In a check processing array, an imaging/illumination arrangement for illuminating and imaging checks at one or several imaging sites as they are rapidly, continuously transported past two or more imaging stations, each station having, as its illumination source, a hollow Lambertian integrating...http://www.google.ca/patents/US5825945?utm_source=gb-gplus-sharePatent US5825945 - Document imaging with illumination from lambertian surfaces
