Optical MEMS index finger microgesture input sensor for mobile and wearable devices

We report the first optical microsystem that captures index finger microgestures with the precision, bandwidth, power consumption and form-factor required for close-range handwriting and gesture keyboarding (e.g. Swipe) on smart watches and mobile handsets. Finger position is measured with 30μm resolution (at a 5cm distance) at a bandwidth of up to 550Hz… (More)