。 在满足给定条件的情况下，实现了抑制像差变化的高光学性能。