A DUAL WAVELENGTH SCANNING SYSTEM
Original Publication Date: 1982-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
In dual function xerographic type copiers capable of producing copies either through exposure of document originals on thexopier platen or by means of a laser generated flying spot beam scanning across the copier photoreceptor to expose the photoreceptor in accordance with video image signals, a third function may be envisioned; namely, scanning the toner image on the photoreceptor with the flying spot beam and converting the light reflected therefrom to video image signals. This later function depends upon specular or total reflection from the photo-receptor surface of a laser beam. The wavelength of the laser beam is chosen for the second function, i.e., a wavelength suitable to cause the beam to be absorbed by the photoreceptor to cause discharge.