A microplate forms a multiplicity of sample wells for holding samples to be assayed by light emissions or light transmission. The plate comprises an upper plate forming the side walls of the sample wells, the side walls being opaque so that light cannot be transmitted between adjacent wells through the...http://www.google.de/patents/US5319436?utm_source=gb-gplus-sharePatent US5319436 - Microplate farming wells with transparent bottom walls for assays using light measurements
