Greenblum & Bernstein, P.L.C.
Multi-beam scanning optical system
A multi-beam scanning optical system is provided with a light source unit, polygonal mirror, and an f&thgr; lens. The f&thgr; lens includes a first lens that converges the beams mainly in the main scanning direction, and a second lens that converges the beams mainly in the auxiliary scanning direction. The first and second lenses are made of different materials. Further, one of the first and second lenses is formed integrally with the other using a mold such that the first and second lenses constitute a composite lens unit.
Ashai Kogaku Kogyo Kabushiki Kaisha
G G G
G02B G02B G02B
inventional inventional inventional
Susumu Yoshihiro Yasushi Taminori
Mikajiri Hama Suzuki Odano