SERVOSYSTEM Russian patent published in 1994 - IPC

FIELD: optic-location devices. SUBSTANCE: difference signal is measured which have been received from outputs of coordinate-sensitive photodetector 1. Servosystem has coordinate-sensitive photodetector 1 mounted onto tracking platform 2. Signal from output of coordinate-sensitive photodetector 1 enters control inputs of tracking platform 2 through log amplifiers 4, 5, subtracter 6 and commutator 11. Each processing channel has delay circuit 15 connected in series with switches 12, 13 and memory unit 17. Due to these unit the value of mismatch of tracking system is memorized in steady mode. Selection channel is also brought into the device which has delay circuit 14, switch 10, memory unit 16, subtracter 7, threshold unit 18 and amplifier 19. This channel provides tracking after useful object in case if outside objects are observed in field of view. EFFECT: improved noise immunity of tracking system. 1 dwg