A video system for assessing colour corrections required prior to printing a motion picture negative. Analysers are used to grade a film and record the exposure adjustments.
Later versions are digital and therefore more accurate. Separate controls allow the gain on the RGB channels to be individually adjusted in calibrated steps (equal to one ‘light’) that match the printer’s light output.
After grading, the stored adjustments required for the printer are punched out on a 1” paper tape. These FCC tapes control the printer RGB light valves.
Many new analysers contain a digital frame store with split screen display. This function allows the operator to recall the image from stored memory for comparison to the film being analysed to assure continuity of colour judgement.