CPC G02B 13/008 (2013.01) [G02B 9/64 (2013.01); G02B 13/0045 (2013.01); H04N 5/33 (2013.01)] | 14 Claims |
1. 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;
an aperture;
a second lens having negative refractive power;
a third lens having refractive power;
a fourth lens having refractive power;
a fifth lens having positive refractive power;
a sixth lens having positive refractive power;
a seventh lens having negative refractive power; and
an image plane specifically for infrared light;
wherein the optical image capturing system has a total of the seven lenses with refractive power; each lens among the first lens to the seventh lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side; wherein the object-side surface of the first lens is a convex surface, and the image-side surface of the first lens is a concave surface; the image-side surface of the second lens is a concave surface; the object-side surface of the fourth lens is a convex surface, and the image-side surface of the fourth lens is a concave surface; the object-side surface of the fifth lens is a convex surface, and the image-side surface of the fifth lens is a concave surface; the image-side surface of the seventh lens is a concave surface;
wherein the optical image capturing system satisfies:
0.5≤f/HEP≤1.0;
IN56>IN23;
IN56>IN34;
IN56>IN45;
20.5346 deg<HAF≤30.7306 deg; and
0.9≤2(ARE/HXP)≤2.0;
wherein f is a focal length of the optical image capturing system; HEP is an entrance pupil diameter of the optical image capturing system; HXP is an exit pupil diameter of the image-side surface of the seventh lens; HAF is a half of a maximum field angle of the optical image capturing system; for any surface of any lens, ARE is a profile curve length measured from a start point where the optical axis passes therethrough, along a surface profile thereof, and finally to a coordinate point of a perpendicular distance where is a half of the exit pupil diameter away from the optical axis; IN23 is a distance on the optical axis between the second lens and the third lens, IN34 is a distance on the optical axis between the third lens and the fourth lens, IN45 is a distance on the optical axis between the fourth lens and the fifth lens, and IN56 is a distance on the optical axis between the fifth lens and the sixth lens.
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