Patent ID: 9733457
Date: 2017-08-15
CPC Classifications: G02B

Claim:
1. A zoom lens, comprising: a first lens group, having a negative refractive power and comprising a first lens, a second lens, and a third lens arranged in sequence from a magnified side to a minified side, wherein refractive powers of the first lens, the second lens, and the third lens are respectively negative, negative, and positive; and a second lens group, having a positive refractive power, disposed between the first lens group and the minified side, and comprising a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens arranged in sequence from the magnified side to the minified side, wherein refractive powers of the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, and the tenth lens are respectively positive, negative, positive, negative, positive, negative, and positive, the first lens and the tenth lens are aspheric lenses, and the second lens to the ninth lens are spherical lenses.