Patent ID: 9256052
Filing Date: 2016-02-09
CPC Classification: G02B

Claim Text:
1. A wide-angle lens comprising a first lens, a second lens, a third lens, a fourth lens and a fifth 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 and comprises a concave surface facing the image side; the second lens is a biconcave lens with negative refractive power; the third lens is a biconvex lens with positive refractive power; the fourth lens is a biconvex lens with positive refractive power; the fifth lens is with negative refractive power and comprises a concave surface facing the object side; and the wide-angle lens satisfies: wherein TTL is a total lens length of the wide-angle lens and BFL is a back focal length of the wide-angle lens.