ACOUSTOOPTICAL RECEIVER-FREQUENCY METER Russian patent published in 2002 - IPC

FIELD: radio measurement technology. SUBSTANCE: invention can be recommended in the capacity of high-precision receiver-frequency meter operating automatically. Acoustooptical receiver-frequency meter has laser, collimator, linear acoustooptical deflector with ultrasonic column excited in its body by input radio signal on which laser radiation falls at negative or positive Bragg angle, first integrating lens and first strip of photodetectors with parallel output positioned in sequence in path of light. Acoustooptical receiver-frequency meter is supplemented in direction of laser beam of zero order with re-reflecting mirror placed after acoustooptical deflector which secures repeat fall of light on ultrasonic column of acoustooptical deflector at negative or positive Bragg angle and in direction of repeatedly diffracted light with second integrating lens and second strip of photodetector positioned in turn which like outputs are connected to like outputs of first strip of photodetectors correspondingly. EFFECT: increased precision of measurement of frequency of radio signals. 7 dwg