The telescope of Brewster (1781-1868) experiences today a renaissance. It is used for semiconductor lasers in order to change the beam shape from elliptical to nearly circular. It is also used for the temporal compression of laser pulses. In our application the Brewster telescope served to convert a square-shaped beam into a rectangular beam with an aspect ratio of 2:1. Such an anamorphotic process is needed in the context of perfect shuffling, which is an important link in many optical communication networks.