Exposure device and method for compensating optical defects

Photocopying – Projection printing and copying cameras – Illumination systems or details

Reexamination Certificate

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Details

C355S053000, C359S237000, C359S291000

Reexamination Certificate

active

06844920

ABSTRACT:
An exposure device for exposing a projection of an electronically stored artwork pattern onto a substrate, in particular a printing plate1,with image processing electronics (2) that can store the image data, with a light modulator (7) that can be electronically controlled by the image processing electronics (2), in particular an LCD display (7) or a micro-mirror device, with an illuminating device (8, 9) for illuminating the light modulator (7), and with a projection lens (11) for projecting the light modulator (7) onto the substrate (1), is improved according to the invention in that the image processing electronics (2) include a compensation device (4, 5) to compensate for optical defects and/or tolerances in the beam path of the exposure device.

REFERENCES:
patent: 5369499 (1994-11-01), Yip
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patent: 38 13 398 (1989-11-01), None
patent: 198 45 821 (1997-06-01), None
patent: 197 03 063 (1998-08-01), None
patent: 0 875 386 (1998-11-01), None
patent: 0 953 877 (1999-11-01), None

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