Browse Prior Art Database

Opto-magnetic Input Device with Built-in Encoder

IP.com Disclosure Number: IPCOM000055079D
Original Publication Date: 1980-May-01
Included in the Prior Art Database: 2005-Feb-13

Publishing Venue

IBM

Related People

Authors:
Tseng, SC [+details]

Abstract

A magnetic field producing element (e.g., a magnetic stylus or magnet key element) simultaneously causes a plurality of optical path interruption elements to interrupt predetermined optical paths of a plurality of optical paths, the optical paths interrupted automatically encoding the position of the magnetic field producing element.