Patent ID: 8957935
Filing Date: 2015-02-17
Classification: G02B,G03G

Abstract:
1. A light scanning unit for scanning a beam onto a scanned surface, the light scanning unit comprising: a light source which emits a beam according to an image signal; an optical deflector which deflects and scans the beam emitted from the light source, in a main scanning direction; and a imaging optical system which images the beam deflected and scanned by the optical deflector, on the scanned surface, wherein, if a main scanning direction width of the beam emitted from the light source is defined as a, a sub-scanning direction width of the beam is defined as b, a main scanning incident angle of the beam incident on the scanned surface with respect to a main scanning section is defined as Φ, and a sub-scanning incident angle of the beam incident on the scanned surface with respect to a sub-scanning section is defined as β, a maximum main scanning incident angle Φ