Patent ID: 8902517
Filing Date: 2014-12-02
Classification: G02B

Abstract:
1. An image capturing lens substantially consisting of a first lens having a negative power, a second lens having a positive power, a third lens having a negative power, a fourth lens having a positive power, and a fifth lens having a positive power, arranged in this order from the object side, wherein: the image side surface of the fifth lens has an aspherical shape with one or more inflection points and a concave shape toward the image side in a paraxial region; and the image capturing lens satisfies the following conditional expressions (1a), (2a), (3a), and (4a) simultaneously: where: TL is an overall optical length when a distance from the image side surface of the fifth lens to the image plane is represented by an air equivalent length; f is a focal length of the entire lens system; f1 is a focal length of the first lens; Dg N2 is a refractive index of the optical member constituting the second lens; and N3 is a refractive index of the optical member constituting the third lens.