Wide-angle lens assembly
AssigneesSintai Optical (Shenzhen) Co., Ltd., Asia Optical International Ltd.
InventorYu-Min Chang
Life of this patent
Estimating the term…
Abstract
A wide-angle lens assembly includes a first lens, a second lens, a third lens, a first stop, a fourth lens, a fifth lens and a sixth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens is with negative refractive power. The second lens is with negative refractive power. The third lens is with positive refractive power. The fourth lens is with positive refractive power. The fifth lens is with negative refractive power. The sixth lens is with positive refractive power. The fifth lens satisfies 16.1≦Vd5≦23.9, wherein Vd5 is an Abbe number of the fifth lens.
Claims13
A wide-angle lens assembly comprising a first lens, a second lens, a third lens, a first stop, a second stop, a fourth lens, a fifth lens and a sixth lens, all of which are arranged in sequence from an object side to an image side along an optical axis, wherein:
- the first lens is with negative refractive power;
- the second lens is with negative refractive power;
- the third lens is with positive refractive power;
- the fourth lens is with positive refractive power;
- the fifth lens is with negative refractive power;
- the sixth lens is with positive refractive power;
- the fifth lens satisfies:
- 16.1≦Vd5≦23.9
- wherein Vd5 is an Abbe number of the fifth lens;
- the second stop is disposed between the third lens and the fourth lens;
- and
- the third lens, the fourth lens, the first stop and the second stop satisfy:
- 0.09≦DST/DL3L4≦0.35
- wherein DST is an interval between the first stop and the second stop and DL3L4 is an interval between the third lens and the fourth lens.
Dependencies are inferred from the claim text.