Patent ID: 7355801
Filing Date: 2008-04-08
Classification: G02B

Abstract:
1. An image pickup lens assembly comprising three lens groups, from the object side to the image side: a first lens group consisting of two lenses with refractive power, wherein the first lens of the first lens group is a positive lens, the front surface of the first lens is convex, the second lens of the first lens group is a negative lens, the rear surface of the second lens is concave; a second lens group including a meniscus third lens with positive refractive power, wherein a rear surface of the third lens is convex; a third lens group including a fourth lens with negative refractive power, wherein the front surface of the fourth lens is convex, and the rear surface of the fourth lens is aspheric; an aperture stop being formed in the first lens group and located between the first lens and the second lens.