The CRT in phototypesetting systems

Rapidity and flexibility in photo-offset printing are synonymous with computer-driven CRTs. Yet, designing such a system has its problems. One big consideration is beam deflection linearity. Another is resolution. Reproduction accuracy resolved, design alternatives remain: Should the CRT be step-scanned or scanned continuously (as for television)? How much of the tube should be used? What should the absolute motion of the film be with respect to the generated motion of the characters? Naturally, there are tradeoffs.