Columbia Broadcasting System's scanning room showing the 30 amp. arc with the scanning disc on the front end which scans the image in the adjacent studio, from which the reflected light is picked up by the photo-electric cell and converted into electrical energy. New York, New York: July, 1931. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library |
Taille de l’image : | 4800 px × 3654 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |