Optical image capturing system

An optical image capturing system, in order along an optical axis from an object side to an image side, comprising:

• a first lens having positive refractive power;
• a second lens having negative refractive power;
• a third lens having positive refractive power;
• a fourth lens having refractive power;
• and
• an image plane;
• wherein the lenses within the optical image capturing system consists of the four lenses with refractive power;
• at least two of the lenses from the first lens to the fourth lens each has at least an inflection point on a surface thereof;
• at least one of the lenses from the third lens to the fourth lens has positive refractive power;
• the fourth lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side, and both the object-side surface and the image-side surface of the fourth lens are aspheric surfaces;
• wherein the optical image capturing system satisfies:
• 1.8≦f/HEP≦2.0;
• 0.5≦HOS/f≦3.0;
• and 0<Σ|InRS|/InTL≦3;
• where f is a focal length of the optical image capturing system;
• HEP is an entrance pupil diameter of the optical image capturing system;
• HOS is a distance along the optical axis between an object-side surface, which face the object side, of the first lens and the image plane;
• InTL is a distance between the object-side surface of the first lens and the image-side surface of the fourth lens along the optical axis;
• and Σ|InRS| is a sum of absolute values of a displacement for each lens with refractive power from a central point passed through by the optical axis to a point on the optical axis where a projection of the maximum effective semi diameter ends, wherein Σ|InRS|=InRSO+InRSI while InRSO is a sum of absolute value of the displacement for each lens with refractive power from the central point on the object-side surface passed through by the optical axis to the point on the optical axis where the projection of the maximum effective semi diameter of the object-side surface ends, and InRSI is a sum of absolute value of the displacement for each lens with refractive power from the central point on the image-side surface passed through by the optical axis to the point on the optical axis where the projection of the maximum effective semi diameter of the image-side surface ends;
• wherein the optical image capturing system further satisfies:
• 35 degrees<HAF≦45 degrees;
• where HAF is a half of a view angle of the optical image capturing system.

An optical image capturing system, in order along an optical axis from an object side to an image side, comprising:

• a first lens having positive refractive power;
• a second lens having negative refractive power;
• a third lens having positive refractive power;
• a fourth lens having refractive power, wherein the fourth lens has at least an inflection point on at least one of an object-side surface, which faces the object side, and an image-side surface, which faces the image side, thereof;
• and
• an image plane;
• wherein the lenses within the optical image capturing system consists of the four lenses having refractive power;
• at least two of the lenses from the first lens to the third lens each has at least an inflection point on at least a surface thereof;
• the first lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side;
• both the object-side surface and the image-side surface of the first lens are aspheric surfaces, and both the object-side surface and the image-side surface of the fourth lens are aspheric surfaces;
• wherein the optical image capturing system satisfies:
• 1.8≦f/HEP≦2.0;
• 0.4≦|tan(HAF)|≦3.0;
• 0.5≦HOS/f≦2.5;
• |TDT|<60%;
• |ODT|≦50%;
• and
• 0<Σ|InRS|/InTL≦3;
• where f is a focal length of the optical image capturing system;
• HEP is an entrance pupil diameter of the optical image capturing system;
• HAF is a half of a view angle of the optical image capturing system;
• HOS is a distance along the optical axis between an object-side surface, which face the object side, of the first lens and the image plane;
• TDT is a TV distortion;
• ODT is an optical distortion;
• InTL is a distance between the object-side surface of the first lens and the image-side surface of the fourth lens along the optical axis;
• and Σ|InRS| is a sum of absolute values of a displacement for each lens with refractive power from a central point passed through by the optical axis to a point on the optical axis where a projection of the maximum effective semi diameter ends, wherein Σ|InRS|=InRSO+InRSI while InRSO is a sum of absolute value of the displacement for each lens with refractive power from the central point on the object-side surface passed through by the optical axis to the point on the optical axis where the projection of the maximum effective semi diameter of the object-side surface ends, and InRSI is a sum of absolute value of the displacement for each lens with refractive power from the central point on the image-side surface passed through by the optical axis to the point on the optical axis where the projection of the maximum effective semi diameter of the image-side surface ends;
• wherein the optical image capturing system further satisfies:
• 35 degrees<HAF≦45 degrees.