Patent 7121682 was granted and assigned to Lite-On on October, 2006 by the United States Patent and Trademark Office.
The present invention provides a scanning device including a lamp, an object, and a transparency (or a reflector). The present invention changes the optical path by varying the shape of tube wall of lamp, the transparency or the reflector to compensate the light in the boundary regions of the lamp. Moreover, the present invention is capable of reducing the dimension of the scanning device.