Spherical aberration was measured and, by carrying out the computer simulation for ray tracing with the approximate solution of ray equation, the refractive-index distribution parameters of a gradient-index rod lens were determined to most fit the observed data.
© 1983 Optical Society of America
I. Kitano, M. Toyama, and H. Nishi, "Spherical aberration of gradient-index rod lenses," Appl. Opt. 22, 396-399 (1983)