University of Tokyo is developing a wearable and modular device allowing users to perceive and respond to spatial information using haptic cues in an intuitive and unobtrusive way. The system is composed of an array of "optical-hair modules", each of which senses range information and transduces it as an appropriate vibro-tactile cue on the skin directly beneath it (the module can be embedded on clothes or strapped to body parts as in the figures below). An analogy for our artificial sensory sys...