The invention pertains to a method and apparatus for providing a continuous, uniform, diffuse lighting environment for use in conjunction with electronic machine vision, or manual microscope inspection systems to inspect specular surfaces such as soldered circuits, ball bearings, reflective packaging,...http://www.google.es/patents/US5461417?utm_source=gb-gplus-sharePatente US5461417 - Continuous diffuse illumination method and apparatus
Continuous diffuse illumination method and apparatus
