Patent ID: 7283288
Filing Date: 2007-10-16
Classification: G02B

Abstract:
1. A scanning device, comprising: a light source unit that emits a light beam; a collection optical system that converges the light beam emitted by the light source unit; a deflector that deflects the light beam converged by the collection optical system; an image forming optical system that converges the light beam deflected by the deflector onto a scan target surface to form a beam spot scanning in a main scanning direction, wherein the scanning device satisfies a following condition: where y y′ y y′ y y′ y y′ θ represents an angle formed between the optical axis and a chief ray of the light beam proceeding, immediately after deflection by the deflector, to the maximum image height, L represents a distance between the first surface and a position of an image formed in the main scanning direction by an optical system located on the light source unit side of the max-power lens, and L