Optical system for providing visual aid for proper magnification

Details Optical system for providing visual aid for proper magnification Optical system for providing visual aid for proper magnification

1979-05-24

1981-01-13

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Focus or magnification control

355 44, G03B 2752

Patent

active

042446490

ABSTRACT:
In a full-frame, copying system, translucent registration guides along the edges of a platen area provide an operator with an indication of which portion of a document overlying the platen will be copied onto selected copy paper at the particular magnification ratio selected. Illumination sources located on the image side of a projection lens create line images which are projected through the lens to illuminate appropriate registration guides corresponding with the particular magnification ratio.

REFERENCES:
patent: 2095815 (1937-10-01), Hopkins
patent: 3395610 (1968-08-01), Evans et al.
patent: 3848996 (1974-11-01), Goding
patent: 4105327 (1978-08-01), Gibson et al.

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