Patent ID: 9063320
Filing Date: 2015-06-23
Classification: G02B

Abstract:
1. A photographic lens comprising: a first lens comprising a convex surface toward an object side and having a positive refractive power; a second lens comprising a concave surface toward an image side and having a negative refractive power; a third lens having a positive refractive power or a negative refractive power; a fourth lens having a positive refractive power or a negative refractive power; a fifth lens comprising a convex surface toward the image side and having a positive refractive power; and a sixth lens comprising a concave aspherical shape with respect to an optical axis toward the image side and having a negative refractive power, wherein the first to sixth lenses are sequentially arranged from the object side to the image side, and wherein the photographic lens satisfies the following equations: in which Yimg indicates a maximum image height in an image plane, BF indicates a length between an image-side surface of the sixth lens and the image plane, and Tan θ indicates a half field of view at the maximum image height.