Technique for recording micropicture-information on a diffractiv

Details Technique for recording micropicture-information on a diffractiv Technique for recording micropicture-information on a diffractiv

1978-04-17

1979-06-05

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 32, 355 71, 355 77, G03B 2700, G03B 2702, G03B 2776

Patent

active

041572203

ABSTRACT:
A group of separate large-size color or black-and-white pictures to be recorded on a master as very finely-screened (e.g. 10 micrometer period) micropictures in a given format, such as microfiche, are first reduced to a continuous-tone first recording at an intermediate size on a medium, such as 70 millimeter film. Then a relatively fine-screened (e.g. 40 micrometer period), high-contrast second recording, made from the first recording by contact printing, is reduced to micropicture size in the given format.

REFERENCES:
patent: 3040640 (1962-06-01), Abel, Jr. et al.
patent: 4003653 (1977-01-01), Kelly
patent: 4018528 (1977-04-01), Dennis
patent: 4076413 (1978-02-01), Smeaton

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