Document scanning system with selective edit mode

摘要

A light lens scanning system operable in a document scan mode to reproduce documents onto a photosensitive record medium is modified to operate in a document edit mode. Upon selection of an edit mode, a document is placed face-up on a platen surface by the operator. A laser generated light spot output is introduced into the optical system and is directed along an optical path which is opposite to the optical path of a projected document image. The light spot output is visible to the operator at the platen as a light cursor. This movement of the cursor is placed under control of the operator. The cursor is moved through x and y coordinates to delineate an area of the document to be selectively erased. Coordinate positions are entered into a microcontroller memory. Following exposure of the entire image at the record medium, control means generate signals in response to entered coordinate positions, the signals used to actuate an erase mechanism for a time sufficient to erase the selected portion of the document.