“Inside, we find that Apple has upgraded to laser tracking from the Apple (formerly Mighty) Mouse’s optical tracking, offering greater accuracy over more surfaces. There’s also a fairly standard Broadcom chip handling both the processing and Bluetooth transmission duties,” Bolton reports. “All very well, but the interesting part is the luscious coating of capacitive sensors covering the inside of the mouse’s plastic top half.”
“This is the same type of sensor used in the iPhone, and they work by using the natural electric conductivity of your body to affect the voltage inside the sensors,” Bolton reports. “Capacitive sensors are very accurate and highly responsive to even a light touch… The accuracy of capacitive sensors allows for advanced software features like momentum scrolling. The speed of your finger movement is always carefully measured, and if you lift off while moving then the scrolling simply continues at that speed before running down.”
“Apple not only owns the trademark on the name Multi-Touch, but has also filed patents relating to ‘a computer mouse having a touch-sensitive shell capable of accepting multi-touch finger gestures,'” Bolton reports. “It seems unlikely that these potential barriers will stop more multi-touch mice appearing before too long, but Apple has certainly laid down a marker for how we will interface with this generation of multi-touch capable operating systems.”
Read more in the full article here.