Line head and an image forming apparatus using the line head

Details Line head and an image forming apparatus using the line head Line head and an image forming apparatus using the line head

2007-07-12

2010-10-05

Pham, Hai C (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

C347S229000, C347S248000

Reexamination Certificate

active

07808519

ABSTRACT:
A line head, includes: a microlens array in which a plurality of microlenses having a magnification whose absolute value is below 1 are arranged in a main scanning direction of a surface-to-be-scanned, and a plurality of luminous element groups which are arranged in a one-to-one correspondence with the respective plurality of microlenses, wherein in each of the plurality of luminous element groups, a plurality of luminous elements are arranged at mutually different main-scanning-direction positions in the main scanning direction, the plurality of luminous elements are respectively caused to emit lights at timings in conformity with a movement of the surface-to-be-scanned in a sub scanning direction, and light beams emitted from the plurality of luminous elements are imaged on the surface-to-be-scanned at mutually different main-scanning-direction positions in the main scanning direction to form a plurality of spots side by side on the surface-to-be-scanned in the main scanning direction, and in each of the plurality of luminous element groups, out of the plurality of luminous elements constituting the luminous element group, two luminous elements caused to emit lights to form adjacent spots are arranged at mutually different sub-scanning-direction positions in the sub scanning direction.

REFERENCES:
patent: 4435064 (1984-03-01), Tsukada et al.
patent: 5600363 (1997-02-01), Anzaki et al.
patent: 6043843 (2000-03-01), Kelley et al.
patent: 6525752 (2003-02-01), Vackier et al.
patent: 7248277 (2007-07-01), Ishikawa
patent: 2000-158705 (2000-06-01), None

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