Importance

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Abstract

An optical imaging system (18) radiates a light image of an original document (13) onto a photoconductive drum (16) to form a first electrostatic image. The light image is also focussed on a photosensor array (44) which produces electrical signals corresponding thereto. These signals are fed through a contour compensation circuit (49) which increases the contrast at the black-white transition points of the image and thereby at the contours of the image areas. The contour compensated signals are radiated by an array of light emitting elements (46) onto the drum (16) to form a second electrostatic image which is superimposed on the first electrostatic image. The result is an increase in the apparent resolution of a copy or reproduction produced by applying toner to the drum (16) to form a toner image and transferring and fixing the toner image to a copy sheet. The arrays (44) and (46) may be used separately for facsimile transmission and reception respectively.

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First Claim