Optical beam scanning apparatus and image forming apparatus

Details Optical beam scanning apparatus and image forming apparatus Optical beam scanning apparatus and image forming apparatus

2011-03-08

2011-03-08

Cherry, Euncha P (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

Reexamination Certificate

active

07903311

ABSTRACT:
An optical beam scanning apparatus according to the present invention includes a light source, a pre-deflection optical system, a light deflecting device, a post-deflection optical system, a first sensor configured to detect a part of the luminous fluxes deflected by the light deflecting device, one or plural first optical elements configured to be provided in the post-deflection optical system and act on the luminous fluxes deflected by all the deflection surfaces of the light deflecting device; and a second optical element having positive power in the sub-scanning direction configured to be provided in an optical path between any one of the first optical elements and the first sensor and act on the luminous fluxes deflected by all the deflection surfaces of the light deflecting device.

REFERENCES:
patent: 7088485 (2006-08-01), Suzuki
patent: 7277212 (2007-10-01), Miyatake et al.
patent: 63-273814 (1988-11-01), None
patent: 63-274263 (1988-11-01), None
patent: 4-51110 (1992-02-01), None
patent: 11-218991 (1999-08-01), None

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