PURPOSE: To prevent the disorder of print, etc., by devising a connection at the boundary point of each partial scan in a main scanning direction.
CONSTITUTION: Light projected from a light source 2 is reflected by the specular surface (f) of a rotary polygon mirror 1, which rotates to scan in a scanning direction from 16 to 17 through an optical system 6 for image formation and a plane mirror 4. When the specular surface (f) reaches a position (f'), the lightprojected from a light source 3 is reflected by the specular surface (f') and further reflected by a plane mirror 5 through an optical system 7 for image formation to scan in a direction form 17 to 18. A means for detecting boundaries of partial scans is provided to generate detection signals for the starting and ending points of the partial scans. In this case, light from light sources 2 and 3, or 8 and 9 can be used under the control of the optical systems.
MIKAMI TOMOHISA
ABE FUMITAKA
SAKURAI FUMIO
ITAMI SATOSHI
MATSUDA TADASHI
