| 摘要 |
PURPOSE: An illuminator is provided to illuminate an object with light of an LED(Light Emitting Diode) through a light-transmitting plate for improving the brightness uniformity. CONSTITUTION: A light source rod(20) has a light-receiving surface(23) located in the center of a distant side(21) opposite to a light-transmitting plate. An LED(40) is mounted on the light-receiving surface with the remaining region of a distant side provided with a prism array(24). Each prism of the prism array has a crest and a valley arranged in parallel in the thickness direction. The light source rod has a notch formed in a near side adjacent to a light-conductive plate opposite to the light-receiving surface to reflect light rays toward the prism array. A reflector is arranged in the center of the cut. Therefore, the light rays are not emitted directly from the cut without being reflected.
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