The invention is a multiplexer which enables light to be sent to and received from samples for simultaneous analysis. A multiplexer is described which uses a transverse probe to reflect light at an angle into an optical rod. The transverse probe is selectively rotated to transmit light to a second optical...http://www.google.com.au/patents/US4989932?utm_source=gb-gplus-sharePatent US4989932 - Multiplexer for use with a device for optically analyzing a sample
