Light source unit and object reader

Facsimile and static presentation processing – Facsimile – Picture signal generator

Reexamination Certificate

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Details

C358S474000, C358S484000, C358S497000

Reexamination Certificate

active

08035868

ABSTRACT:
A light source unit and reader can include a line light source that is attached to a radiator and a rod lens that is attached above the line light source. The radiator with the line light source and the rod lens attached thereto, and a linear strip-shaped reflector arranged in front of the rod lens, are housed in a carriage. The carriage is supported beneath a contact glass and movable in a direction normal to a longitudinal axis of the line light source. The lens has a section in a plane normal to a longitudinal axis of the lens, in which a surface of the lens facing the light source has a curved line that expands or is convexly facing toward the light source. The opposite surface of the lens from the light source has composite curves including a plurality of continuous curves with different radii of curvature. The composite curves are located on both sides of a plane containing the optical axis of the LED and expand or are convex in an opposite direction from the light source.

REFERENCES:
patent: 5196950 (1993-03-01), Fukoka et al.
patent: 5357099 (1994-10-01), Tabata et al.
patent: 6266163 (2001-07-01), Hirakawa
patent: 7085023 (2006-08-01), Okamoto et al.
patent: 11-27458 (1999-01-01), None

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