公开(公告)号：US20210333525A1

公开(公告)日：2021-10-28

申请号：US17098948

申请日：2020-11-16

Applicant: TAMRON CO., LTD.

Inventor： Takahiro MITSUHASHI

IPC: G02B15/14 ,  G02B15/16

Abstract: A zoom lens includes a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a rear group having a positive refractive power as a whole in order from an object side. The zoom lens has specific optical characteristics indicated by two expressions.

公开(公告)号：US20130215518A1

公开(公告)日：2013-08-22

申请号：US13743651

申请日：2013-01-17

Applicant: TAMRON CO., LTD.

Inventor： Takahiro MITSUHASHI

IPC: G02B15/14

CPC classification number: G02B15/14 ,  G02B15/173

Abstract: A zoom lens includes sequentially from an object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, an aperture stop, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and fifth lens group. The zoom lens further satisfies given conditions.

Abstract translation: 变焦透镜从物体侧顺序地包括具有正折光力的第一透镜组，具有负屈光力的第二透镜组，孔径光阑，具有正屈光力的第三透镜组，具有正屈光力的第四透镜组， 正屈光力和第五透镜组。 变焦镜头进一步满足给定条件。

公开(公告)号：US20210199939A1

公开(公告)日：2021-07-01

申请号：US16992512

申请日：2020-08-13

Applicant: TAMRON CO., LTD.

Inventor： Hirofumi TABATA ,  Takahiro MITSUHASHI ,  Toshiya SEGAWA

IPC: G02B15/20 ,  G02B15/14 ,  G02B27/00

Abstract: A zoom lens includes, in order from an object side, a first lens group that is positive, a second lens group that is negative, a third lens group that is positive, and a fourth lens group that is positive. During zooming from a wide angle end to a telephoto end, at least the first lens group and the third lens group are fixed and an interval on an optical axis of an adjacent lens group relative thereto is changed. In the zoom lens, the fourth lens group includes at least one positive lens and satisfies a predetermined conditional expression. In addition, an imaging device includes the zoom lens and an image sensor.

公开(公告)号：US20160124181A1

公开(公告)日：2016-05-05

申请号：US14830011

申请日：2015-08-19

Applicant: TAMRON CO., LTD.

Inventor： Takayuki NODA ,  Takahiro MITSUHASHI ,  Seigou NAKAI

IPC: G02B13/00 ,  G02B27/00 ,  G02B15/177

CPC classification number: G02B13/009 ,  G02B13/006 ,  G02B15/177 ,  G02B27/0025

Abstract: A wide angle zoom lens includes sequentially from the object side, a first lens group having a negative refractive power overall and three lenses, including first to third lenses, having a negative refractive power and disposed farthest on the object side; a second lens group having a positive refractive power overall and one or more sets of cemented lenses; and a third lens group having a negative refractive power. This ultra wide angle zoom lens varies intervals between the first lens group, the second lens group, and the third lens group on the optical axis to zoom from the wide angle end to the telephoto end and satisfies given conditions to thereby enable a high zoom ratio, large diameter, and high resolution.

Abstract translation: 广角变焦透镜从物体侧顺序地包括具有负屈光力的第一透镜组和包括第一至第三透镜的三个透镜，具有负折光力并且在物体侧最远设置的三个透镜; 具有整体正屈光力的第二透镜组和一组或多组胶合透镜; 以及具有负屈光力的第三透镜组。 该超广角变焦透镜在第一透镜组，第二透镜组和第三透镜组之间在光轴上改变间隔，以从广角端到望远端变焦，并满足给定条件，从而能够实现高变焦比 ，直径大，分辨率高。