Optical multi-beam scanning device and image forming apparatus

Details Optical multi-beam scanning device and image forming apparatus Optical multi-beam scanning device and image forming apparatus

2005-03-29

2005-03-29

Cherry, Euncha P. (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C347S233000

Reexamination Certificate

active

06873445

ABSTRACT:
An optical multi-beam scanning device includes three or more light sources, a pre-deflection optical unit for providing a predetermined characteristic for each light beam emitted from the light sources, each pre-deflection optical unit being disposed so that a height of an optical path in a sub-scanning direction and an angle in the sub-scanning direction differ, a within-set combining unit for combining the optical paths by reflecting certain light beams being components of a set, and a light deflection unit for deflecting the plurality of light beams via the within-set combining unit in the main-scanning direction by reflection of a same surface.

REFERENCES:
patent: 5715078 (1998-02-01), Shiraishi et al.
patent: 5734489 (1998-03-01), Shiraishi et al.
patent: 5838479 (1998-11-01), Shiraishi et al.
patent: 5963354 (1999-10-01), Shiraishi et al.
patent: 6347003 (2002-02-01), Shiraishi et al.
patent: 2001-330788 (2001-11-01), None

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