Optical illumination device for use in copying machine

Details Optical illumination device for use in copying machine Optical illumination device for use in copying machine

1974-07-22

1976-03-30

Sheer, Richard M.

Photocopying

Including fiber optics

240 411, 240 4135C, 240103B, 355 67, 355 1, G03B 1528, G03B 1532

Patent

active

039471152

ABSTRACT:
An optical illumination device for use in a copying machine, which illuminates the original to be copied, with a ribbon of light. The optical illumination device comprises a pair of reflectors respectively having concave, reflective surfaces which comprise individual portions of hollow right elliptical cylinders of different ellipticity. Each of these first and second elliptical cylinders has a pair of line foci and the first and second reflectors are arranged such that one of the line foci of the first elliptical cylinder is substantially in alignment with one of the line foci of the second elliptical cylinder. A line light source is disposed in alignment with the other focus of the first elliptical cylinder while the other focus of the second elliptical cylinder is situated in the vicinity or at a position where the original to be copied is placed.

REFERENCES:
patent: 2819649 (1958-01-01), McLeod et al.
patent: 3088023 (1963-04-01), Ayroldi
patent: 3302519 (1967-02-01), Young
IBM Technical Disclosure Bulletin, Vol. 14, No. 11, Apr., 1972, Baxter et al., "Document Illuminator...".

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