HIGH RESOLUTION CATHODE RAY TUBE
Abstract
The general design and construction detail are presented of a 5 in. diameter ultra high resolution CRT yielding a spot of .0005 in. diameter at the half power points with a beam current of 5 microamperes. It is shown that the performance achieved is almo t certainly being limited by aberrations in the final lens systemAND/OR BY THE SCREEN GRAIN STRUCTURE. There is reason to feel that a spot diameter of about 0.2 mil may be o tainable simply by substituting an evaporated phosphor and a larger final lens system. It discusses the design of elaborate test equipment, using the principle of slit scanning, to measure these spot sizes accurately. A general theory is developed of narrow angle cathode ray tube de ign which is applicable to any similar problem. This theory is applied to study the limitations in cathode ray tube performance set by the maximum permissible cathode loading, by the beam space charge, by deflection defocussing, and by constructional difficulties. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1962
- Accession Number
- AD0291824
Entities
People
- E. Atti
- H. Moss
Organizations
- Westinghouse Electric Corporation