A multi-use assay system accurately docks a removable test strip supporting a reagent-analyte reaction with an optics system including an LED, photodetector, and lenses or light pipes for directing light to and from the test strip. Docking is achieved using alignment fixturing, whereby an optics block...http://www.google.es/patents/US6750962?utm_source=gb-gplus-sharePatente US6750962 - Optics alignment and calibration system
