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    • 5. 发明公开
    • 도광체 및 화상 독취장치
    • 光指导和图像读取器
    • KR1020060023571A
    • 2006-03-14
    • KR1020057024669
    • 2004-06-18
    • 니혼 이타가라스 가부시키가이샤
    • 이케다마코토네모토히로유키
    • G02B6/00H04N1/03H04N1/031
    • H04N1/0318H04N2201/03112H04N2201/03125H04N2201/03141H04N2201/03145H04N2201/0317H04N2201/03195
    • [PROBLEMS] A document surface is illuminated efficiently by utilizing the characteristics of a compound paraboloid condenser (CPC) reversely to convert scattering light from some limited area over the entire angle into radiation light limited to a specified exit angle thereby minimizing spread of light. [MEANS FOR SOLVING PROBLEMS] In a light guide (10) arranged such that a light entering from the end face exits from an exit face (4) provided along the longitudinal direction while reflecting off the inner surface, a cross- sectional shape orthogonal to the longitudinal direction has two parabolas (2, 3) facing each other, a segment (bottom face) (1) connecting the focal points (a, b) of two parabolas (2, 3), and a segment corresponding to the exit face (4). A scattering pattern of white ink is formed on the segment (bottom face) (1) connecting the focal points (a, b).
    • [问题]通过利用复合抛物面聚光器(CPC)的特性来有效地照射文件表面,以将来自整个角度的一些有限区域的散射光转换成限定到指定出射角的辐射光,从而使光的扩散最小化。 解决问题的手段在将从端面入射的光从沿着长度方向设置的出射面(4)排出的光导(10)的同时反射出内表面的情况下,与 纵向具有彼此面对的两个抛物线(2,3),连接两个抛物线(2,3)的焦点(a,b)的段(底面)(1)和与出射面 (4)。 在连接焦点(a,b)的片段(底面)(1)上形成白色墨水的散射图案。