Patent Document ID: 20140188959
Application ID: 13727787
Patent Flag: 0

Claim One:
1. A method of reconstructing aspheric surface equations in an information processing device from measurements, the method comprising steps for: obtaining z as (r) as a lateral coordinate r varies from r i to r f in steps of r step by measuring a given aspheric surface that is represented by an aspheric surface equation; finding an error curve δz e for each radius of curvature R value while changing R from R i to R f in steps of R step wherein a conic constant K and deformation coefficients are set to 0, wherein the error curve δz e is defined by a deviation of the aspheric surface equation from a quadratic term z s (r) of the aspheric surface equation; finding the deformation coefficients from δz e using an inverse matrix method; replacing R N and a N with each R value and the deformation coefficients found from the δz e in z N , a curve determined by the measured coordinates; checking if a shape error, δz d , is within a predetermined threshold value; and determining R N that is closest to the original R.