An engineered lighting system for use in an inspection system is comprised of an array of light emitting diodes. A specimen is brought into the viewing area, and a current pulse is provided to the diodes of the array to selectively flash all or a portion of the diodes of the array. Reflected light from...http://www.google.com.au/patents/US4882498?utm_source=gb-gplus-sharePatent US4882498 - Pulsed-array video inspection lighting system
