Patent ID: 9182573
Filing Date: 2015-11-10
Classification: G02B

Abstract:
1. An imaging lens comprising an aperture stop and an optical assembly, the optical assembly comprising: in order from an object side to an image side: a first lens element with a positive refractive power having an object-side surface being convex near an optical axis and an image-side surface being concave near the optical axis, the object-side and image-side surfaces of the first lens element being aspheric; a second lens element with a positive refractive power having an image-side surface being concave near the optical axis, an object-side and the image-side surfaces of the second lens element being aspheric, the second lens element being made of plastic material; a third lens element with a positive refractive power having an aspheric object-side surface and an aspheric image-side surface, the third lens element being made of plastic material; a fourth lens element with a negative refractive power having an object-side surface being concave near the optical axis and an image-side surface being convex near the optical axis; a fifth lens element with a positive refractive power having an object-side surface being convex near the optical axis and an image-side surface being concave near the optical axis, the object-side and image-side surfaces of the fifth lens element being aspheric, the fifth lens element being made of plastic material, more than one inflection point being formed on the object-side and image-side surfaces of the fifth lens element; wherein a radius of curvature of the object-side surface of the third lens element is R5, a radius of curvature of the image-side surface of the third lens element is R6, a distance from the object-side surface of the first lens element to an image plane along the optical axis is TL, a half of a maximum diagonal imaging height of the imaging lens is ImgH, and the following conditions are satisfied: