COHERENT-OPTICAL ANALYZER OF PICTURE SPECTRUM Russian patent published in 1997 - IPC

FIELD: optical information processing. SUBSTANCE: transparency of device is designed as infinite tape which stores combinations of serial, parallel or parallel-serial alternating sine lattices with different three-dimensional frequencies ν_n. Sides of tape are equipped with information track 27 which is designed as code strips 28 which have given length and carry information about space-time characteristics of sine lattices and their combination on some piece of transparency. Receiver-recorder of device has first and second photodetectors 23, 25, differentiating unit 24, analog-to- digital converter 17, digital-to-analog converter 18, microprocessor 20, control unit 14, power amplifier 21. Recording channel has light flow intensity regulator 3. There are feedback circuits for generation of test image (recording, processing, control of movement speed and intensity of recording light) and for information circuit between controlled characteristics of test image and detected characteristics of its Fourier spectrum. EFFECT: increased functional capabilities. 2 dwg