US 5,969,343 A · Linear illumination device

Abstract

A linear illumination device of the present invention includes: a guide made of a light transmitting material extending in a first direction, having a side face and at least one end face; at least one light emitter for allowing light to enter interior of the guide from the at least one end face of the guide; and a light diffusing section formed on part of the side face of the guide, for diffusing the light incident thereon, wherein at least part of the light entering the interior of the guide goes out from part of the side face of the guide facing the light diffusing section, thereby providing substantially linear illumination light along the first direction.

Claims10

Dependent claims

A linear illumination device comprising:

a substrate extending in a first direction;
a light emitting array provided on the substrate and arranged in the first direction;
and
a fiber array plate having a plurality of groups of fibers placed so as to respectively correspond to light emitting elements of the array,
wherein light from each of the light emitting elements is incident on a side face of a corresponding group of the fibers and goes out from the other side face, thereby irradiating a document placed so as to face the light emitting element array with linear illumination light along the first direction.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

08/608,744Filed 29 Feb 1996

Priority

JP 7-21639224 Aug 1995

Granted

19 Oct 1999

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

H04N 1/02835
Using a single or a few point light sources, e.g. a laser diode: in combination with a light guide, e.g. optical fibre, glass plate
H04N 1/02815
For picture information pick-up: means for illuminating the original, not specific to a particular type of pick-up head
H04N 1/02885
Means for illuminating the original, not specific to a particular type of pick-up head: means for compensating spatially uneven illumination, e.g.…
H04N 1/0289
Means for compensating spatially uneven illumination, e.g. an aperture arrangement: light diffusing elements, e.g. plates or filters

Linear illumination device

Life of this patent

Linear illumination device

Life of this patent

Abstract

Claims10