DOCUMENT SCANNER WITH POSITIONING DEVICE

摘要

A scanner including a charge coupled device (CCD) and an analog-to-digital converter to digitize documents for storage, display and transmission to a remote location has attached to it a positioning device which comprises in the image plane of the document to be scanned a reticle (34) with a site pattern thereon, a lens (31) and a lamp (32) which are used to position a document for scanning. Prior to scanning the document the lamp (32) is briefly energized to project the site pattern onto an easel (18) on which the document is placed, and the portion of the document on which the pattern is projected is the portion that will subsequently be scanned by the scanner in the image plane of the document by the CCD.