METHOD OF IDENTIFICATION OF IMAGE AREAS DISTORTED BY COMATIC ABERRATION, WITH SUBSEQUENT CORRECTION Russian patent published in 2008 - IPC G01M11/02 

FIELD: physics, instruments.

SUBSTANCE: substance of the method is as follows: the image transmitted by the optical system is used to determine the distance from an object point to the principal optical axis of the optical system; the diaphragm radius and the coordinates of the geometric centre of gravity of the point image, in the form of a light spot, are used to determine the diaphragm coordinates and the comatic aberration value, and identify distorted image areas. For the identification of distorted areas, points are searched, so that the brightness distribution function f(x, y) in a given figure would satisfy the value determined experimentally for the optical system when this figure is plotted from these points. The points found are grouped into arrays of points located in distorted areas, and the brightness of the points in the distorted areas is corrected by determining the true brightness of the distorted area points using the formula f_corr ⁼f_cur.-f(x,y), where f_cur. is the current brightness. The technical effect is the increase in the accuracy of the comatic aberration correction.

EFFECT: increase in accuracy of comatic aberration correction.

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