A laser beam printer includes a movable mirror which is rotated by a scan mirror motor. Laser light is alternately deflected toward an information reading station and an information writing station by applying the laser light to the movable mirror from a semiconductor laser. The laser light is switched...http://www.google.es/patents/US5537214?utm_source=gb-gplus-sharePatente US5537214 - Reading and writing apparatus with rotating mirror
Reading and writing apparatus with rotating mirror
