RU2000124479A - METHOD FOR OPTICAL IDENTIFICATION OF OBJECT - Google Patents

Claims (1)

A method for optical identification of an object, which consists in illuminating the identification element of an object with optical probing radiation, projecting its optical image in scattered reflected radiation into the plane of a multi-element photodetector, registering signals from the outputs of the photodetector elements, and forming an optical image of the identification element taking into account similar signals corresponding to that obtained in the same way optical image of a calibration template whose surface has equal dimensional structure, characterized in that the black body is additionally illuminated with optical sounding radiation, signals corresponding to it from the outputs of the photodetector are recorded and the voltage at the output of the nth cell of the photodetector is determined taking into account the signals obtained by illuminating the identification element, a calibration template with a uniform structure and a black body while the distribution of the following relations is used as the optical image of the identification element
K ₀ (n) / K _W = [U _h. (n) -U (n)] / [U _h. (n) -U _w (n)],
where K ₀ (n) is the scattering coefficient of the probe radiation by this section of the identification element;
To _w - the scattering coefficient of the probe radiation by any part of the calibration template;
U _rt (n) is the voltage at the nth cell of the photodetector when registering the probe radiation reflected from the black body;
U (n) is the voltage at the nth cell of the photodetector when registering the probe radiation reflected from the identification element;
U _w (n) is the voltage at the nth cell of the photodetector when registering probe radiation reflected from a calibration template with a uniform structure.