Scanner apparatus and image forming apparatus

Details Scanner apparatus and image forming apparatus Scanner apparatus and image forming apparatus

2007-07-17

2007-07-17

Cherry, Euncha P. (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S216100

Reexamination Certificate

active

11312495

ABSTRACT:
A polygon mirror is placed so that its rotation axis is positioned on a center line in a main scanning direction of an image forming area scanned by each light beam. Moreover, two light beam irradiating optical units are placed so that the light beams are incident on reflective surfaces of the polygon mirror from directions that cross the line and are point symmetrical to each other with respect to the rotation axis of the polygon mirror. Further, two fθ lenses are placed so that their lens center positions are displaced in mutually opposite directions from the center line in the main scanning direction of the image forming area.

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