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。