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    • 74. 发明授权
    • Light guide and line illuminator
    • 光导和图像阅读器
    • US07529445B2
    • 2009-05-05
    • US10562336
    • 2004-06-18
    • Makoto IkedaHiroyuki Nemoto
    • Makoto IkedaHiroyuki Nemoto
    • G02B6/26F21V7/04
    • H04N1/0318H04N2201/03112H04N2201/03125H04N2201/03141H04N2201/03145H04N2201/0317H04N2201/03195
    • A light guide emits lights incident on an end face from an emitting face extending longitudinally of the guide, while having the lights reflected by its internal face. A sectional shape of the guide in a direction orthogonal to the longitudinal direction of this light guide has two opposite parabolas, a line segment connecting the focal points of the two opposite parabolas, and a line segment (bottom face) corresponding to the emitting face. A scattering pattern consisting of white ink is formed on the line segment (bottom face) connecting the focal points. With this guide, the face of a document is to be efficiently illuminated by conversely utilizing the characteristic of the compound parabolic concentrator (CPC) to convert scattered lights extending over a full angle from a limited area into radiant lights confined to a prescribed emission angle and thereby minimizing the expansion of lights.
    • 光导从发射面沿着引导件的纵向发射入射在端面上的光,同时具有由其内表面反射的光。 引导件在与该导光体的纵向正交的方向上的截面形状具有两个相反的抛物线,连接两个相对的抛物线的焦点的线段和与发射面对应的线段(底面)。 在连接焦点的线段(底面)上形成由白色墨水组成的散射图案。 利用该指南,通过相反地利用复合抛物面聚光器(CPC)的特性将文件的面部有效地照射,将从限定区域延伸的全角度的散射光转换为限制为规定的发射角的辐射光,以及 从而最小化灯的扩展。