Patent ID: 7251067
Filing Date: 2007-07-31
Classification: G02B,H04N

Abstract:
1. An optical scanning apparatus comprising: light source means having a light emitting portion emitting a light beam; light beam deflecting means; an imaging optical system for causing the light beam deflected by the light beam deflecting means to be imaged into a spot shape on a surface to be scanned; and a plurality of mirrors provided in an optical path between the light beam deflecting means and the surface to be scanned, wherein the plurality of mirrors include a first mirror and a second mirror, a reflectance of the first mirror for the light beam reflected on the first mirror is 90% or less and the reflectance of the first mirror for the light beam changes from an on-axis to an off-axis, and a reflectance of the second mirror for an on-axial ray is larger than a reflectance of the first mirror for the on-axial ray and the reflectance of the second mirror for the on-axial ray is equal to a reflectance of the second mirror for an off-axial ray.