Optical image capturing system

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;
• a first lens element positioning element being hollow and opaque, and having a cylinder and a basement which are connected with each other;
• the cylinder accommodating the four lens elements, and an outer periphery of the basement being greater than an outer periphery of the cylinder, and a maximum value of the minimum side length of the basement being perpendicular to the surface of an optical axis denoted by PhiD;
• wherein the optical image capturing system consists of four lens elements with refractive power, at least one of the four lens elements respectively has at least one inflection point on at least one surface thereof, at least one of the four lens elements with positive refractive power, focal lengths of the four 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 axial point on an object-side surface of the first lens element to an axial point on the image plane is HOS, a half of a maximum view angle of the optical image capturing system is HAF, a horizontal distance in parallel with the optical axis from a coordinate point on the object-side surface of the first lens element at height ½ HEP to the image plane is ETL, a horizontal distance in parallel with the optical axis from a coordinate point on the object-side surface of the first lens element at height ½ HEP to a coordinate point on an image-side surface of the fourth lens element at height ½ HEP is EIN, and the following relations are satisfied:
• 1.2≤f/HEP≤10, 0.5≤HOS/f≤20, 0.4≤|tan(HAF)|≤6.0, 0 mm<PhiD≤3.3 mm and 0.2≤EIN/ETL<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 positive refractive power;
• a third lens element with refractive power;
• a fourth lens element with refractive power;
• and
• an image plane;
• a first lens element positioning element being hollow and opaque, and having a cylinder and a basement which are connected with each other;
• the cylinder accommodating the four lens elements, and an outer periphery of the basement being greater than an outer periphery of the cylinder, and a maximum value of the minimum side length of the basement perpendicular to the surface of an optical axis denoted by PhiD;
• and a second lens element positioning element accommodated in the cylinder and including a positioning part and a connecting part;
• the positioning part being hollow and directing contacting and accommodating any of the four lens elements, facilitating the four lens elements being aligned on the optical axis, the connecting part disposed outside the positioning part and directly contacting an inner periphery of the cylinder, and a maximum diameter of the connecting part perpendicular to the surface of the optical axis denoted by PhiC;
• wherein the optical image capturing system consists of four lens elements with refractive power, at least one of an object-side surface and an image-side surface of at least one of the four lens elements has at least one inflection point, at least one of the four lens elements with positive refractive power, focal lengths of the four 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 half of a maximum view angle of the optical image capturing system is HAF, 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, a half of a maximum view angle of the optical image capturing system is HAF, a maximum effective diameter of an image-side surface of the fourth lens element denoted by PhiA4, a horizontal distance in parallel with the optical axis from a coordinate point on the object-side surface of the first lens element at height ½ HEP to the image plane is ETL, a horizontal distance in parallel with the optical axis from a coordinate point on the object-side surface of the first lens element at height ½ HEP to a coordinate point on the image-side surface of the fourth lens element at height ½ HEP is EIN, and the following relations are satisfied:
• 1.2≤f/HEP≤10, 0.5≤HOS/f≤15, 0.4≤|tan(HAF)|≤6.0, 0<PhiA4/InTL≤1.5, PhiC<PhiD, 0 mm<PhiD≤3.3 mm and 0.2≤EIN/ETL<1.