The Ninth Topical Meeting on Gradient-Index Optical Systems was held in Monterey, Calif., 8-9 April 1991. In this Introduction we define the scope of the contributions published in this feature issue.
© 1992 Optical Society of America
Ramakant Srivastava, Giancarlo Righini, and Kenichi Iga, "GRIN’91: gradient-index optical systems," Appl. Opt. 31, 5157-5157 (1992)