Patent ID: 7355615
Filing Date: 2008-04-08
Classification: B41J,G02B

Abstract:
1. An optical scanning apparatus for scanning a recording medium with laser light beam and exposing said recording medium to said laser light beam to record a latent image on said recording medium, comprising: a laser light source which generates said laser light beam; an optical modulator which is disposed on an optical path between said laser light source and said recording medium and is used to modulate said laser light beam; a reducing filter which has a light amount reducing function for reducing light amount of said laser light beam using absorption or reflection of said laser light beam and is disposed on said optical path of said laser light beam between said laser light source and said optical modulator; at least one reflection optical element disposed on said optical path of said laser light beam; and at least one transmission optical element disposed on the optical path of the laser light beam, wherein, when transmittance of said reducing filter is given by η is satisfied.