Patent ID: 9316816
Filing Date: 2016-04-19
CPC Classification: G02B

Claim Text:
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, a second lens having a negative refractive power, a third lens as a meniscus lens with a concave surface facing the image side, a fourth lens as a meniscus lens with a convex surface facing the image side, and a fifth lens having both sides formed as aspherical surfaces and having a negative refractive power with a concave surface facing the object side and the image side near an optical axis; wherein conditional expressions (9) and (12) below are satisfied: where r3 represents a curvature radius of an object-side surface of the second lens, r4 represents a curvature radius of an image-side surface of the second lens, f represents a focal length of the overall optical system of the image pickup lens, and f2 represents a focal length of the second lens.