Patent ID: 7684128
Filing Date: 2010-03-23
Classification: G02B

Abstract:
1. An optical lens system for taking image consisting of three lens elements, in order from the object side to the image side: a meniscus first lens element with positive refractive power having a convex object-side surface; an aperture stop; a meniscus plastic second lens element with negative refractive power having a convex image-side surface, an object-side surface and the image-side surface of the second lens element being both aspheric, an Abbe number of the second lens element being V2, and it satisfying the relation: and a meniscus plastic third lens element with negative refractive power having a convex object-side surface, the object-side surface and an image-side surface of the third lens element being both aspheric, an Abbe number of the third lens element being V3, and it satisfying the relation: wherein the focal length of the optical lens system for taking image is f, a focal length of the second lens element is f2, a focal length of the third lens element is f3, and they satisfy the relation: