METHOD OF RESTORING THE SHAPE OF THE ASPHERICAL SURFACE OF AN OPTICAL PART BASED ON THE PARAMETERS OF THE REFLECTED WAVEFRONT, OBTAINED BY INSTRUMENTS WITH WAVEFRONT SENSORS (WFS) Russian patent published in 2020 - IPC G01B11/02 G01B11/255 

FIELD: manufacturing technology.

SUBSTANCE: method of restoring the shape of the aspherical surface of an optical part based on parameters of the reflected wave front involves obtaining a radius of the nearest sphere R_z and a wave front of spherical shape W_s(ρ). In the initial setting position for the measured aspherical optical part, characterized by obtaining the autocollimation ray path, controlled by obtaining a flat wave front on the wavefront sensor (WFS), differences of wave front from nearest sphere W_as(ρ) are fixed ρto calculate coefficients of equation of aspherical surface of specified order by minimizing difference of this equation and sum of spherical wave front W_s(ρ) and half of value W_as(ρ), i.e.

where A₄, A₆, A₈, … are coefficients of the corresponding order of aspherics, k is a conical constant, ρ is a radial coordinate on the pupil, and R is the radius of the vertex sphere.

EFFECT: possibility of recovering the shape of the aspherical surface of the optical part based on the parameters of the reflected wave front.

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