Click to open image viewer. CC0 Usage Conditions ApplyClick for more information. In 1927 inventor Philo T. Farnsworth designed and made this television transmission tube that he called an "image ...
He painted a glass square black and scratched a straight line across the center. A slide dropped between a cold cathode-ray tube (called the "Image Dissector") and a hot, carbon-arc lamp. When the ...
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