Patent ID: 9354424
Filing Date: 2016-05-31
CPC Classification: G02B

Claim Text:
1. An optical module having an object side and an image side; the module comprising, from the object side to the image side: a first positive meniscus lens having a focal length F a second positive meniscus lens having a focal length F the four surfaces having their curvatures defined by the equation: and the parameter where: i is the surface number (i=1 to 4); for the i-th surface, Zi is the distance between a point on the aspheric surface at the height of Yi above the optical axis and a plane tangent to the aspheric surface at the intersection of this surface with the optical axis; Ki is a constant called the conic constant of the i-th surface; CURVi is the curvature of the i-th surface at the intersection of this surface with the optical axis; Ai, Bi, Ci, Di, are, respectively, the aspheric coefficients of the 2 Ri is the effective radius of aperture of the i-th surface; the module being characterized in that the following relations are satisfied: