Lewis Vincent Peterson, 71, a retired audio-visual consultant, died Monday at Alexandria Hospital after a stroke.

As a professor of audio-visual studies at the University of Illinois from 1936 to 1941, he had pioneered in the use of motion pictures for instruction purposes.

During World War II, Mr. Peterson served as a colonel with the Army Air Corps, producing and directing training films for Air Corps troops.

He returned to the University of Illinios in 1947, where he helped organize an educational television station and served as its producer-director. He also made a motion picture "The Band in Concert," about the university's marching band.

Mr. Peterson retired from the university in 1961 and joined the Agency for International Development, which sent him to Kabul, Afghanistan, to assist in setting up a closed-circuit television system at Kabul University.

he returned here in 1963 to become audio-visual production officer in the medical arts and photography branch of the National Institutes of Health.

After retiring for a second time in 1968 he was a consultant to the American Science Film Association until 1973.

Born in Coulterville, III., Mr. Peterson was a graduate of McKendree College and received a master's degree from the University of Illinois.

He is survived by his wife, Augusta Peters Peterson, of the home in Falls Church; three daughters, Christine Brinkley of Champaign, III.; Penny Finch, of Silver Spring, and Dr. Judith Stevens, of Chesterton, Ind.; a brother, Dr. Paul Q. Peterson of Chicago, and seven grandchildren.

The family suggest that expressions of sympathy be in the form of contributions tothe American Diabetes Association.