Patent ID: 7038823
Filing Date: 2006-05-02
Classification: G02B

Abstract:
1. A light scanning device for focusing a light beam onto a scanned surface through a scanning lens group after deflecting said light beam emitted from a light source by a rotating deflector, said light scanning device comprising: (n) lens units (n is a natural number of ≧2) included in said scanning lens group, said lens units being arranged such that their optical axes are inclined at inclination angles α to a main scanning plane, wherein said inclination angles α satisfy the following condition: where αi is an inclination angle of an i-th lens unit (i is from 1 to n) from said deflector, and a change rate Ki when only said i-th lens unit is inclined at a minute angle Ai is defined as Ki=Δi/Ai where a curvature amount on said scanned surface is represented as Δi.