Patent ID: 7184226
Filing Date: 2007-02-27
Classification: G02B

Abstract:
1. A hybrid lens system comprising, in order from an object side to an image side: a first positive lens made of glass material and comprising a first spherical surface and a second spherical surface, the first surface facing toward the object side and being convex, and the second surface facing toward the image side and being convex, wherein a refractive index N a second negative lens made of plastic material and comprising a third aspheric surface and a fourth aspheric surface, the third surface facing toward the object side and being concave, the fourth surface facing toward the image side and being convex; and a third positive lens made of plastic material and comprising a fifth aspheric surface and a sixth aspheric surface, the fifth surface facing toward the object side and being convex, and the sixth surface facing toward the image side and being concave.