RESEARCH AND DEVELOPMENT OF HIGH-BRIGHTNESS PROJECTION KINESCOPES.
Final rept. May 64-Apr 67,
RAYTHEON CO QUINCY MASS INDUSTRIAL COMPONENTS OPERATION
Pagination or Media Count:
In a preliminary phase of study and experimentation, a number of luminescent materials were investigated to provide a basis of selection of a phosphor for subsequent application in a high-brightness projection cathode-ray tube. Utilizating the principle of forced-cooling of the phosphor substrate to limit the thermal contribution to brightness saturation, a projection tube was developed having an angled neck, an ion-trap tetrode gun, and a clear glass optical window situated parallel to a liquid-cooled metal baseplate on which the phosphor screen was deposited. Three models of this tube were constructed. Measurements showed the tube capable of providing an acceptable quality projection television display of 9 ft. Lamberts brightness in a 3 ft. x 4 ft. image, using an f1.2 lens and viewing screen having a gain of 2. Tube life was found to be in excess of 500 hours of operation with continuous, intense, full-raster bombardment, resulting in less than 50 reduction in luminous efficiency. Author
- Electrooptical and Optoelectronic Devices
- Manufacturing and Industrial Engineering and Control of Production Systems