Dynamic Spot Formation in Color Tubes
Based on a former investigation, the dynamic spot formation and its size-reducing property during scan are visualized for square- and circle-shaped beam spots. While the feedback-type color tube systems require a priori an extremely small spot, the grid-focusing and the masking systems can utilize conventional spot sizes because of additional short-range focusing facilities and beam-shaping external to the electron gun. Alternative modes of operation with different scan-to-grid relations in the Lawrence color tube system are critically investigated. An optimum spot size condition is found when operated with wire-parallel scan and with a high grid-deflection rate which also removes the moiré effect.
- Print ISSN
- 0361-4573
- Published
- 1960-10
- Content type
- Original Research
- DOI
- 10.5594/J09405
Download the PDF
or become a SMPTE member today to access the
article.
Become a SMPTE
member today to access the article.