| 摘要 |
A telecine system comprises a cathode ray tube 2 with a mixed phosphor 6. The phosphor 6 is composed of phosphor components each having a distinct spectral output. Primary photodetectors 16,20,22 are arranged to detect light from the cathode ray tube 2 which has been modulated by a film 10 and produce primary electrical signals including information about the color content of the modulated light. Secondary photodetectors 26a-26c detect unmodulated light from the cathode ray tube 2 and produce secondary electrical signals including information about the color content of the unmodulated light. The primary signals are divided by the secondary signals in a signal processor 28 to compensate for inhomogenities in the mixed phosphor 6.
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