Patent ID: 6104524
Filing Date: 2000-08-15
Classification: G02B

Abstract:
An optical scanning device comprising:a light source that emits a light beam;a rotating polygon mirror that receives a light beam from said light source, said polygon mirror having a plural number of reflecting surfaces arrayed in a rotational direction of said polygon mirror, said reflecting surfaces being different from one another in their width when viewed in the rotational direction;a scan optical system that scans a target member with a light beam deflected by said polygon mirror; anda modulation circuit that modulates the light beam deflected by a wide one of the reflecting surfaces by an image signal representative of an image to be formed on the target member, the modulation circuit modulating the light beam deflected by a narrower one of the reflecting surfaces by an image signal formed by inverting the image signal representational of the image to be formed on the target member.