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P-28 Phototube

P-28 Phototube

C003/3672

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Credit

CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY

Caption

Phototubes are a gas-filled or vacuum tube with extreme sensitivity to light. One major use was reading optical sound tracks for projected films until photoresistors and photodiodes were developed.

Release details

Model release not required. Property release not required.

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