This introduction briefly defines the scope of the feature in this 1 Oct. 1990 issue on gradient-index image systems and discusses where the field is going. The second part of the feature, on microoptics, will appear in an issue later this year. All papers are based on presentations made at the joint symposium MOC/GRIN’89.
© 1990 Optical Society of America
Erich W. Marchand and Hiroshi Nishihara, "Gradient-index optics: introduction by the feature editors," Appl. Opt. 29, 3991-3991 (1990)