Optical image capturing system

摘要

An optical image capturing system, from an object side to an image side, comprises a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element. The first lens element has a positive refractive power and may have a convex object-side surface. The second through fifth lens elements has a refractive power and the object-side and image-side surfaces of these lens elements are aspheric. The sixth lens element has a negative refractive power and a concave image-side surface. The object-side surface and the image-side surface are aspheric, and at least one of the two surfaces has inflection points. The first through sixth lens elements has a refractive power. When specific conditions are satisfied, the optical image capturing system may has a large aperture value and a better optical path adjusting ability to acquire better imaging quality.

主权项

1. An optical image capturing system, from an object side to an image side, comprising:
a first lens element with a positive refractive power; a second lens element with a refractive power; a third lens element with a refractive power; a fourth lens element with a refractive power; a fifth lens element with a positive refractive power; a sixth lens element with a negative refractive power and at least one of an image-side and an object-side surfaces of the sixth lens element having at least one inflection point; and an image plane; wherein the optical image capturing system comprises the six lens elements with refractive powers, at least one of the second through fifth lens elements has a positive refractive power, an object-side surface and an image-side surface of the first lens element are aspheric, an object-side surface and an image-side surface of the sixth lens element are aspheric, focal lengths of the first lens through sixth lens elements are f1, f2, f3, f4, f5 and f6, respectively, a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is HEP, half of a maximal view angle of the optical image capturing system is HAF, a distance from the object-side surface of the first lens element to the image plane is HOS, and the following relation is satisfied: 0≦|f/f1≦2, 1.2≦f/HEP≦2.8, 0.4≦|tan(HAF)|≦1.5 and 0.5≦HOS/f≦2.5.