公开(公告)号：US20030076551A1

公开(公告)日：2003-04-24

申请号：US10295925

申请日：2002-11-18

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tatsundo Kawai ,  Osamu Hamamoto ,  Shinichi Takeda ,  Satoshi Itabashi ,  Toshimitsu Iso

IPC: H04N001/03 ,  H04N001/04 ,  H04N001/191

CPC classification number: G02B6/0013 ,  G02B6/0001 ,  G02B6/0031 ,  G02B6/0036 ,  G02B6/0038 ,  G02B6/0043 ,  G02B6/0046 ,  G02B6/0055 ,  G02B6/0061 ,  G02B6/10 ,  G02B6/42 ,  G02B2006/0098 ,  H04N1/02815 ,  H04N1/0282 ,  H04N1/02835 ,  H04N1/0284 ,  H04N1/02885 ,  H04N1/0289 ,  H04N1/03 ,  H04N1/0313 ,  H04N1/0316 ,  H04N1/0318 ,  H04N2201/03112 ,  H04N2201/03125 ,  H04N2201/03129 ,  H04N2201/03141 ,  H04N2201/03145

Abstract: There is disclosed an illumination device in which a light guide is adapted to emil the light from a face thereof and is provided with an area, on a face opposite to the light emitting face, for diffusing and/or reflecting the light introduced into the light guide from an end face thereof or is provided with uneven light emitting characteristics along the longitudinal direction of the light guide, and the center of the light source positioned at the end of the light guide is placed at a position aberrated from the normal line to said area, whereby attained are compactnces, a low cost, a low eleotric power consumption, a high efficiency of utilization of the light emitted by the light source, and excellent and uniform illumination characteristics. There are also disclosed an image reading device and an information processing apparatus, equipped with the above-mentioned illumination device.

Abstract translation: 公开了一种照明装置，其中光导件适于从其表面喷射光，并且在与发光面相对的表面上设置有用于扩散和/或反射引入光的光的区域 从其端面引导或沿着导光体的纵向方向具有不均匀的发光特性，并且位于导光体的端部处的光源的中心位于与所述光导的法线垂直的位置处 面积小，成本低，电力消耗低，光源发出的光的利用效率高，照明特性优良。 还公开了配备有上述照明装置的图像读取装置和信息处理装置。