Digital image forming apparatus

Details Digital image forming apparatus Digital image forming apparatus

1997-09-04

2000-06-27

Au, Amelia

Facsimile and static presentation processing

Facsimile

Recording apparatus

355 74, 349196, H04N 121

Patent

active

060813466

ABSTRACT:
The present invention allows formation of an image having an excellent finish quality by using an extremely simple and low-cost structure. Linearly polarized light transmitted through each of liquid crystal cells of a liquid crystal panel is made into circularly polarized light by a quarter-wave phase plate, and thereafter, the circularly polarized light is used to expose a photographic printing paper via lithium-niobate prisms serving as a birefringent filter. As a result, light transmitted through a light transmitted area of each of the liquid crystal cells is irradiated on a region on the photographic printing paper corresponding to a light non-transmitted area so as to prevent formation of a pattern caused by the light non-transmitted area.

REFERENCES:
patent: 4239329 (1980-12-01), Matsumoto
patent: 5109290 (1992-04-01), Imai
patent: 5115270 (1992-05-01), Kraft et al.
patent: 5122831 (1992-06-01), Suzuki
patent: 5424802 (1995-06-01), Saita
patent: 5715029 (1998-02-01), Fergason
patent: 5729327 (1998-03-01), Narita
patent: 5731886 (1998-03-01), Taber et al.

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