CPC G02B 13/0045 (2013.01) [G02B 9/62 (2013.01); G02B 27/0025 (2013.01)] | 23 Claims |
1. An optical image capturing system, from an object side to an image side, comprising:
a first lens with negative refractive power, with an object-side surface being concave and an image-side surface being concave;
a second lens with negative refractive power, with an object-side surface being concave;
a third lens with positive refractive power;
a fourth lens with positive refractive power;
a fifth lens with positive refractive power;
a sixth lens with negative refractive power; and
an image plane;
wherein the optical image capturing system comprises six lenses made of plastic, focal lengths of the first lens through the sixth lens are f1, f2, f3, f4, f5 and f6, respectively, and a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is denoted by HEP, a distance on the optical axis from an object side of the first lens to the image plane is denoted by HOS, a half maximum angle of view of the optical image capturing system is denoted by HAF, with a starting point on any surface of any one of the six lenses at the optical axis and a coordinate point on the same surface of a vertical height of ½ HEP measured from the optical axis, a length of an outline curve along the surface from the starting point to the coordinate point is denoted by ARE, and the following conditions are satisfied:
1.0≤f/HEP3.0; 50 deg<HAF≤70 deg; 0.5≤HOS/f≤5; and 0.92≤(ARE/HEP)≤2.0.
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