Patent ID: 7057777

Claim:
An optical image scanning device comprising: a casing having a light-transmittable document supporting plate; a top cover movably mounted to the casing for removably covering the document supporting plate, the top cover having an underside surface facing the document supporting plate, a layer of fluorescent material being formed on the underside surface of the top cover; and an optic module arranged inside the casing, the optic module comprising a light source for projecting an exciting light onto the fluorescent layer whereby the fluorescent material of the layer is excited by the exciting light to emit a scanning light, and an image sensing unit for receiving the scanning light; when a light-transmittable document comprising image formed thereon is positioned on the document supporting plate, the exciting light generated by the light source and projected onto the fluorescent layer causes the fluorescent material to emit the scanning light transmitting through the light-transmittable document and thus projecting the image onto the image sensing unit.