Patent ID: 6894848
Filing Date: 2005-05-17
Classification: G02B

Abstract:
1. An image scanning lens comprising, in order from the object side with no intervening lens element: a first lens component having positive refractive power and a meniscus shape with its convex surface on the object side and including a first lens element having positive refractive power and a meniscus shape with its convex surface on the object side; a second lens component having a biconcave shape and including a second lens element having a biconcave shape; a third lens component having a biconvex shape and including a third lens element having a biconvex shape; a fourth lens component having negative refractive power and a concave surface on the object side and including a fourth lens element having negative refractive power and a concave surface on the object side; wherein the following conditions are satisfied: where where