Patent ID: 7280289

Claim:
A wide angle imaging lens comprising, in order from an object side: a first lens of a meniscus lens having a negative refractive power and having a convex surface on the object side; a second lens having a negative refractive power and having a concave surface on an image side, at least one of both surfaces of the second lens being aspheric; a third lens having a positive refractive power and having a convex surface on the object side, at least one of both surfaces of the third lens being aspheric; an aperture diaphragm; and a fourth lens having a positive refractive power and having a convex surface on the image side, at least one of both surfaces of the fourth lens being aspheric, wherein the first lens comprises a material having Abbe number at d line of 40 or more, the second lens comprises a material having Abbe number at d line of 50 or more, the third lens comprises a material having Abbe number at d line of 40 or less, and the fourth lens comprises a material having Abbe number at d line of 50 or more.