Patent ID: 6341030
Filing Date: 2002-01-22
Classification: G02B

Abstract:
A light beam optical scanner, comprising:a light source that emits a light beam; a deflector having a plurality of deflecting facets that have widths smaller than a width of the light beam, at least two of the deflecting facets being irradiated by the light beam and deflecting the light beam; an optical element that is disposed so that a deflected light beam is applied to the optical element, the deflected light beam being a beam that has been deflected by one of the deflecting facets, the optical element being one of a first optical element through which the deflected light beam passes and a second optical element that reflects the deflected light beam, an incident angle of the deflected light beam applied to an incidence plane of the optical element changing according to an angle of deflection at which the deflecting facet has deflected the light beam; and a thin film with which at least one of an incidence plane of the first optical element, an incidence plane of the second optical element, an emission plane of the first optical element, and the deflecting facet is provided, reflectance and transmissivity of the thin film depending on the incident angle.