Patent ID: 8451545
Filing Date: 2013-05-28
Classification: G02B

Abstract:
1. An image capturing optical system comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element; a third lens element; a fourth lens element with both the object-side and image-side surfaces thereof being aspheric, and the fourth lens element is made of plastic; and a fifth lens element with negative refractive power, both the object-side and image-side surfaces thereof being aspheric, at least one inflection point is formed on at least one of the object-side and image-side surfaces thereof, and the fifth lens element is made of plastic; wherein a focal length of the image capturing optical system is f, a focal length of the fifth lens element is f5, and they satisfy the following relation: