An optical inspection system (10) has an inspection region (20) through which articles (12) pass and are illuminated by illumination (22) provided by an illumination source (30). The source is shielded from the inspection region by a protective shield or tube (32) transmissive of the illumination. A...http://www.google.es/patents/US5402264?utm_source=gb-gplus-sharePatente US5402264 - Cleaning apparatus for light tube in an optical inspection system
Cleaning apparatus for light tube in an optical inspection system
