Original Publication Date: 1982-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
The disclosure relates to a photocopying system which includes a screening circuit for analyzing an initially exposed image and modifying the initial exposure to vary the micro gray level density. Referring to the figure, a scanning system (not shown) has illuminated and scanned an original document and reflected light is directed toward photoreceptor drum 10 exposing the drum through slit 12 in image-wise fashion. A portion of this reflected light image is intercepted by mirror 14 and reflected to CCD array 16 via fiber optics pipe 18. The output of array 16 is analyzed by control circuit 20 and a signal corresponding to the micro gray density of the scanned document controls the operation of A 0 modular 22. A scanning beam from HeNe laser 24 then has impressed upon it the scanning information contained in the signal from circuit 20. The laser writes this information onto drum 10, line by line via galvometer 26.