Patent ID: 7974013

Claim:
An optical lens component, comprising: a fixed diaphragm; a lens group having an optical axis and including a first lens, a second lens, and a third lens; and a filter; wherein: the three lens are coaxial along the optical axis and arranged successively along the optical axis from an object to an image; the fixed diaphragm is located in front of the first lens, and the distance between the edges of said fixed diaphragm and the first lens is greater than or equal to zero; the filter is located behind the third lens such that its front surface faces the object and its back surface faces the image; the first lens has a first surface facing the object and a second surface facing the image; the second lens has a third surface facing the object and a fourth surface facing the image; the third lens has a fifth surface facing the object and a sixth surface facing the image; wherein the six surfaces of the lens group are all aspheric surfaces, and the first surface of the first lens is an arc convex facing the object; the second surface of the first lens is a smooth doliform depression facing the image; the third surface of the second lens is a smooth doliform depression facing the object; the fourth surface of the second lens is an arc convex facing the image; the fifth surface of the third lens is an arc convex facing the object; and the sixth surface of the third lens is a smooth doliform depression facing the image; and wherein the optical lens component is configured to meet the following requirements: 1.15 <L/f< 1.3; 0.8 <f 1/ f< 1.2; f 2<0 and 1.15 <|f 2/ f|< 2.2; and 1.1 <f 3 /f <2.2; wherein: f is the effective focal length of the optical lens component; L is the total length of the optical lens component; f 1 is the effective focal length of the first lens; f 2 is the effective focal length of the second lens; and f 3 is the effective focal length of the third lens.