An apparatus for optically detecting light-absorbing contamination in at least one particle of low optical-loss material comprises an optical integrating chamber for containing the particles. A laser for emitting a laser beam to illuminate the particles is mounted in the plane of rotation of a rotating...http://www.google.fr/patents/US5256886?utm_source=gb-gplus-shareBrevet US5256886 - Apparatus for optically detecting contamination in particles of low optical-loss material
Apparatus for optically detecting contamination in particles of low optical ...
