Multi-beam scanning apparatus and image forming apparatus...

Facsimile and static presentation processing – Facsimile – Picture signal generator

Reexamination Certificate

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Details

C347S233000, C347S225000, C347S229000, C347S231000, C347S234000, C347S235000, C347S241000, C347S243000, C347S248000, C347S250000, C347S224000, C358S412000, C358S475000, C358S505000, C358S296000, C358S471000, C358S401000, C358S409000, C358S410000

Reexamination Certificate

active

07154640

ABSTRACT:
This invention is to obtain a multi-beam scanning apparatus which always executes synchronization detection at the same timing to prevent any jitter, and an image forming apparatus using the apparatus. In a multi-beam scanning apparatus which guides a plurality of light beams emitted from a light source to an optical deflector, guides the plurality of light beams deflected by the optical deflector onto a target scanning surface through a scanning lens system, and guides some of the plurality of light beams deflected by the optical deflector to a synchronization detecting unit to execute synchronization using a sync signal obtained by the synchronization detecting unit, the synchronization detecting unit includes a BD slit which determines the synchronization detecting timing, and the BD slit has a smooth member.

REFERENCES:
patent: 6166376 (2000-12-01), Kamioka
patent: 6362470 (2002-03-01), Yoshida et al.
patent: 2003/0043441 (2003-03-01), Azami et al.
patent: 10-151796 (1998-06-01), None
patent: 10-228149 (1998-08-01), None
patent: 11-242171 (1999-09-01), None
patent: 2000-131634 (2000-05-01), None
patent: 2000-284194 (2000-10-01), None

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