ILLUMINATION DEVICE AND IMAGE READING DEVICE

专利名称：ILLUMINATION DEVICE AND IMAGE

READING DEVICE

发明人：Katsuhiko Okamoto申请号：US14579802申请日：20141222

公开号：US20150189117A1公开日：20150702

专利附图：

摘要：An illumination device includes a light source and a columnar light guide

including: an incident surface provided at least one longitudinal end of the light guide andallowing light emitted from the light source to enter the light guide therethrough; a

diffusing surface which forms one side surface of the light guide extending along anoptical axis of the incident light entering the light guide through the incident surface andhas a row of light diffusion patterns provided to diffuse the incident light; and an exitsurface located opposite to the diffusing surface, extending along the optical axis, andallowing light diffused by the diffusing surface to exit the light guide therethrough. Thelight diffusion patterns have a prismatic shape rising toward the exit surface and areprovided on the diffusing surface from D×8 or greater distance from the incident surfacewhere D represents the diameter of the light guide.

申请人：KYOCERA Document Solutions Inc.

地址：Osaka JP

国籍：JP

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