Optical correlator and optical correlation methods for adaptive matching

摘要

(57) Abstract The optical correlator of the improved which uses the coherent light beam, uses be adapted adjustable method. Test pattern, modulates the input spatial optical modulator. As for the filter spatial optical modulator, it is modulated simultaneously making use of the frequency domain standard which is converted to independence as for the beam which is modulated, passing the passive conversion optical element, being spread, reaching up to the filter spatial optical modulator. The light due to the standard which is converted to independence result correlation or agreement of the pattern which is modulated is processed, causes the feedback signal which shows the optical unconformity of the optical correlator entirely. Driving the beam deflection vessel, it compensates this feedback signal, by adjusting the route of the coherent beam, improves the optical adjustment of the correlator and maintains.