Instant pix from tiny TV tube (Jun, 1970)
Instant pix from tiny TV tube
Shown here actual size, these two photos are part of a picture sequence made by contact printing quick-copy photographic paper (in a perforated roll) with a new and remarkable TV tube. Made by Panasonic, the 1.5-inch miniature cathode-ray tube has a fiber-optics face plate and a high-resolution electron gun, yielding pictures of 300-350 lines resolution. To print ordinary TV pictures, silver halide paper in contact with the fiber-optics tube face is exposed to light from the screen phosphors during the scanning period of a single frameâ€” 1/30 second. The processing time is about 15 seconds. Video printer will be used to make pictures from closed-circuit TV (as here), broadcast TV, computer outputs, and specialized sources.