Patent ID: 7034972
Filing Date: 2006-04-25
Classification: G02B

Abstract:
1. An optical scanning device comprising: light source means; an optical deflector; an incident optical system that causes a light beam emitted from the light source means to be entered to a deflection surface of the optical deflector in a state where the light beam has a larger width than a width in a main scanning direction of the deflection surface; an imaging optical system that images the light beam reflectively deflected by the optical deflector onto a surface to be scanned; and a slit member that restricts a diameter of the light beam in a sub-scanning direction and is provided within an optical path between the optical deflector and the surface to be scanned, wherein a difference between peak intensities of spots of the light beam with which the surface to be scanned is scanned becomes ±10% or less in an entire effective scanning region.