Pantograph

A haptic input device that allows users to explore a two-dimensional surface by physically moving a stylus or finger pad across an exploration area, while receiving tactile feedback from an attached tactile display. In accessibility applications, the pantograph enables people with visual impairments to explore tactile graphics by moving the device over a surface, feeling different textures and shapes that correspond to different parts of an image or diagram. The device tracks the user's position and provides location-dependent tactile and audio feedback, making it possible to explore maps, charts, diagrams, and other visual content through touch.