Line head and image forming device using the same

Details Line head and image forming device using the same Line head and image forming device using the same

2008-09-10

2010-06-08

Pham, Hai C (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

Reexamination Certificate

active

07733363

ABSTRACT:
A line head includes a lens array having a plurality of positive lens systems in a first direction. Each positive lens system has a pair of lenses with positive refractive power. A light emitter array disposed on an object side of the lens array has a plurality of light emitting elements disposed corresponding to the positive lens systems. An aperture plate forms an aperture stop on the object side of the pair of lenses. A focal distance f1of one of the pair of lenses disposed on the object side satisfies the conditional formula f1≦d0/(1+W0/D1).

REFERENCES:
patent: 4253102 (1981-02-01), Kataoka et al.
patent: 4474422 (1984-10-01), Kitamura
patent: 5870132 (1999-02-01), Inoue et al.
patent: 02-004546 (1990-01-01), None
patent: 06-278314 (1994-10-01), None
patent: 06-344596 (1994-12-01), None

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