Scanning optical system, image formation apparatus including...

Details Scanning optical system, image formation apparatus including... Scanning optical system, image formation apparatus including...

2007-04-11

2009-11-24

Cherry, Euncha P (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

Reexamination Certificate

active

07623281

ABSTRACT:
A scanning optical system includes a deflector for deflecting a laser light flux from a light source and a second imaging optical system for focusing the laser light flux deflected by the deflector on a target scanning surface. The second imaging optical system has at least one optical function surface on which an optical function portion including a plurality of convex portions arranged therein so as to have a serrate cross section is formed in at least part thereof. The optical function surface is formed so that a width of each of the convex portions in an arrangement direction in which the convex portions are arranged is larger than a width of the laser light flux in the arrangement direction, which enters the optical function surface.

REFERENCES:
patent: 6215574 (2001-04-01), Toyoda
patent: 6392773 (2002-05-01), Hama et al.
patent: 2000-2847 (2000-01-01), None
patent: 2000-180781 (2000-06-01), None
patent: 3420956 (2003-04-01), None
patent: 2005-37561 (2005-02-01), None

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