A symbology reader employing an area detector and LEDs mounted at various angular orientations on a printed circuit board for illuminating a target object in an object plane. Each of the LEDs is oriented according to a desired beam vector to illuminate a particular area of the object plane so that the...http://www.google.de/patents/US5886338?utm_source=gb-gplus-sharePatent US5886338 - Symbology reader illumination system
