An optical scanner including a light emitting device which emits an image-reading light toward an original having an original image thereon, such that the image-reading light scans the original by irradiating each of a plurality of positions on the original at a corresponding one of a plurality of times,...http://www.google.es/patents/US5875043?utm_source=gb-gplus-sharePatente US5875043 - Optical scanner for detecting light intensity from reflected image-reading light
Optical scanner for detecting light intensity from reflected image-reading light
