Patent · US Expired

Method and apparatus for copying transparencies to light-sensitive material

US6118513A · kind A · utility

3Cited by

7References

10Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Paul Delabastita · Boston, US
Gunter Findeis · Sauerlach, DE
Manfred Fürsich · Taufkirchen, DE
Josef Moseler · Biessenhofen, DE

Key dates

Filing date	Sep 30, 1998
Grant date	Sep 12, 2000
Priority date	—
Expiry date	Sep 30, 2018

Classification

Technology area (CPC H)Electricity
CPC primaryH04N1/4052
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The invention relates to a method and an apparatus for copying transparencies to a light-sensitive material, the apparatus including an illuminator for illuminating the original, wherein the illuminator has a plurality of individually addressable pixels which can be switched to light or dark and which are controlled according to a raster image. The density values of the original are first determined with a predetermined spatial and gray-scale resolution and the raster image is subsequently generated from the density values of the original according to the error diffusion method.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.