Patent ID: 9638898
Date: 2017-05-02
CPC Classifications: G02B

Claim:
1. An image pickup lens for use with a solid imaging element, the image pickup lens comprising, in order from an object side to an image side: a first lens having a positive refractive power, a second lens having a meniscus shape and a negative refractive power, a third lens having a positive refractive power, a fourth lens having a meniscus shape, a negative refractive power and a concave surface facing the image side near an optical axis, and a fifth lens having both sides formed as aspheric surfaces and a positive refractive power; wherein an F-value of the image pickup lens is 2.41 or smaller, and satisfies an expression (8): where f represents a focal length of the overall optical system of the image pickup lens, and f4 represents a focal length of the fourth lens.