Patent ID: 9547154
Date: 2017-01-17
CPC Classifications: G02B

Claim:
1. An optical image capturing system, from an object side to an image side, comprising: a first lens element with 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 first through fourth lens elements respectively have at least one inflection point on at least one surface thereof, at least one of the first 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, 12, 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 axial point on an object-side surface of the first lens element to an axial point on the image plane is HOS, thicknesses in parallel with an optical axis of the first lens element, the second lens element, the third lens element and the fourth lens element at height ½ HEP respectively are ETP1, ETP2, ETP3 and ETP4, a sum of ETP1 to ETP4 described above is SETP, thicknesses of the first lens element, the second lens element, the third lens element and the fourth lens element on the optical axis respectively are TP1, TP2, TP3 and TP4, a sum of TP1 to TP4 described above is STP, and the following relations are satisfied: 1.2≦f/HEP≦6.0, 0.5≦HOS/f≦3 and 0.5≦SETP/STP<1.