Patent ID: 7830617
Filing Date: 2010-11-09
Classification: G02B

Abstract:
1. An optical component comprising: at least a first aspherical refractive surface, wherein the first aspherical refractive surface constitute a part of a boundary between a first medium having a refractive index n a first curve is defined as a collection of intersections between the x-z plane of a rectangular coordinate system and the first aspherical refractive surface, wherein the origin of the rectangular coordinate system is located within the second medium, and the z-axis of the rectangular coordinate system passes through the origin and a point on the first aspherical refractive surface, the said first curve is symmetric about the z-axis, a distance from the origin to a first point on the first curve with a zenith angle θ is r(θ), rectangular coordinates (x, z) and polar coordinates (θ, r) of the first point in the x-z plane satisfy relations given in Eqs. 1 and 2, the distance r(θ) is given as Eq. 3, said θ said r(θ said δ is an arbitrary function of the zenith angle θ of the first point (δ=δ(θ)), and the zenith angle θ ranges from a minimum θ