Improvements in or relating to optical navigation devices

摘要

Disclosed is an optical navigation device (100) comprising two main elements, an optical transmission element (104), operable in use to transmit light from an illumination source (108) to a sensor (110) via a mousing surface (112), and a housing unit (103). The optical transmission element (104) may have an alignment shaft (122). Ideally the two main elements are assembled to a substrate (102) by snap-fitting them together, the alignment shaft ensuring that the optics are properly aligned to the substrate and the light source and sensor thereon.