公开(公告)号：US09594234B2

公开(公告)日：2017-03-14

申请号：US14140702

申请日：2013-12-26

Applicant: TAMRON CO., LTD

Inventor： Yoshito Iwasawa ,  Jun Takahashi

IPC: G02B15/173 ,  G02B15/14

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

Abstract: The zoom lens comprises five or more groups of lens pieces, namely, the foremost or first lens group of positive refractive power located the closest to an object, the succeeding second lens group of negative refractive power, the third lens group of positive refractive power, the fourth lens group of positive refractive power, and the fifth lens group all arranged in this order, and if any, the rearmost lens group(s) closer to the imaging plane than the fifth lens group. The zoom lens meets requirements as defined in the conditional expression regarding a combined magnification of the fifth lens group and, if any, the rearmost lens group(s) closer to the imaging plane than the fifth lens group while the zoom lens is taking a telephoto position.

Abstract translation: 变焦透镜包括五组或更多组透镜片，即位于最接近物体的正折射力的最前面或第一透镜组，负屈光力的后续第二透镜组，正屈光力的第三透镜组， 第四透镜组的正屈光力和第五透镜组全部以与第五透镜组相比更靠近成像面的最后面的透镜组顺序排列。 变焦镜头满足如条件表达式中关于第五透镜组的组合放大率和（如果有的话）比第五透镜组更靠近成像平面的最后一个透镜组的条件表达式中的要求，而变焦镜头正在拍摄长焦 位置。

公开(公告)号：US20160252706A1

公开(公告)日：2016-09-01

申请号：US15050852

申请日：2016-02-23

Applicant: Tamron Co., Ltd.

Inventor： Hisayuki Yamanaka ,  Keisuke Okada ,  Takahiko Sakai ,  Yoshito Iwasawa

IPC: G02B9/64 ,  G02B13/00 ,  G02B27/00

CPC classification number: G02B9/64 ,  G02B13/005 ,  G02B13/006 ,  G02B27/0025 ,  G02B27/646

Abstract: An optical system of the present invention includes, in order from an object side: a first lens group G1; a second lens group G2 having positive refractive power; and a third lens group G3 having positive refractive power, wherein the first lens group G1 and the third lens group G3 are fixed in an optical axis direction while the second lens group G2 is moved in an optical axis direction to focus on from an object at infinity to an object at a finite distance, and specified conditions is satisfied.

Abstract translation: 本发明的光学系统从物体侧起依次包括：第一透镜组G1; 具有正折射力的第二透镜组G2; 和具有正折光力的第三透镜组G3，其中第一透镜组G1和第三透镜组G3在光轴方向上固定，而第二透镜组G2沿光轴方向移动以从物体聚焦 无限远到有限距离的物体，并且满足指定的条件。

公开(公告)号：US09285571B2

公开(公告)日：2016-03-15

申请号：US14409670

申请日：2013-06-24

Applicant: Tamron Co., Ltd.

Inventor： Yoshito Iwasawa

IPC: G02B15/14 ,  H04N5/225

CPC classification number: G02B13/009 ,  G02B9/00 ,  G02B9/60 ,  G02B9/62 ,  G02B13/18 ,  G02B15/14 ,  G02B15/16 ,  G02B15/173 ,  G02B27/0025 ,  H04N5/225

Abstract: Provided are: a zoom lens which exhibits a large variable-power ratio, an increased degree of freedom with respect to aberration correction, and which has been achieved having a sufficient reduction in size in the optical axis direction; and an imaging device equipped therewith. The zoom lens includes at least, from the 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, and a fifth lens group, in that order. In the zoom lens, prescribed conditions are satisfied.

Abstract translation: 本发明提供：具有大的可变功率比的变焦透镜，相对于像差校正的增加的自由度，并且已经实现了在光轴方向上具有足够的尺寸的减小; 以及配备有该成像装置的成像装置。 变焦透镜至少包括物体侧具有正屈光力的第一透镜组，具有负屈光力的第二透镜组，具有正屈光力的第三透镜组，第四透镜组和第五透镜组， 以该顺序。 在变焦镜头中，满足规定的条件。