Light guide, illuminating device having the light guide, and ima

Details Light guide, illuminating device having the light guide, and ima Light guide, illuminating device having the light guide, and ima

1994-01-19

1996-03-12

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

358471, 358484, H04N 104

Patent

active

054991129

ABSTRACT:
There is disclosed an illumination device in which a light guide is adapted to emit the light from a face thereof and is provided with an area, on a face opposite to the light emitting face, for diffusing and/or reflecting the light introduced into the light guide from an end face thereof or is provided with uneven light emitting characteristics along the longitudinal direction of the light guide, and the center of the light source positioned at the end of the light guide is placed at a position aberrated from the normal line to said area, whereby attained are compactness, a low cost, a low electric power consumption, a high efficiency of utilization of the light emitted by the light source, and excellent and uniform illumination characteristics. There are also disclosed an image reading device and an information processing apparatus, equipped with the above-mentioned illumination device.

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patent: 5276504 (1994-01-01), Zwirner et al.
patent: 5289351 (1994-02-01), Kashima et al.
patent: 5295047 (1994-03-01), Windross
patent: 5359691 (1994-10-01), Tai et al.

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