Зависимость величины сигнала от смещения кружка рассеяния объектива в диапазоне углов 0º - 90º относительно центра пиксела фоточувствительной матрицы

Abstract

An algorithm has been developed for calculating the change in the irradiation level of a matrix pixel when the focal spot shifts relative to the center of the matrix pixel in the range from 0 ° to 90 °. Two types of pixel irradiance distribution are considered: distribution in the lens scattering circle in the form of a gaussian rotation and uniform irradiance. Method. The calculation is based on the method of dividing the lens scattering circle on the matrix pixel into separate areas, according to which the irradiance is calculated. The displacement of the lens scattering circle by ∆x along the X axis and by ∆y along the Y axis is taken as normalized to the spot radius. To create a two-dimensional graph of the dependence of the pixel irradiance on the displacement of the lens scattering circle along the X, Y axes, we introduce the transformed relative displacement of the lens scattering circle γ. The main results. An algorithm has been developed for calculating the change in the irradiation level of a matrix pixel when the lens scattering circle is shifted relative to the matrix pixel for two cases of pixel irradiation: the distribution in the lens scattering circle in the form of a gaussian rotation and uniform irradiation. The dependence of the normalized irradiance of the matrix pixel on the transformed relative displacement of the lens scattering circle γ at an angle of 0 °, 30 °, 45 °, 60 °, 90 ° is plotted on the graph for the above cases of irradiation.