Fig.1 Spectral sensitivities of the Chalnicon and other camera tubes in 1972

Spectral sensitivities of the Chalnicon and other camera tubes in 1972

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TV camera tube CHALNICON developed on 1972 had high sensitivity nearly unity quantum efficiency over the visible light region. Figure shows spectral sensitivities of the CHALNICON and other camera tubes used at the time CHALNICON was developed (photoconductive target materials are given in parentheses). Following to the CHALNICON, various high performance or super high sensitivity tubes were developed in Japan. Nowadays camera tubes are changed to solid state devices.

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