title: John Donovan Strong; 50 years in optics: introduction.
abstract: In March 1981 the Department of Physics and Astronomy of the University of Massachusetts held a two-day symposium on its Amherst campus to honor John Strong and to mark his retirement at the close of the 1981 academic year after 50 years of optics teaching and research. This introduction briefly reviews the symposium papers (published in this issue) that are a testimony to the respect and affection that the world of optics has for John Donovan Strong.
authors.forename: L F
authors.initials: LF
authors.lastname: Cook
authors.forename: H
authors.initials: H
authors.lastname: Sakai
authors.forename: L
authors.initials: L
authors.lastname: Barron