Exposure control system for photocomposition machines

Details Exposure control system for photocomposition machines Exposure control system for photocomposition machines

1976-02-03

1977-09-06

Adams, Russell E.

Photocopying

Projection printing and copying cameras

Illumination systems or details

354 5, 354 7, 354 12, 354 15, G03B 2776

Patent

active

040464750

ABSTRACT:
In photocomposition, when change in point size is made, rather than change iris opening, a programmable flash intensity provides the required irradiance. Iris setting is made only to compensate for film or paper sensitivity, flash lamp efficiency, and energy storage capacitor variations.

REFERENCES:
patent: 3590705 (1971-07-01), Moyroud
patent: 3748036 (1973-07-01), Ogawa
patent: 3815992 (1974-06-01), Ogawa

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