Patent ID: 11914123
Assignee: AAC OPTICS (CHANGZHOU) CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A zoom lens, being sequentially from an object side to an image side, consisting of:
a first lens having a negative refractive power;
a second lens group having a positive refractive power;
a fifth lens having a positive refractive power; and
a sixth lens having a negative refractive power;
wherein, when zooming, among the first lens, the second lens group, the fifth lens, and the sixth lens, a spacing in an optical axis direction of adjacent lenses or lens groups changes;
wherein, the second lens group consists of a second lens having a positive refractive power, a third lens having a negative refractive power, and a fourth lens having a negative positive power;
wherein, a focal length of the zoom lens in a wide-angle end is denoted as f_Wide, a focal length of the zoom lens in a telephoto end is denoted as f_Tele, an on-axis distance from an image side surface of the first lens to an object side of the second lens, in the wide-angle end, is denoted as D12_Wide, an on-axis distance from the image side surface of the first lens to the object side surface of the second lens, in the telephoto end, is denoted as D12_Tele, an on-axis distance from an image side surface of the fifth lens to an object side surface of the sixth lens, in the wide-angle end, is denoted as d11_Wide, an on-axis distance from the image side surface of the fifth lens to the object side surface of the sixth lens, in the telephoto end, is denoted as d11_Tele, total number of lenses in the zoom lens with refractive power is six, and the zoom lens satisfies following relationships (1)˜(3):

f_Tele/f_Wide≥1.80  (1);

40.00≤D12_Wide/D12_Tele≤48.00  (2);

2.00␣d11_Wide/d11_Tele≤2.60  (3).