Reproducing camera focus control method

Details Reproducing camera focus control method Reproducing camera focus control method

1984-01-25

1988-08-30

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 77, 355 53, G03B 2734, G03B 2740

Patent

active

047680679

ABSTRACT:
A method for correcting the focus at plural image positions in a reproducing camera system in which plural images are to be formed on a photosensitive material, the supporting base for which can vary in flatness from position to position. Prior to exposure of the photosensitive material, values are stored in a memory for each image position indicative of the amount of deviation of that position from a reference flat position. For the exposure of each image position, the corresponding value is read out and applied to an automatic lens positioning system to thus correct the focus for each image position.

REFERENCES:
patent: 3704657 (1972-12-01), Sliwkowski et al.
patent: 3735686 (1973-05-01), Brewer et al.
patent: 3832058 (1974-08-01), Gusovius
patent: 4021115 (1977-05-01), Jeppesen

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