Method and apparatus for multi-beam optical scanning capable...

Details Method and apparatus for multi-beam optical scanning capable... Method and apparatus for multi-beam optical scanning capable...

2005-01-04

2005-01-04

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C347S232000, C347S241000

Reexamination Certificate

active

06839157

ABSTRACT:
An optical scanning apparatus includes light sources, an aperture having, and coupling lenses. Numbers of the light sources and the coupling lenses are equal to each other and the apparatus satisfies an inequality 12.7 <(D×β0×m0×xdpi)/(2×NA) <38.1 and an equation β0=(β+−β−)/(n−1), wherein D represents a width of the slit of the aperture, β0represents a beam open angle, mo represents a total lateral magnification ratio, dpi represents a number of dots per inch, NA represents a numerical aperture, β+represents a positive open angle, β−represents a negative open angle, and n represents the number. Further, an image forming apparatus using this optical scanning apparatus and an image forming method are provided.

REFERENCES:
patent: 6381057 (2002-04-01), Itabashi
patent: 6400391 (2002-06-01), Suhara et al.
patent: 6429956 (2002-08-01), Itabashi
patent: 6469772 (2002-10-01), Itabashi
patent: 6596985 (2003-07-01), Sakai et al.
patent: 04-127115 (1992-04-01), None
patent: 10-268217 (1998-10-01), None

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