Patent ID: 7236315
Filing Date: 2007-06-26
Classification: G02B

Abstract:
1. A compact lens system comprising a first lens element on the object side and a second lens element on the image side, the first and second lens elements having opposite refractive power, the first lens element having a first convex surface facing the object side and an opposite first concave surface on the image side, at least one of the first convex and concave surfaces being aspheric, the second lens element having a second convex surface facing the image side and an opposite second concave surface on the object side, at least one of the second convex and concave surfaces being aspheric, said compact lens system having no more than two lens elements; wherein, the first and second lens elements satisfy the following condition: where, f 1 represents the focal length of the first lens element, and f 2 represents the focal length of the second lens element.