What is an Optical Trackball?
An optical trackball uses solid state Optical Navigation
Technology in place of the traditional mechanical assembly of
conventional trackballs. The only moving part in the entire
assembly is the ball, whose movement is sensed directly without
the need for shafts, separate encoders and opto-couplers. The
optical navigation sensors employed are well-established
architecture and are being utilized by other leading manufacturers
(such as Microsoft) in the latest generation of computer mice.