WIDE ANGLE OPTICAL LENS SYSTEM

摘要

A wide angle optical lens system includes an aperture stop and an optical assembly, the optical assembly includes, in order from the object side to the image side: a first lens element with a negative refractive power; a second lens element with a positive refractive power; a third lens element with a negative refractive power; a fourth lens element with a refractive power; a fifth lens element with a positive refractive power; a sixth lens element with a negative refractive power, wherein a focal length of the wide angle optical lens system is f, a focal length of the fifth lens element is f5, a radius of curvature of an object-side surface of the third lens element is R5, a radius of curvature of an image-side surface of the third lens element is R6, the following conditions are satisfied: 1.0

主权项

1. A wide angle optical lens system 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 negative refractive power having an aspheric object-side surface and an aspheric image-side surface, the first lens element being made of plastic material; a second lens element with a positive refractive power having an aspheric object-side surface and an aspheric image-side surface being convex near an optical axis; a third lens element with a negative refractive power having an aspheric object-side surface and an aspheric image-side surface being concave near an optical axis, the third lens element being made of plastic material; a fourth lens element with a refractive power having an aspheric object-side surface being convex near an optical axis and an aspheric image-side surface, the fourth lens element being made of plastic material; a fifth lens element with a positive refractive power having an aspheric object-side surface and an aspheric image-side surface being convex near an optical axis, the fifth lens element being made of plastic material; a sixth lens element with a negative refractive power having an aspheric object-side surface being convex near an optical axis and an aspheric image-side surface being concave near an optical axis, the sixth lens element being made of plastic material, more than one inflection point being formed on the object-side and image-side surfaces of the sixth lens element; wherein a focal length of the wide angle optical lens system is f, a focal length of the fifth lens element is f5, 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, and the following conditions are satisfied:
1.0