FLYING SPOT SCANNING APPARATUS

摘要

A flying spot scanning apparatus including a laser (20) and a multifaceted rotating polygon or pyramid (44) as the scanner. In particular, a beam of light (34) such as that generated by a laser beam, is directed onto a first facet (42) of the scanner. This beam is expanded and reflected back to the same facet (42) or any other facet (46) on the scanner by optical means (50) positioned adjacent the scanner so that the beam is caused to follow the facet of the scanner upon which the beam is reflected during a complete scan and to shift to the next facet for the following scan.