The ability of GRIN lenses to have flat surfaces simplifies the mounting of the lens, which makes them useful where many very small lenses need to be mounted together, such as in … See more

GRIN lenses are made by several techniques: 1. Neutron irradiation – Boron-rich glass is bombarded with neutrons to cause a change in the boron concentration, and thus th… See more

In 1854, J C Maxwell suggested a lens whose refractive index distribution would allow for every region of space to be sharply imaged. Known as the Maxwell fisheye len… See more

An inhomogeneous gradient-index lens possesses a refractive index whose change follows the function n = f ( x , y , z ) {\displaystyle n=f(x,y,z)} of the coordinates of the regio… See more