method for einflußminderung of leuchtschichtfehlern for reproduction of crt tubes

摘要

On the CRT are formed sequential points and finitely large lines along a single imaging line, located always at the same position. The points and lines are focussed onto a photosensitive material by an objective lens. Between the CRT and the material takes place a translation movement. Instead of a single, useful illumination point line on the CRT, a cyclically repeatable group (0.7) of sequential strokes and pixels can be reproduced on the CRT (20, 22). They are of definite size and sequentially energisable in coincidence with the translation movement and the point to be illuminated on the photosensitive material. USE/ADVANTAGE - For photo typesetting machines. Improved CRT service life. No need for pre-testing, tubes with faults can be used, multiple strokes can be used.