METHOD FOR MEASURING COORDINATES OF IMAGE OF POINT LIGHT SOURCE Russian patent published in 1994 - IPC

FIELD: optical methods of measuring. SUBSTANCE: prior method for measuring coordinates is used which involves photoelectric conversion of image, generation of video signal, calculation of constituent coordinate of light source by coordinate of photodetector. This method was extended due to calculation of maximal amplitude of signal by sliding addition of source array of video signal pixels. Second constituent of image coordinates is calculated by equation where h is value of inter-pixel step, Δh is pixel size, U_i is value of signal from i-th pixel from source array, i_max is index of pixel having maximal amplitude of signal. EFFECT: increased precision of measuring when signal-to-noise ratio is low. 2 dwg