Patent ID: 9091838
Filing Date: 2015-07-28
Classification: G02B

Abstract:
1. A thin-type wide-angle imaging lens assembly with five lenses comprising a fixing diaphragm and an optical set; said optical set including a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, an arranging order thereof from an object side to an image side being: said first lens having a positive refractive power defined near an optical axis and a concave surface directed toward said image side; at least one surface of said first lens being aspheric; said second lens having a positive refractive power defined near the optical axis and a convex surface directed toward said image side; at least one surface of said second lens being aspheric; said third lens having a lens with a negative refractive power defined near the optical axis and a concave surface directed toward said object side; at least one surface of said third lens being aspheric; said fourth lens having a positive refractive power defined near the optical axis, a concave surface directed toward said object side and disposed near said optical axis, and a convex surface directed toward said image side and disposed near said optical axis; at least one surface of said fourth lens being aspheric; said fifth lens having a convex surface with a corrugated contour directed toward said object side and disposed near said optical axis, and a concave surface with a corrugated contour directed toward said image side and disposed near said optical axis; at least one surface of said fifth lens being aspheric; said fixing diaphragm being disposed between an object and said third lens; said thin-type wide-angle imaging lens assembly with five lenses satisfying the following conditional expression: 0.3<f/TL<0.8, wherein said TL is defined as a distance from object side surface of said first lens to the image plane on the optical axis, said f is a focal length of said entire assembly, and 0.7<TL/Dg<1.3, wherein said Dg is defined as a length diagonal of a maximum using visual angle of said lens assembly imaged on said imaging plane.