Invention Grant
- Patent Title: Linear lighting apparatus and image reader using the same
- Patent Title (中): 线性照明设备和使用其的图像读取器
-
Application No.: US12208035Application Date: 2008-09-10
-
Publication No.: US08167475B2Publication Date: 2012-05-01
- Inventor: Masayuki Katsumata , Azusa Shiratori , Shuuichi Shimoda , Masami Tabata
- Applicant: Masayuki Katsumata , Azusa Shiratori , Shuuichi Shimoda , Masami Tabata
- Applicant Address: JP Saitama-Ken
- Assignee: Canon Components, Inc.
- Current Assignee: Canon Components, Inc.
- Current Assignee Address: JP Saitama-Ken
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2006-304892 20060313
- Main IPC: F21V7/04
- IPC: F21V7/04 ; G02B5/12

Abstract:
Conventional methods using two optical waveguide members are disadvantageous in cost because they require two optical waveguide members and pairs of their associated components. A linear lighting apparatus includes a rod-like optical waveguide member (100) formed by a transparent material, a light source placed near an end face of the optical waveguide member (100) in the longitudinal direction, and a light exit surface (101) formed on at least part of the optical waveguide member (100) in the longitudinal direction. A cross section of the optical waveguide member in the widthwise direction has a plurality of reflecting areas (102, 103) at positions to face a light exit surface (101) and a barrier (106) at a boundary portion between the reflecting areas (102, 103).
Public/Granted literature
- US20090010020A1 LINEAR LIGHTING APPARATUS AND IMAGE READER USING THE SAME Public/Granted day:2009-01-08
Information query