Patent ID: 9625678
Date: 2017-04-18
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; and an image plane; wherein the optical image capturing system consists of two lens elements with refractive power, at least one of the first and second lens elements has at least one inflection point on at least one surface thereof, at least one of the first and second lens elements has positive refractive power, focal lengths of the first and second lens elements are f1 and f2 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 on an optical axis 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 and second lens elements at height 1/2 HEP respectively are ETP1 and ETP2, a sum of ETP1 and ETP2 described above is SETP, thicknesses of the first and second lens elements on the optical axis respectively are TP1 and TP2, a sum of TP1 and TP2 described above is STP, and the following relations are satisfied: 1.2≦f/HEP≦10.0, 0.5≦HOS/f≦3 and 0.5≦SETP/STP<1.