Color image reader with two-step color dispersion

Details Color image reader with two-step color dispersion Color image reader with two-step color dispersion

1995-10-17

1997-12-09

Coles, Sr., Edward L.

Facsimile and static presentation processing

Natural color facsimile

Scanning

358505, 358511, 358515, 348276, 348277, H04N 146, H04N 314

Patent

active

056966105

ABSTRACT:
Light reflected from a document surface is given first color dispersion when passing through a prism interface and second color dispersion when passing through another prism interface. The second color dispersion is in an opposite direction to and has larger partial dispersion in a blue range than the first color dispersion. The prism interface may be replaced by an interface of two lenses which interface is a curved surface whose center of curvature is deviated from the optical axis of the reflected light in the auxiliary scanning direction.

REFERENCES:
patent: 4882619 (1989-11-01), Hasegawa et al.
patent: 4926249 (1990-05-01), Ichihara et al.
patent: 5329384 (1994-07-01), Setani et al.

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