A light scattering particle size distribution measuring apparatus inches a light source for providing a beam of light to contact with a sample cell holding a specimen. A detector assembly includes a first set of detector assembly includes a first set of detector elements for receiving scattered and/or...http://www.google.ca/patents/US6061131?utm_source=gb-gplus-sharePatent US6061131 - Optical axis adjustment apparatus and method for particle size distribution measuring equipment
