The KSFT system provides:
• force output parallel to the surface of the human fingerpad;
• fingertip tracking across a flat surface.
using the system
to implement forms of touch
as they can deal with input in millimeters (mm) and output in newtons (N).
During development, a lot of time was spent on custom signal conditioning in the input chain.
As a result – despite being based on noisy, off-the-shelf optical mouse sensor input –
algorithms running on top of the hardware
aspects of fingertip surface texture perception
at high resolution.
One example of this is when
extending turntable scratching with friction display
How this can be done,
at millisecond resolution,
is described here