On This Day in Telephone History February 20TH 1967 Bell Telephone Laboratories announced a new kind of television camera tube. The new tube used a solid-state silicon “target structure” and provided greater sensitivity to light, higher reliability, and potentially longer life than conventional camera tubes. The new television camera tube was developed for use in future models of AT&T’s Picturephone. A HUMAN hair across a small part of the target structure of the new television camera tube assumes giant proportions when compared with the photodiodes.

On This Day in Telephone History February 20TH 1967

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On This Day in Telephone History February 20TH 1967 Bell Telephone Laboratories announced a New Kind of Television Camera Tube. The new tube used a solid-state silicon “target structure” and provided greater sensitivity to light, higher reliability, and potentially longer life than conventional camera tubes. The new television camera tube was developed for use in future models of AT&T’s Picturephone. A HUMAN hair across a small part of the target structure of the new television camera tube assumes giant proportions when compared with the photodiodes.