Full-frame illumination system for a document reproduction devic

Details Full-frame illumination system for a document reproduction devic Full-frame illumination system for a document reproduction devic

1984-08-03

1986-02-04

Hix, L. T.

Photocopying

Projection printing and copying cameras

Illumination systems or details

362346, 362343, G03B 2754

Patent

active

045681791

ABSTRACT:
A two-dimensional full-frame illumination assembly is formed, in a preferred embodiment, by coupling light into the edges of a document platen which has been modified by applying a white segment pattern to the bottom platen surface. The coupled light is totally internally reflected within the platen body except for the area covered by the segment pattern. Light encountering the segments is reflected upward towards the document support surface to provide the required document illumination. The light reflected by the document passes back through the screen segment pattern and is projected by a conventional lens or a full-frame, two-dimensional, short focal length lens array onto a photosensitive surface such as a photoreceptor belt.

REFERENCES:
patent: 3132810 (1964-05-01), Ostensen
patent: 3192842 (1965-07-01), Heiss
patent: 3635557 (1972-01-01), Alderton
patent: 3697177 (1972-10-01), Booth
patent: 3912510 (1975-10-01), Marks
patent: 4333723 (1982-06-01), Green et al.

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