Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Reexamination Certificate
2005-11-08
2005-11-08
Cherry, Euncha P. (Department: 2872)
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
C347S239000
Reexamination Certificate
active
06963433
ABSTRACT:
To provide a multibeam scanning optical device and an image forming apparatus using the same which can attain both of a large adjustment range and high adjustment accuracy using a plurality of adjusting units having sensitivities different from each other. There is provided a multibeam scanning optical device including: a first optical system which transforms a plurality of light beams emitted from a plurality of light source units into divergent light beams or convergent light beams; a second optical system which focuses a plurality of light beams emitted from the first optical system as a linear image in a main scanning direction in the vicinity of a deflection plane of a deflecting unit; the deflecting unit which deflects a plurality of light beams emitted from the second optical system in the main scanning direction; and a third optical system which focuses the plurality of light beams deflected by the deflecting unit on a surface to be scanned at a predetermined scanning lines gap, in which the multibeam scanning optical device further includes a plurality of adjusting units having sensitivities different from each other which change a relative gap in a sub-scanning direction of principal ray of a plurality of light beams incident in the second optical system.
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Canon Kabushiki Kaisha
Cherry Euncha P.
Fitzpatrick ,Cella, Harper & Scinto
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