Patent ID: 9513464
Filing Date: 2016-12-06
CPC Classification: G02B

Claim Text:
1. An optical image capturing system, from an object side to an image side, comprising: a first lens element with positive refractive power; a second lens element with refractive power; a third lens element with refractive power; a fourth lens element with refractive power; and an image plane; wherein the optical image capturing system consists of four lens elements with refractive power, at least two lens elements among the four lens elements respectively have at least one inflection point on at least one surface thereof, at least one of the second through fourth lens elements has positive refractive power, an object-side surface and an image-side surface of the fourth lens element are aspheric, focal lengths of the first through fourth lens elements are f1, f2, f3 and f4 respectively, a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is HEP, a distance from an object-side surface of the first lens element to the image plane is HOS, a distance from the object-side surface of the first lens element to the image-side surface of the fourth lens element on an optical axis is InTL, a sum of an absolute value of each distance in parallel with the optical axis from a maximum effective half diameter position on an object-side surface of each of the four lens elements to an axial point on the object-side surface of each of the four lens elements is InRSO, a sum of an absolute value of each distance in parallel with the optical axis from a maximum effective half diameter position on an image-side surface of each of the four lens elements to an axial point on the image-side surface of each of the four lens elements is InRSI, a sum of InRSO and InRSI is Σ|InRS|, and the following relations are satisfied: 1.2≦f/HEP≦6.0, 0.5≦HOS/f≦3.0 and 0<Σ|InRS|/InTL≦3.