IMAGE IDENTIFYING DEVICE Russian patent published in 2000 - IPC

FIELD: optical image-identifying devices. SUBSTANCE: device has first lens and image conversion unit with optically coupled optical divider, second lens, first semi-reflecting mirror, light conductors, first light filter, second semi-reflecting mirror, and second light filter; it also has third lens, photodetector unit, signal spectrum analyzer, comparison unit, standard signal setting unit, decision unit, as well as transfer signal shaping unit, light-beam deflecting unit, and third light filter. Installed in front of image conversion unit are series- connected additional photodetector unit, image shaping unit, porous silicon covered screen, and fourth lens optically coupled with optical divider input that functions as optical input of image conversion unit; additional photodetector unit is optically coupled with first lend that functions as optical input of device. EFFECT: improved noise immunity and image identification reliability. 4 dwg