Image intensifiers (Generations 1, 2, and 3) in graded-index systems convert IR radiation to visible light, provide screen presentation, and supply 100,000 gain. An idealized system is described.
© 1980 Optical Society of America
Illes P. Csorba, "Image enhancement for light-focusing gradient-index optical fibers," Appl. Opt. 19, 1139-1142 (1980)