Input device for control of cursor, has source of light radiating on convex lens, and on obstruction displaying reflected light on light signal processing plant by another convex lens, which calculates change in position of object
摘要
<p>The device has a housing (11) and a convex lens (131), which is arranged on the housing. An object touches a lens and moves on the lens. The light source is arranged in the housing and the light is radiated on the lens. A reflected light is produced if the object touches the lens. Another convex lens (132) is arranged in the housing and reflected light is displayed on a light signal processor. The processor calculates the change of position of the object and produces a control signal for the computer system if the object is moved on the former lens.</p>
