Patent ID: 9632286
Date: 2017-04-25
CPC Classifications: G02B

Claim:
1. An optical image capturing system, sequentially arranged 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 comprises the four lens elements with refractive power, 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 on an optical axis from the object-side surface of the first lens element to the image-side surface of the fourth lens element is InTL, a sum of an absolute value of each distance in parallel with the optical axis from a maximum effective 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 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 relation is satisfied: 1.2≦f/HEP≦6.0, 0.5≦HOS/f≦3.0, and 0<Σ|InRS|/InTL≦3, and wherein at least one surface of the third lens element has at least two inflection points.