Invention Grant
- Patent Title: Rod-shaped light guide and image reading device
- Patent Title (中): 杆状光导和图像读取装置
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Application No.: US12345181Application Date: 2008-12-29
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Publication No.: US07990584B2Publication Date: 2011-08-02
- Inventor: Makoto Ikeda
- Applicant: Makoto Ikeda
- Applicant Address: JP Tokyo
- Assignee: Nippon Sheet Glass Co., Ltd.
- Current Assignee: Nippon Sheet Glass Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2008-157218 20080616
- Main IPC: H04N1/04
- IPC: H04N1/04

Abstract:
A rod-shaped light guide reflects light incident on an end face thereof in the interior of the rod-shaped light guide and emits the light outside from a light emitting surface provided to extend in the longitudinal direction. The rod-shaped light guide includes: a scattering pattern surface provided to be opposite to the light emitting surface and operative to scatter the light incident on the end face; first and second lateral surfaces provided between the light emitting surface and the scattering pattern surface; and first and second projections provided to project from the first and second lateral surfaces, respectively, capture the light reflected by the light emitting surface, reflects the light toward the light emitting surface, and causes the light to be emitted outside from the light emitting surface.
Public/Granted literature
- US20090310190A1 ROD-SHAPED LIGHT GUIDE AND IMAGE READING DEVICE Public/Granted day:2009-12-17
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