Abstract: A control for an electric motor for driving the intermittent film drive mechanism in a flying-spot film scanner. The speed and phase of the motor output shaft is sensed and compared with the field-blanking pulses of a television system to bring the speed and phase into a desired relation with the field-blanking pulse rate and the field-blanking pulse time of occurrence. The rotation of the motor output shaft generates pulses at an adjustable rate and phase which can be compared in a comparator with the rate and phase of the field-blanking pulses.

Abstract: This invention relates to an electro-optical system having a red reflecting dichroic mirror arranged to reflect red light to a first photomultiplier through a red-transmitting filter, and to transmit blue and green light to a blue reflecting dichroic mirror arranged to reflect blue light received thereby from the red reflecting dichroic mirror to a second photomultiplier through a series combination of a low pass blue transmitting filter and a high pass blue transmitting filter and to transmit green light. A third photomultiplier being arranged to receive through a green transmitting filter green light received by the blue reflecting dichroic mirror from the red reflecting dichroic mirror. The photomultipliers produce electrical signals representative of the intensity of the light incident on their photocathodes.

Abstract: A film transport has an intermittent drive mechanism with a claw for engaging sprocket holes in a film. The claw is driven by the mechanism to pull the film down frame by frame. Two or more cams are used to cause the claw to carry out a four-sided motion with a fast pull-down action. One of the cams or an additional cam may be provided to render the claw operative to effect pull-down at alternately long and short dwell intervals proportioned to allow scanning of a film frame by different numbers of complete television fields.