Optical Digitizing Stylus
Original Publication Date: 1984-Oct-01
Included in the Prior Art Database: 2005-Feb-05
An alternative to an optical mouse shaped as a stylus for use in association with a digitizing tablet is disclosed. The stylus carries four central optical detector fibers in square formation connected to a detector together with two adjacent optical fibers spaced on either side of the central fiber. The latter two fibers illuminate a tablet with visible and infrared light which is reflected to the central fibers via a lens. Alternatively, the two fibers may be replaced by a transparent tube surrounding the central fibers for illumination purposes. To allow the ends of the optical fibers to contact the tablet, the lens may be dispensed with, but this requires a beam splitter between the optical fibers to connect to a light source and the detector. Fig.