Irradiation device and image-reading device
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United States of America Patent
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May 3, 2016
Grant Date -
Dec 4, 2014
app pub date -
Dec 3, 2012
filing date -
Jan 30, 2012
priority date (Note) -
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Abstract
An irradiation device increasing the lighting depth and facilitating the assembling is provided. A transparent bar-shaped light guide having LEDs disposed near ends thereof includes a first prism group and a first reflector, and, a second prism group and a reflector which are provided so as to extend in a lengthwise direction and which diffuse and reflect light. The light guide includes a first light outgoing area emitting reflected light as primary light Lm, and a second light outgoing area emitting reflected light as secondary light Ls. The first light outgoing area includes a plane portion forming a flat surface. A plane mirror reflects the secondary light Ls in a direction overlapping the primary light Lm in a read area.
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