Zoom Lens
AssigneesAsia Optical International Ltd., Sintai Optical (Shenzhen) Co., Ltd.
InventorMing-Chung Chen
Life of this patent
Estimating the term…
Abstract
A zoom lens includes a first lens group, a second lens group, a third lens group and a fourth lens group, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens group is with positive refractive power and includes a first lens that is with negative refractive power and a second lens that is with positive refractive power. The second lens group is with negative refractive power. The third lens group is with positive refractive power and includes a third lens front group that is with positive refractive power and a third lens rear group that is with positive refractive power. The fourth lens group is with positive refractive power.
Claims21
A zoom lens comprising a first lens group, a second lens group, a third lens group and a fourth lens group, all of which are arranged in sequence from an object side to an image side along an optical axis, wherein:
- the first lens group is with positive refractive power and comprises a first lens and a second lens, both of which are arranged in sequence from the object side to the image side along the optical axis, wherein the first lens is with negative refractive power and the second lens is with positive refractive power;
- the second lens group is with negative refractive power;
- the third lens group is with positive refractive power and comprises a third lens front group and a third lens rear group, both of which are arranged in sequence from the object side to the image side along the optical axis, wherein the third lens front group is with positive refractive power and the third lens rear group is with positive refractive power;
- and
- the fourth lens group is with positive refractive power.
Dependencies are inferred from the claim text.