ILLUMINATION FOR FULL-WIDTH SCANNING ARRAYS
Original Publication Date: 1994-Feb-28
Included in the Prior Art Database: 2004-Apr-06
Xerox Disclosure Journal
The present disclosure is directed toward the use of an electro-luminescent strip as an illumination source for a full-width array scanning system. As illustrated in the figure, an electro-luminescent strip 10 is used to illuminate an original 12 on a scanner platen 14. A Fresnel lens 16 is used to focus the light down to a small strip at the region to be scanned, 18, thereby increasing the intensity of the light. The output of electro-luminescent strip 10 may be increased by the standard method of employing an alternating current (AC) signal to drive the strip. A scanning full-width array 20 is used to receive the reflected light because it is inherently more sensitive to light than a monolithic sensor.