A detection cell which is used as a component of an optical biosensor comprises a transparent base plate and a sample plate on the base plate. The sample plate has a matrix of wells extending through it to each to receive a sample. The base plate includes a waveguiding film and a diffraction...http://www.google.es/patents/US5738825?utm_source=gb-gplus-sharePatente US5738825 - Optical biosensor matrix
