US Patent 7751098 Light-channeling apparatus and method

A scanning module includes a body casing having a light passage slit thereon, a plurality of reflecting mirrors located inside the body casing, a light-channeling apparatus, and a light guiding body. The light-channeling apparatus includes a first light-guiding tube positioned between a light source and a document, and a second light-guiding tube positioned between the document and the light passage slit. The light-guiding body is positioned inside the first light-guiding tube or the second light-guiding tube.