Temperature gradient light waveguide

摘要

Guide for light or infrared wave beam in which a radial temperature gradient deflects towards the guide axis the light rays which tend to diverge therefrom. The isotherm pattern of two sets of four heater wires, each set being formed of pairs of wires diametrically opposite with respect to the guide axis, is calculated and it is shown that it comprises a particular isothermic curve which has the shape of a bean and separates the two sets of wires. The metal wall of the guide is given the shape of this particular isothermic curve and the set of heater wires outside this wall is omitted.