Optoelectronic Joystick Controller
Original Publication Date: 1985-Jan-01
Included in the Prior Art Database: 2005-Feb-18
This article discloses an optoelectronic joystick which uses photoresistors, a light source and a movable sphere as a shutter element. Movement of the sphere is controlled by an attached joystick and causes varying amounts of light to impinge on the photoresistors. Referring to Fig. 1, the joystick assembly includes a sphere having a transparent, lower hemisphere 10, an opaque upper hemisphere 12 and an attached joystick 14, which may be molded integrally with hemisphere 12. Fig. 1 shows photoresistors 16 and 18 on diametrically opposite sides of the sphere. Referring to Fig. 2, there are two additional photoresistors 20 and 22 arranged on a perpendicular. The assembly further includes a lamp 24 and a lens 26 for directing light toward the sphere.