Patent ID: 6049409
Filing Date: 2000-04-11
Classification: G02B

Abstract:
An optical scanning device comprising:a light source for emitting a light beam;a polygon mirror for receiving the light beam and reflecting the light beam at most one, the light beam being reflected while being moved in a fast scan direction with the rotation of said polygon mirror; anda reflecting member having a reflecting surface, said reflecting surface receiving the light beam from said light source and reflecting the light beam towards said polygon mirror, the light beam reflected by said reflecting surface being directed to the axis of a rotary shaft of the polygon mirror and obliquely incident on each facet of said polygon mirror from a point outside a plane that is perpendicular to the rotary shaft of said polygon mirror and passes through a point where the light beam is reflected by said polygon mirror, and said reflecting surface of said reflecting member receiving the light beam reflected by each said face of said polygon mirror and reflecting again the received light beam.