Patent ID: 6181448
Filing Date: 2001-01-30
Classification: G02B

Abstract:
A multi-laser scanning unit (LSU) comprising:a driving source for providing a rotary force;a deflection disk installed around a rotary shaft of the driving source and having a center point, said deflection disk having a plurality of sectors each with a hologram pattern for diffracting and deflecting incident light, for scanning light through rotation to result in a plurality of scanning light lines;a plurality of light sources installed facing one surface of the deflection disk, for irradiating a plurality of light lines onto a plurality of predetermined incident points on the deflection disk;a light path changing means for changing traveling paths of the plurality of scanning lines formed by the rotation of the deflection disk,wherein the plurality of light sources are arranged such that two incident points which are farthest from each other among the plurality of incident points formed on the deflection disk form 180.degree. with the center point of the deflection disk; andwherein the plurality of the light sources are arranged such that the incident points onto the deflection disk form circles of identical radii and are at identical intervals.