John G. Linvill (August 8, 1919 – February 19, 2011)[1] was an American professor (emeritus) of Electrical engineering at Stanford University, known for his pioneering work in higher education, integrated circuits and semiconductors, and for development of the Optacon reading machine for the blind.

He worked at Bell Telephone Laboratories from 1951 to 1955, when he joined the Stanford Electrical Engineering department.

In 1969 he was appointed head of the EE department, and in 1979 he became Director of the Center for Integrated Systems at Stanford.

[5] In 1962, Linvill conceived the Optacon[6] (Optical-to-Tactile Converter) as a means to allow his blind daughter, Candy, to read ordinary print.

In 1970 he, Jim Bliss, and others from Stanford and SRI co-founded Telesensory Systems (TSI) to manufacture and distribute the Optacon.