Patent ID: 9389395
Filing Date: 2016-07-12
CPC Classification: G02B

Claim Text:
1. An imaging lens in which elements are arranged in order from an object side to an image side, comprising: an aperture stop; a first lens with positive refractive power having a convex surface on the object side and the image side; a second lens with negative refractive power having a concave surface on the image side; a third lens with positive refractive power as a meniscus lens having a convex surface on the image side; and a fourth lens with negative refractive power as a double-sided aspheric lens having a concave surface on the image side, wherein an F-value is smaller than 2.4; and conditional expressions (1) (2 where ih: maximum image height f: focal length of an overall optical system of the imaging lens TLA: distance on an optical axis from an object-side surface of an optical element located nearest to an object to an image plane without a filter or the like r r