Since the later half of the 1990s though, your rodent has been ever significantly more likely to rely upon an optical sensor taking the form of a small CCD camera connected to motion sensing ...

(Charge-Coupled Device sensor) An electronic memory that records the intensity of light as a variable charge. Although mostly replaced by CMOS sensors to capture images in cameras, camcorders and ...

A type of CCD sensor from Fujifilm that is used in its digital cameras. Super CCD uses a honeycomb structure of octagon-shaped light sensors (photodiodes) at 45 degree angles rather than 90 degrees.