Image pickup lens

摘要

An image pickup lens includes a first lens with positive refractive power having a convex object side surface, an aperture stop, a second lens with negative refractive power having a convex image side surface, a third lens with positive refractive power having a concave image side surface, a fourth lens with positive refractive power having a convex image side surface, and a fifth lens with negative refractive power as a double-sided aspheric lens having a concave image side surface near the optical axis;
wherein the first lens and the second lens satisfy following conditional expressions (1) and (2);
50<ν1<85  (1)20<ν2<35  (2)
where ν1 represents an Abbe number of the first lens, and ν2 represents an Abbe number of the second lens, and where the second lens satisfies a following conditional expression (3);
1.55where Nd2 represents a refractive index of d-ray of the second lens.

主权项

1. An image pickup lens composed of five lenses for a solid imaging element, comprising, in order from an object side to an image side, a first lens having a positive refractive power with a convex surface facing the object side, an aperture stop, and a second lens having a negative refractive power with a convex surface facing the image side;
wherein the first lens and the second lens satisfy following conditional expressions (1) and (2);
50<ν1<85  (1)23.91≦ν2<35  (2)where ν1 represents an Abbe number of the first lens, and ν2 represents an Abbe number of the second lens, and where the second lens satisfies a following conditional expression (3);
1.55 wherein the image pickup lens further comprises a third lens having a positive refractive power with a concave surface facing the image side, a fourth lens having a positive refractive power and having a meniscus shape with a convex surface facing the image side, wherein the third lens and the fourth lens satisfy following conditional expressions (5) and (6);
23.91≦ν3<30  (5)50<ν4<60  (6) where ν3 represents an Abbe number of the third lens, and ν4 represents an Abbe number of the fourth lens, and where the third lens satisfies a following conditional expression (7);
1.5