Optical scanning device and image forming apparatus

Details Optical scanning device and image forming apparatus Optical scanning device and image forming apparatus

2007-03-06

2008-10-28

Cherry, Euncha P (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

Reexamination Certificate

active

07443558

ABSTRACT:
An optical scanning device includes a first optical element that converts a cross-section shape of a light beam from a semiconductor laser to a desired shape; a second optical element that guides the light beam output from the first optical element to an optical deflector that deflects the light beam; and a third optical element that gathers the light beam deflected by the optical deflector onto a surface to be scanned to form a light spot thereby optically scanning the surface. At least one of the first optical element, the second optical element, and the third optical element includes a resin-made lens, at least one of the resin-made lenses has a power diffracting surface, and a surface shape of at least one of power diffracting surfaces is formed so that a power of a diffracting portion and a power of a refractive portion are cancelled out.

REFERENCES:
patent: 6215574 (2001-04-01), Toyoda
patent: 6348988 (2002-02-01), Aoki et al.
patent: 6359717 (2002-03-01), Suzuki et al.
patent: RE38195 (2003-07-01), Sakai et al.
patent: 6596985 (2003-07-01), Sakai et al.
patent: 6704129 (2004-03-01), Sakai et al.
patent: 6771407 (2004-08-01), Hayashi et al.
patent: 6781729 (2004-08-01), Suzuki
patent: 6801351 (2004-10-01), Suzuki et al.
patent: 6856438 (2005-02-01), Takanashi et al.
patent: 6903855 (2005-06-01), Aoki et al.
patent: 6999208 (2006-02-01), Suzuki et al.
patent: 7003242 (2006-02-01), Kida
patent: 7006120 (2006-02-01), Sakai et al.
patent: 7034973 (2006-04-01), Sakai
patent: 7038822 (2006-05-01), Sakai et al.
patent: 7068407 (2006-06-01), Sakai et al.
patent: 7133208 (2006-11-01), Kim
patent: 2003/0202451 (2003-10-01), Kimura et al.
patent: 2004/0169905 (2004-09-01), Hayashi et al.
patent: 2004/0184127 (2004-09-01), Nakajima et al.
patent: 2004/0196507 (2004-10-01), Sakai
patent: 2005/0179771 (2005-08-01), Ueda
patent: 2006/0077500 (2006-04-01), Hayashi et al.
patent: 2006/0187294 (2006-08-01), Saisho et al.
patent: 1497269 (2004-05-01), None
patent: 1621972 (2005-06-01), None
patent: 0 872 754 (2005-06-01), None
patent: 2002-287062 (2002-10-01), None
patent: 2004-280056 (2004-10-01), None
patent: 2005-258392 (2005-09-01), None
Chinese Office Action mailed Jul. 11, 2008 in corresponding application.

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