Film scanning system for TV camera - uses oscillating mirror and strip sensor with red, green and blue diodes for each picture point

摘要

The appts. is used for the electronic scanning of colour films for projection onto a TV screen. The appts. comprises a film illumination and drive system (1) and oscillatory mirror system (2) including an oscillatory coil (S) for deflecting the image in the direction of film transport. A picture sensor (3) is arranged in the image plane and includes a charge coupled device having a line of photosensitive diodes and an analog register responsive to the diodes. For each picture point, there are three diodes sensitive respectively to red, green and blue. The output of the sensor (3) is connected through deconding logic (8) to an encoding unit (13) which produces a conventional FBAS video signal. The coil (S) is driven by a sawtooth voltage onto which is superimposed a large positive pulse for providing flyback acceleration and a large negative pulse for subsequent retardation.