Process and apparatus for producing a photographic print

Details Process and apparatus for producing a photographic print Process and apparatus for producing a photographic print

1999-09-08

2000-08-29

Ro, Bentsu

Electricity: motive power systems

Miscellaneous

355 32, 355 54, 353 79, 358401, H04N 1195

Patent

active

061113816

ABSTRACT:
For the production of a photographic print of an original present in electronic format, optical representations (D) are produced from sequentially changing strip-shaped portions of the original by way of an electro optical, pixel wise operating converter device (3) and these optical representations (D) are projected onto a strip-shaped exposure region (E) on the copy material (P), whereby the strip-shaped exposure region (E) and the copy material (P) are moved relative to one another and at an essentially constant speed in a direction transverse to the longitudinal extent of the strip-shaped exposure regions (E), so that successively the image information of the whole original is exposed onto the total available surface of the copy material (P). Each strip-shaped portion of the original is thereby divided into at least two strip-shaped sections positioned one behind the other in longitudinal direction of the portion, separate optical representations are produced from the sections by way of the electro optical converter device (3) and these separate optical representations of the sections are projected onto the copy material (P) in at least two strip-shaped partial exposure regions (E1, E2) which are positioned one behind the other in longitudinal direction and together form the strip-shaped exposure region (E). A digital micro mirror field is preferably used as the electro optical converter device (3). In this manner, large format photographic prints of high quality can be produced with relatively low constructive cost by using conventional converter devices.

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