Patent ID: 9069153
Filing Date: 2015-06-30
Classification: G02B

Abstract:
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 wherein the module is capable of operating with a light sensor arranged after the second lens on the image side; the convergence of the second lens being chosen such that the light rays coming out of the second lens meet the sensor with an incidence angle of 29 degree or less.